Graflex K-20 Instructions for Operation
Contents
1. Leven Tuse Po 9 od Figure 15 Shutter CaseInterior Vi a Restricted Restricted 3 To the upper plate K20D 361 add the following No 1 leaf assembly K20B 7261 and No 1 pivotsbaft spacer K20B 591 No 2 leaf assembly K20B F262 and No 2 pivotahaft spacer K200 365 No 3 leaf Assembly K20B F26 3 and No pivocabaft spacer K20B 392 No 4 leaf assembly K20B F26 4 and No 4 pivotabaft spacer 208 595 and Snally the No 5 linkdrive leaf assembly K200 F25 and spacer K208 594 Before assembly apply small drop of oil U S Army Specification No 227 to the Shutterleaf pivots Apply a small drop of oil U 5 Army Specification No 227 to the holes in the five connecting links 208 548 and position them on their proper connecting link pins K200 351 to link the five shutter leaves K20B SE together Secure the shuter operating link K200 125 to the No 5 link drive leaf assembly K20B F25 with washer 426 and an Spin 520852 6 Assemble the lower plate assembly K20C F37 and the four be iweens plates spacers K20B 363 securing with two dowel pins 879 510 four Screws ANSO0 5 and lock washers ANS3 6 Before assembling the 12 leaves K201 355 they are to be coated with oil U 5 Army Specification No 227 Care must be taken to remove as much of the oil as posible since non removal will tend to buckle the leaves Set the studs of the2. Replace the shutter as instructed in the preceding pardgraph 1 6 5 Wind and trip it is operating properly Reinsert and tighten the were removed e camera watching the shutter to make sure that hree large fillisterchead screws which Restricted Restricted SoN lt Line Retanina Screws 5 Figure 10 Lubrication Uuterior of Shutter 2 Lubrication General and grease should be placed at the points indicated by 0 or G in figures 10 and Il where otherwise stipulated Use only the oil and grease specified as variation from specifications will cause trouble at low temperatures 2 The oil specified is Oil Lubricating fo Machine Guns U 5 Army Specification No 2 27 9 The grease specified is Grease High Melting Point AAF 5 fication No 3560 soft grade aa Aircraft Instruments and When applying lubricants use them very sparingly and take extreme care to remove all excess b Shutter See figures 10 and 11 1 The shuter should be lubricated every 6 months or after approxi mately every 5000 operations 2 A thin film of grease AAF Speci plied only at the points indicated and a fraction of a drop of oil U S Army specification No 2 27 should be carefully applied to the teeth of the retard segment See figure 15 cation No 3560 should be ap
3. Restricted TABLE OF CONTENTS Section Page Section Page 1 5 Inspection Maintenance and Lubrication E 1 General Description 5 cipem Maintenance MI Detaited Description 5 a General 1 General 5 Cleaning 2 Camera Body 7 4 Removing the Shutter 3 Lens and Shuner 0 000 7 5 Replacing the Shutter 4 Filn Transport Timing the Shun Mechanism eene 7 2 Lubrication 5 Vacuum Back H 2 General 6 Operating Handle 5 Soter 7 Exposure Counter 10 Camera Body 10 ees Ido Disassembly Inspection 9 Reassembly and Final 22 2 FilmLoading Guide 10 1 Disassembly 2 3 K 20 Film Spools 10 2 Inspection 2 in 5 Repair 2 fe Wall Bracket m ple ea ACH CE Js 3 Mechanism Assembly 11 Exposure Counter 12 Side Plate Assembly IV Preparation for Use 18 28 1 General m Operating Handle As 2 Opening and Closing the sembly K10C Es m Hio 26 3 Loading the Camera 13 09 Take Up Spool Rat 4 Inserting the Recorder 14 a 5 Opening and Closing the lewder esM mechanism Rest Plate Assembly K20CHI6 27 y m 9 Vacuum Back Asem 15 bly K20C H22 28 2 Setting Lens and Shutter 15 Cone Assembly 3 Checking the Exposure K20D H25 Counter m e Shuaer Assembly 4 Holding the Camera 15 K2OE FI uoo Las 5 Fil Ten so 16 Replacement
4. To set the shutter winding bevel pinion in order to determine whether the angle of the location of the lower pin shutter winding bevel pinion in a clockwise direction unt approximately 20 degrees clockwise from ihe vertical then turn it counter clockwise as far as possible This will take up all backlash in the entire system while still holding the operating handle firmly against its stop in the wound position At is point the DN eiae da tmt c Which constitutes the proper setting The vertical line intersecting the center of the wiadiog bevel pinion shout be a v ne pura v he straight edge of he mounting plate ion of the lower pin should be 20 degrees vinding bevel pinion 7 Should the angle as determined be within pluvormiaus 1 degree of the proper setting the shutter winding bevel pinion can be re used after repairs have been made 8 Should the angle as determined be in excess of plus or minus 1 degree of the proper setting a new undrilled shutter winding bevel pinion must be assembled into the mechanism assembly the backlash removed the correct anal determined the lower pinhole properly located and drilled and she pin 0 Means have been provided for making an adjustment on the trip link shaft which resets the shutter on the return stroke of the operating handle An adjustment of 5 degrees is possible by turning the triplink adjusting stud The r
5. 8 Vacuum Back The vacuum back 43 figure 3 consists of a retractable pressure plate 25 and a vacuum piston 44 whose movements are synchronized with the film transport and shutter release Its function is to keep the flm flat and in the focal plane during the exposure ea Restricted Restricted 6 Operating Handle The operating handle 23 figure 2 on the right side pivoted near its upper end and one cycle of rotating it forward and back per forms all the operations necessary to prepare the loaded camera for an exposure Pressure on the trigger 24 located under the index finger the upper forward side of the operating handle makes the exposure b When the operating handle is rotated fully forward the film is ad 45 inches and the exposure counter 49 advances by one number Rota handle back to its original position lowers the pressure plate 25 against the film sets the vacuum piston cocks the shutter 30 and locks the flm transport mechanism See figures 2 and 3 c Pressure on the trigger 24 releases the vacuum piston 44 so that the film is drawn back flat against the pressure plate stars the mechanism which trips the shutter to make the exposure and lastly releases the pressure plate ar it withdraws from the film and leaves it free to advance during the next ode 4 The shutier cannot be tripped until the flm is adva cannot be advanced until the shutter
6. Restricted Restricted Camera Body 1 The lubrication given the camera body mechanism at the time of manufacture should be suficient to last indefinitely 2 Should unusual conditions require the mechanism to be relubricated the teeth of gears and cams should receive an exceedingly sparing film of grea 3560 Where they are carried in the casting a fraction Army Specification No 2 27 should be applied to the caring the bearing sur faces of the film metering pinion the pressure roller shaft The vacuum piston rod should receive one small drop of oil U S Army Spe ication 2 7 G No lub vacuum lt jlinder wall ication should be applied to the vacuum piston edge or Figure 11 Lubrication Leaf Center 1 Restricted Restricted SECTION VII DISASSEMBLY INSPECTION REPAIR REASSEMBLY AND FINAL TEST 1 Disassembly When disassembling v taken to note the specific order in which the var assemblies are taken apart in respect to their details ious units for inspection and repair care should us assemblies and sub b Foe the proper order of disassembly of any particular unit the reverse order of reassembly should be followed See paragraph 4 this section The re assembly instructions are detailed enough to require no particular disassembly 6 During disassembly of any or all parts of the camera a careful iaspec tion of each part should be made and any r
7. screw F HRP lock washer ANQSS 4 and a rollee retaining pin that is held in place with Federal Specification No 5271 Apply a small de Specification No 2 27 to bear ings of the film rollers The pressure roller assembly K20B H24 is secured ia position with two retainer links K20B 197 and two pressute roller springs K20B 143 Secure the take up spool guide tod K20B 510 and the film feed spool guide rod K20B 537 to the vacuum back assembly K20C H22 with two retaining clips E785 Secure the vacuum back assembly K20CH22 to the camera cone K20F 567 with two vacuum back plate locating screws K20B 182 a vacutim back plate screw K20B 337 and a screw ANSOS lt 4 7 Secure the mechanism assembly K20D H2 to the camera cone K20F 567 with four Screws 500 65 and four lock washers 93646 E Restricted eg mmn aim Restricted eoa enter a wen Y 5 5 Restricted Restricted CAUTION The end of the counterarm retuen spring K20B 531 must rest on the film feed spool puide tod K20B 537 Fasten the bridge assembly K20B H130 to the side plate assembly K20D H3 and to the vacuum back assembly K20CH22 with two screws 5006 7 lock washers 936 A6 and two screws ANS05 6 16 Secure the k K20B 482 to ihe piston actuating lever K208 98 with the actuating link
8. F1 itioned on the The Folmer Graflex Corporation 156 1083 Rochester New York U S A printes in USA Restricted SECTION REPLACEMENT PARTS LIST id p KCl Vacuum Back tn nd Cinder Eo ater Ata Fior Soter Wind Catch Spring Fim dose Hora Pow Pion Shuler Wind Ciach Pinning Arii gone Dt 50 Wie Tre Unk Song po K208 523 Po Shale sert Viewer 1200 537 Red Suh Spei Guise od Fam Tae Uy Guide Sd pod Verde Ree Pate Arm Rony Count Aetna Pate Ratchet Aeris Take Ub Sot Soro Lover Socio Handle Avent 200 581 Retina Ur Fin Rel 200 587 Shim Lateh Pin Pate Asem Rear 200 602 Ret Pate im Metering Com Fewer Ft p Vacuum Back Aseriy Fim Guide 200 Rote meri Tem fom Rivet Roller Pear fea Cl Reino 300 125 Cone Avent Bes Cove Aas Ft ers Shalt Wind 200 431 Pie Anecbhy Aer Record Pte 208 23 ies Laren Pin See 20841 Sering Verde 208 56 Shue Reusing Lek hing ar
9. has been tripped Figure 4 Shutter Lens Lens Cap Recorder Filters and Wall Bracket 5 Exposure Counter The exposure counter 49 figure 2 is a dial on the right side of the body carrying a scale divided into 50 graduations The return movement of the operating handle 23 is transmitted by gears to the dial 49 so that it ad vances one graduation before each exposure to indicate how many pictures have Been made on each roll The exposure counter is set to zero 50 at the beginning of each roll by ening it clockwise 3 Recorde The recorder 27 figures 2 and 4 provides a means for photographing data in an area of approximately V x 3 inches on the long side of the negative the data being written by the photographer on a transparent card 29 attached to the metal recorder handle 28 slot 22 to receive the recording device is provided in the back of the magazine cover 20 This cover cannot be attached or removed with the recorder inserted Refer 10 section IV The camera mech anism must be wound when the recorder 27 is inserted or removed 9 Viewtin optical Newtonian oblique viewfinder 7 figure 2 is located on Tear section of the cone Depressing the small black leaf spring 10 the right front of its base permits is lens 8 to be raised or J The rear sight 9 figure self automatically When the photographer sights theough the vi
10. it with tape pin 385 60 4 Add the washer 208 462 and drill rod pin K20B 585 Then add the shutter wind clutch pinion K20B 495 washer K20B 462 shutter wind clutch spring K20B 458 and the safety latch K20B 149 Add the washer K20B 462 to the trip link shaft K20B 502 of the shutter trip shaft assembly K20B H20 and insert it into the mechanism rear plate K20B 451 Then add the washer K20B 462 and the rwo drill rod pins K20B 523 Restricted Restricted Position the mechanism rear plate K20B 451 to the side plate assembly K20D H3 in such manner that when the operating handle 8200 541 is in the extreme rear postion and the teeth on the winding sector 200 438 and those on the ion K208 195 are engaged the lower pin in the shutter will form an angle of 20 degrees measured clockwise al center line of the base of the shaft of the shutter winding bevel pinion K20C 401 See figure 12 0 Secure the mechanism rear plate assembly K20C H16 to the side plate assembly K20D 113 with two pias E79 412 _theee screws 500 88 and three lock washers AN the Tink 5201 430 oa the trplink securing wire Q cam follower arm return spring K20B 147 io the cam follower arm renurmopeiag pin K20B 446 and to the spring pio K208 090 The flespool holding pawl ing K20B 492 is secured in the pin the clutch pawi and to the spring Pin
11. should ot be interchanged If a lens is changed to anoiher shuts posts must also be transferred 4 The lens mounting surfaces on the shutter case and on the shutter cover are machined at the same time for cach shutter assembly and are marked with duplicate numbers for identification to preserve the exact centering of the Tenses These two parts should not be interchanged with a cover or case from another uni di 5 The front and rear elements of a lens are n interchangeable with an element of another lens unit b Cleaning 1 The proper method of cleaning lenses ete is to fist brush off dust or grit with a dry clean camel s hair brush The lens tissue or a soft clean dry lintless cotton or linen cloth polish the necessary to moiszen the lenses while clea Never use water alcohol cleaning fuid 2 To clean the rear lens element of the c remove the shutter Refer to paragraph 1 4 Removing the Lens 1 If ic should be necessary to remove the rear lens element from the shutter it is first necessary to soften the shellac with which it is sealed Place one drop of alcohol at any point lens and the shutter it will spread all d three minutes and the rear element may then be unscrewed with the 3 After replacing the rear element seal it again by placir point on the joint drop of mixture made up of 7 parts of grain alcohol of any good shellac 4 Removing the
12. stud K20B 56 and nut AN 340 8 The vacuum piston rod K20B 142 is attached to the pistonactuating lever K20B 98 by means of a couer pin AN380 3 2 Cone Assembly K10D H25 a Position the viewfinder spring K20B 209 and secure to the camera cone 20 567 with two screws ANSI5 4 3 and two lock washers AN935 4 The left hand handle mount K20B 578 is fastened to the camera 201 567 with two screws ANS10 10 6 Then assemble the left hand handle K20B 576 and the handle retaining tube K20B 577 to the lefchand handle mount K20B 578 The camera support hook K20B 213 is secured to the camera cone K20F 567 with lock washer AN935 16 and a mut 19 Secure the viewfinder collar K20B 220 to the viewfinder fc K20B 106 wi in 876 50 14 Secure one end of the viewSinder spring K20B 41 to the viewfinder assembly K201 A31 and position the assembly on the camera cone K20 567 Pass the viewfinder shaft K20B 106 through the shaft housing on the camera cone K20F 567 and the viewfinder assembly K20B A31 Add and secure the viewfinder sight K20B 107 with and bend the fee end of the viewfinder sping 20041 The shutter assembly K20E F1 is timed according to the in structions given in sectiow VI paragraph I f and secured to the camera conc K20F 567 with three screws 901 10 20 and three lock washers AN93S 10
13. text 2 In many instances the drawing numbers given refer to simple sub assemblies which require no individual treatment as to their respective details 2 Restricted d fo sp9wy urpis ti ni Restricted coma emonim tains se Restricted 3 In the system from the operating handle to the shutter winding bevel pinion a difference in accumulated tolerances may occur should it be necessary to make any repairs to the mechanism assembly which would require the replacement of worn or broken parts with new ones 4 This may necessitate replacing the shotter winding bevel pinion with a new one in which the angle of the location of the lower pin must be de termined the hole drilled and the pin inserted 5 To determine whether or not to replace the shutter winding bevel pinion it is necessary to determine whether or not the angle at which the lower pin positions itself conforms to a setting of exactly 20 degrees clockwise from the vertical with all backlash removed when the operating handle is at stop the completion of a winding cycle This can be checked in the following manner Trip the mechanism assembly by pressing the trigger and push ing the actuating link down and then moving the operating handle forward and backward through complete winding cycle Hold the operating handle against position
14. the ball of the rear sight in Tine with the iacersection of the red lines scribed in the finder lens the area visible through the finder corresponds to the area covered by the 10 Access Film Loading Guide The f puide 13 figure 5 is a sheet uf hard rubber with a metal handle that is inserted in the focal plane slot 26 heure 6 during the threading of the film to prevent the tongue of the leader fram curling down into the body and preventing passage of the flm b K 20 Film Spools The K 20 film spools are all metal and about 19 feet 6 inches of film inches wide in addition of leader and trailer 6 Lens Gap The lens cap 19 figure 4 is felelined metal cap that is kept on the lens at all times except when the camera is in use tb protect it against diet and dama ll accom feet each 4 Filters D The filters figure 4 fot the K 20 camera are in bayonet mounts with three spring clips 6 engaging studs 17 on the lens mount to prese falling of in use The filters are Wratten No 25 A red and N 2 minus blue 2 To attach filter place it on the lens mount so that the pi the lens mount engage the spring clips and turn it clockwise until the projections on the springs pass over the pins and snap to secure the filter G To remove a filter reverse the above procedure CAUTION When handling filters touch only the mou
15. the film spool pivot K20B 38 and drillod pin 879 248 Restricted Restricted 2 Operating Handle Assembly K20CHI0 a Secure the operating handle tigger K20B 84 of the trigger assembly K20B H11 in operating handle K20D 541 with a tiggerscrew Toller 208 80 and triggerhandle screw K20B 77 Fasten the operating handle K20D 541 to the winding handle shaft K20B 544 the bearing sure face of which have recived flm of grease AAF Specification No 3560 solt grade with a taper pin 585 20 10 and then add the operating handle spacer K201 154 before inserting into the side plate assembly K20D H3 B Insert the trip shaft K20B 545 of the remainder of the trigger assembly K20B H111 after applying thin flm of grease AAF Speci fication No 3560 soft grade to the surfaces of the sl and adding the four tripshait 609 through the side plate assembly K20D H3 and the operating handle trigger K200i to which it is secured wi inger locking screw K20B 33 SHUTS Deva Binion Hare Saanu Counren pone M Neu Bone Figure 13 Mechanism Assembly Place the following on the winding handle shaft K20B 544 Accwating link assembly K20B H13 after applying a thin flm of grease AAE Specification No 3560 soft grade to the wearing surfaces of the actuating disc K208 538 spacing collar K20B 483 and the winding sector asserib
16. torsion spring 11 on its shaft 12 and whole finder is maintained in operating position by the leaf and torsion springs To close the viewfinder again depress the leaf spring 10 and push back on the top of the finder frame until it snaps into the folded position Restricted SECTION OPERATION 1 General 4 Remove camera from carrying case or wall bracket b Load the camera 6 Remove the lens cap 4 Examine the lens and if necessary clean it as directed in section VI Auach a filter if iis to be used f Write desired information on the recorder 5 Raise the viewfinder 2 Setting Lens and Shutter Determine the diaphragm opening and shutter speed required by ihe pre condition forthe and in use and set the diaphragm knob and Teard knob accordingly 3 Checking the Exposure Counter To keep track of the amount of film remaining in the camera check the exposure counter rear edge of the magazine rests on the chest Keep the elbows close to the chest and do not bring any part of the camera in contact with any portion of the plane lest the image be blurred by vibration on figure 7 directed in the pr ewinder at the ares to be photo Tine with the intersection of 9n the finder len the area visible in the finder corresponds w appear in the negative n exposure is to be made rotate the operating handle fully for it This advances the fl
17. 0B 414 snubber assembly K20B F16 shim K20B 415 Suur cam sop pawl K20C 416 two shims K20B 415 lever KauB OY and de sis K20B 415 1 2 ot 3 ae required Then add the ambber Tim sop rerard segment shaft K20B 110 to which a small drop of oil U 5 my Specification No 227 has been added Add a thin flm of grease AAF No 3360 soft grade te ihe working surfaces of lever 23 wip cam 208 419 and to the stopping surfaces of the shutter Gam 208 20 Fen de folowing in the sheer ewe 40 ran segment Spacer 200 460 retadbepnent assembly retard Sent spacer K208 628 and retard segment spring 208 463 Then add the stop retcbacgment shalt K20D 10 which has received a small drop of oll U S Army Specification No the retard pallet on the retard pallet stud 07 co which a small drop of oil VES Amy Speciation No 227 has been added and secure with washer 20038 and Spin K20B 629 Remove he coupling K201 409 from the shaft K20C F14 and inert the shalt K20B 408 of the remaining assem Biy fao the heaving of the shutter ase 366 which has received a Bl greases AAT Speciation No 3860 solt grade Then secure the tip coupling 300 409 to the arip shaft CK20B 408 with taper pin 176627 Add the ter cam stop pia K208 424 to de rip acad lever K20D 06
18. 12 diaphragm leaves K20B 355 into ihe 12 equallyspaced holes ia the lower plate assembly K20C F37 Postion the diaphragm sector 20 330 on the lower plate assembly K20C 37 so that the 12 slots in it will it over the stude of the 12 diaphragm leaves K20B 355 NOTE When the index mark on the diaphragm sector K20C 356 lines up with the index mark on the diaphragm idler gear K20B 357 the diaphragm must be at is full opening The diaphragm sector K20C 356 is positioned with three diaphragm sectoe screws K10B 364 which are hell in place with shellac Federal Specification No TIS 7 Position the leaf cemer assembly K20D F29 in the shutter case K20D 366 and secure with two dowel pins F79 3 10 three screws 500 65 and three lock washers AN935 6 Secure the free end of the shutter operating link K20B 425 to the shutteropes pin K20B 418 of the trip cam K20B 419 with washer K20B 26 and an S pin K20B 524 keeping the bends in the same place parallel to the top of the shutter ease K20D 366 Always new Spin 8 Turn the upper spring cup K20B 370 i tion so that the shutter spring K200 550 will slip into the slot in the upper spring cup K20B 370 Continue turning until another disti amd the upper spring cup 20 570 becomes latched The 45 degrees has now been pat into the shutter spring K20B 530 The foll tension 15 degrees plus one fall tur or 405 degrees Insert the diaphrag k
19. 14 the wind and trip coupling shafts and the viewfinder The afterpart of the body 1 contains the film transport vacuum system shuter setting and other mechanisms the operating handle 23 and trigger 24 are attached to its right side This afterpart of the body is inclosed in the removable magazine cover 20 figure 2 3 Lens and Shutter 4 The lens 15 and shutter 30 are mounted in the cone 2 and the dials 18 and 31 with which they are set are accessible through ports near The lens is 161 mm 69 inches 1 45 Kodak Anas iy with a diaphragm sealed the standard system of relative apertures from 4 5 to 22 The ront ce of the lens has a diameter of 44 5 mm 194 inches and will accept filters in special bayonet mounts When the camera use the lens is protected by the leas cap 19 The cone extends sufficiently beyond the lens to protect the shutter lens a d filter from damage when the camera is placed nose down on a fat surface Sce figures 2 and 4 b The special shutter 30 figure 4 in which the lens is mounted operates at speeds of 1 500 1 250 and 1 125 second The movements for cocking and releasing it are transmitted from the operating handle 25 figure 2 by co pling shafts inside the cone that connect with the shutter from the rear shutterspeed controls are accessible through ports the cone c The diaphragm an in the upper forward section
20. 208 190 5 Vacuum Back Assembly K20C H22 See igure 14 ton leaf spring K20B 110 and the Tod K20B 142 to the vacuumpision assembly K208 A39 Insert the two latch pin springs K20B 226 one into each side of the vacuum ider K20B 157 Apply small drop of U 5 Army Specification No 227 to each of the latch pin assemblies K201 A40 and insert them over the pin springs K20B 226 Apply U S Army Specifica tion No 227 to the vacuum piston and insert the vacuum y K20B A39 through the base of the vacuum cylinder K20B Then stake the vacuum disc K20B 207 to the base of the vacuum cylinder K20B 157 The pisomand cylinder vacuum back assembly K20C Positioned on the lm guide vacuumback assembly K20CH21 Posi two latin stops K200 25 on the two vacuum hack guide pins K20B 183 and if necessary add the latch pin shims K20B 829 and K20B 587 Secure the two screws ANSI5 2 8 and two lock washers 93642 The assembly K20B A9 is added to the fil guide Vacuum back assembly K20C H21 and held with two film spool retining links K20B 581 two screws F6 HRP and two lock washers AN935 0 The files tering roller assembly K20B H23 after a thin film of grease AAF Specifics tion No 3560 has been applied to the filn metering pinion 20 460 cured to the film guide vacuumback assembly 2 21 with a film spool retaining link K20B 581
21. 4 The scale of hragm control knob carries white numbers as fol lows 36 8 22 to indicate the relative apertures This knob may be rotated in either direction over the range of the markings Bring the de sired f number under the n scribed in the cone at the edge of the bh the scale is visible Do not try to force this knob beyond The scale of the retard knob shutter speed control is marked 125 250 250 and 1 500 second respectively ive intermediate speeds The knob may be rotated itempt should be made to 500 to indicate exposure Intermediate settings will nc freely in either direction over the entire scale but no force it past the stop between 125 and 500 4 Film Transport Mechanism The file transport mechanism figure 3 is a system of cams gears and levers housed in the afterpart of the body Film 514 inches wide rolls approxi mately 20 feet long with 4 foot leader of opaque film and 4 foot paper trailer feeds from a supply spool across the picture aperture and is wound up on the take up spool Each cycle of the operating handle 23 figure 2 advances the film about 4 inches making 50 negatives 4 x 5 inches per roll with a nomi nal interval of Ye inch between negatives A special device disengarcs the film transport when cach 4 4 inches of film have passed through the meter mechanism Restricted Restrict Figure 3 Interior Mechanism
22. 6 Shutter Assembly K20E F1 Remove the spring housing K208 376 from the shutter case and cover assembly K20D F2 Add the spacer K20B 608 to the shutter trip assembly and apply thin flm of grease AAF Specification No 3560 soft grade to the shaft of the assembly Taser the shaft of the shutter cam assembly K20C 39 through the camshaft bushing K20B 373 which has received a thin flm of grease AAT Specification No 3860 oft grade Coat the base of the lower spring cop 208 370 with a thin of grease AAF Specitication No 369 soft grade and secure to the cam shafe K20B 372 with taper pin 276605 Add the camshaft collar K20B 75 shutter spring and the upper spring cup K208 370 Apply a thin flm of Specification No 3560 soft grade to the face of the upper spring 08 370 Place the spring housing 20 376 over the shuttercum shaft assembly K20B 317 and secure with four screws F6 63RP and four lock washers AN988 6 Add the wind coupling spacer K20B 473 and the spriag clip 178 4 To ihe side ol the spring housing K20B 376 add the following the in K20B 375 which has received a thio flm of grease AAF Specification No 3560 soft grade wind stop pin spring K20B 471 and screw FI1 EB2 Restricted O Restricted 2 In he shutter case K20D 366 figure 15 position the following in order Spacer K2
23. Parts LI Restricted ILLUSTRATIONS Complete K 20 Outfit vidi Cover and Recorder Interior Mechanism Shasit Less Lens Cop Recorden and Wall Bracket Complete Outfit in Case 7 Method of Loading Film Holding the K 20 Camera Shuteer Rear View Camera Body Interior View Lubrication Interior of Shutter Lubrication Leaf Center Setting the Angle of the Pin Mechanism Assembly Vacuum Back Assembly Shutter Case lnterior View Table of Index Numbers Page Restricted Restricted 0 Of Figure 1 Complete Restricted Restricted SECTION 1 INTRODUCTION 1 The K 20 Aircraft Camera is identified by the Navy Stock Number 18 C 174 2 The K 20 Aircraft Camera accepts aerial Navy Stock Numbers 9 f00t lengths 18 F 31500 Special Reconnaissance Type 18Y foor lengths 18 F 31502 Special Reconnaissance Type lengths 18 F 31543 Tri X Pan 2 18 F 31546 Tri X Pan 18 F 31525 Super XX Pan ilm identified by the following SECTION GENERAL DESCRIPTION 1 The Type K 20 Aircraft Camera figure 1 is hand held oblique spotting photographs imually operated standard mili 20 camera makes 50 negatives 4 x 5 inches on a roll of special K 20 film The shut ramport mechanisms are interlocked 10 prevent double exposures and skipped frames and have their c
24. Shutter Sce igure 8 1 Wind and trip the camera 2 To remove the shutter take o and lift it out carefully 3 After this has been done extreme care should be exercised not the ttip coupling and upper spring cup on the shutter figure 8 or order to reassemble the shutter to the camera body correctly If they are disturbed it will be necessary to retime the shutter Refer to paragraph 1 this section joint between the way around Allow it to stand for liste end screws Restricted Trie COUPLING Upper Serine Cue Figure 8 Shutter Rear View TRIP SR Lema 5 Figure 9 Camera Body Interior View Restricted Restricted lt Replacing the Shutter See figure 9 2 Before replacing the shutter make certain that the positions of the wind and trip couplings and the wind and trip coupling shafts have not been disturbed If they have it is necessary to retime the shutter Refer to the fol lowing paragraph 12 2 Insert long pin into one of the tapped holes in the bosses inside of the cone Insert the other end of this ong pin into the corresponding mounting hole on the shutter taking care that the wind and trip coupling on the shutter line up with the coupling rods in the camera Slide the shutter into place guid ing it by means of the long pin so that the screw holes in the shutter line up he tapped holes on the mounting
25. a very subdued light Place an empty K 20 spool in the take up end he side away from you toward the viewfinder making sure that the small crosspiece on the end of the drive shaft 33 engages the slot in the center of the spool flange and that the pin in the far lefthand spring 35 is in the hole in the other flange See figure 3 6 Place a full K 20 film spool in che supply end in such a way that the tongue of the leader points up when it is toward you which will cause the film to unwind from the bottom of the roll Break the seal and draw out about 10 inches of the leader 8 Restricted Restricted 4 Insert he ios londing guide 13 in the focal plane slot 26 6 making sure the pressure plate is raised 2 Pas the tongue down around and forward under the black guide roller QU and rough the focal plane slo 26 above the loading guide 4s shown G heute 6 Tum the camera around the take up spool faces Bring the adr up and back between the bright metering roller 39 and the two hier pressure rollers 40 lifting the pressure rollers to facilitare passage Remove the fila loading guide 13 the tongue in the lateral slot in the empty take up spool 42 igure 6 and make sure the leader is centered between the flanges and feeds Then wind two complere torns of lm on the spool with the wake up ine CH mre 2 Vf thin knob will nox tur wind and vip the mecha
26. bosses after the shutter is completely down in the cone f Timing the Shutter tween tripping as occurs when the after the shutter is tripped it will remain open after the second tripping Before pictures can be taken with the camera after this has happened the shutter ust be removed from the camera reset and reinstalled The following instru Remove the shutter from the can the camera and pull the trigger Looking into the cone both the coupling rod pins should be radial if the camera is in proper adjust both pins in the coupling tubes point approximately at the center Of the cone If the shorter coupling rod pin does not point toward the cent of the camera it can twisted counterclockwise with the fingers until licks into place pointing in the proper direction G Time the shutter as follows Set the retard knob at 1 500 second K With the sid of a screw driver route the trip coupling the shutter the shorter of the two slotted balls clockwise and counter clock Wise until no further clicks are heard and then turn counterclockwise as far as possible Now with the fingers turn the wind coupling ihe longer of the two slotted balls counter clockwise until a click is heard after the force of the spriog has been felt Release the coupling and if de winding has been done properly a rod placed in the slot of the ball would point along one edge of the lens
27. d Guide Pt Pen Actuatng Laver Roller nem Parc Sng Pre Roter 200 154 Spec Opera Hone 200 182 Seon Vac ic Retainer 209 529 Sin lah Pin 209 337 Serv icon Bk Poe e Spring Cor Follmer Arm Ren Er p TABLE OF INDEX NUMBERS amen Sher Krab Retard md Con Bre Sot Wall Bracket Bree Wal becker Ex 5524
28. eplacement or repair that is necessary must be noted and recorded 2 Inspection upon disassembly inspection reveals that a part is in need of replace is a piece of held together by a the whole assembly should be replaced even though only a single detail part of same may be in need of replacement This procedure is necessary due to the fact that in taper pianed assemblies only the dimensional relation ships of in exact correlation and only changeable Individual detail parts sembly to the other if they mbly because interchangeable on two assemblies or subassemblies of the same kind All screw threads and taps should be rethreaded where necessary and screws bolts nuts and washers replaced if burred or worn with like parts ia kind and size Loose rivets should be replaced All moving parts gears cams shafts bearings etc showing excessive wear should be replaced and properly fitted All parts should inspected and tested for their assigned tolerances and found to exceed the allowable figures these parts must be discarded and new parts installed The replacements of all screws bad shellac applied to them should be dipped in shellac Federal Specification No TT S 271 A Reassembly General See figures 12 and 13 1 In reassembly the sequence of assembly of details subassemblies and assemblies is indicated by the order of their appearance in the
29. esetting of the shutter must be adjusted so that when the piston is released slowly with the fingers after having been wound by means of the handle in the place the shutter shall operate when the piston is plus inch or minus d inch from the top of the cylinder 24 Restricted Restricted 10 To determine whether the reset adjustment of the trip link shaft 2 Time the shutter and assemble Wind the camera and hold the piston down with the fingers of left hand while pulling the trigger with right hand Let the piston up very Slowly If the shutter operates when the piston is i inch from the top of the cylinder the shutter is properly adjusted Stop at M when the operating handle is pulled backward to the fully wound position a click is not heard at approximately the same time when the edge of the handle is crossing the boss on the side of the camera approximately 15 degrees before end of the handle travel do not wind the camera again as the absence of this click means that the shutter has not been cocked and will not be released when the piston comes up In this case loosen the washer head screw and turn the trip link adjusting stud until click is heard d however no click is heard do not wind camera again as this would cause serious damage loosen the washer head screw and turn the tripink adjusting stad until the click is heard 11 Should it be imp
30. he assembly through the hole in the side plate assembly K20D H3 Secure the take up spool shaft knob 20B 8 to the cop spool shaft K20B 432 with a taper pin 385 60 3 Mechanism Rear Plate Assembly 20 16 4 Before assembling the mechanism rear plate assembly K20C 1116 apply very thin film of grease AAF Specification No 4860 soft grade to the shafts that ron in aluminum bearings and to the bevel gear teeth Add the following to the mechanism rear pl 019 451 washer K20B 462 fila metering cam assembly K20B H17 and the film metering cam pivot K20B 468 The metering lt am followerzarm assembly K20B H118 is secured to the magazine rear plate K20D i51 with a retaining clip F78 3 The ratchet pawl shaft K20B 445 of the ratchet paw assembly K20B H29 has added to washer K20B 489 and is inserted into the magazine rear plate K20B 451 aod held with a retaining clip F78 3 Pass the shaft of the shutter winding bevel pinion K20C 401 through washer K20B 462 mechanism rear plate K20D 451 washer K20B 462 and then add the two drilled pins K201 523 Position the was K20B 462 and the shutter winding bevel gear K20C 402 so that it will mesh with the shutier winding bevel pinion K20C 401 The shutter winding pear shaft K20B 431 is inserted theough the mechanism rear plate K20B 51 and the shutter windiog bevel gear K20C 402 which is secured to
31. i cocks the shutter ses the vacuum mechanism and advances the exposure counu To make the exposure squeeze the tigger gently and su jarring the camera 4 Tarn operating handle forward and fully back to prepare the camera for the next exposure 6 Refer to the exposure counter from time to time as a check on the amount of film being used f When 50 exposures have been made unload as follows to avoid 5 Restricted Holding the K 20 Camera 6 Un When all film is exposed it is necessary to unload and reload the b Operate the camera about 10 or 12 times until its freerer movement in dicates that all the trailer has passed through the focal plane slot and is on the take up spool Open the back as di ted in section IV paragraph 2 remove the full Should be carried oo in a subdued light rer or reload as directed above 7 Storage When the camera is not in use keep it on the wall bracket or in its case Insiructions for placing it in the case are given in section paragraph 10 Restricted SECTION VI INSPECTION MAINTENANCE AND LUBRICATION 1 Inspection and Maintenance General Aircraft cameras and their accessories are precision instruments sod are to be handled and stored as such 2 The shutter of cach camera is a standard unit and can be inter ed with other shutters 3 The focusing posts are adjusted to their particular lens and
32. ly K20C H15 which is secured with taper pin 585 50 5 A thin flm of grease AAF Specification No 3560 soft grade is to be applied to the teeth of the winding sector K20C 438 The trigger spring K20B 553 is attached 26 Restricted Restricted to trip lever revurn spring pin K20B 448 and to the iriggerspring anchor Stud K20B 155 The counter actuating arm K20B 496 should be checked to it is riding on the tip lever return spring pin K20B 148 of the winding 3 Take Up Spool Ratchet Assembly K20B H6 4 To the take up spool shaft assembly K20B H7 add the film winding washer K20B 157 and then add the film stop ratchet K20D 403 Such a manner that it is held im position by the three film stop ratchet guides the three filmwindig pawls K20B 430 on the three 6 making certain that dhe end of each pawl fits into its Slot in the film stop ratchet K20D 403 Place the film drive ratchet assembly K20B H9 on the take up spool shaft assembly K20B H7 that the film winding K20B 450 Xan mesh with the teeth of the flnrdeive ratchet K20B 53 Position the three film winding pawl return springs K20B 481 in the three large slots in the ratchet K20D 408 making certain that they bear against the pawis Add the film winding washer K20B 157 and secure by placing the three Clips E781 over the three pawl shafts K208 456 Then add ihe washer K20B 462 Insert the shaft of t
33. nism the operating handle b Replace the magazine cover and recorder Wind and tip the mechanism ei pa ie the focal planes Be sure the mechanism is wiped uy winding f Set the exposurecounter 49 at 0 zero anf he camera is rendy for operation 4 Inserting the Recorder 2 The recorder figures 2 and 4 consists of a sheet of mattesurface cellu fose acetate film 29 secured to the recorder handle 28 and is carried in the camera in the recording plate holder 22 figure 2 Wind the mechanism and insert the recorder in the slot of the reconling plate holder on the bottom of the magazine cover in such a way that the matte sutface is toward the film The words Top remove slide before cover should face the operator when the camera is in operating position b Information can be written in the three rectangular clear areas on the mauesurface of the acetate sheet figure 4 with a lead pencil of grade HP softer To facilitate writing place the recorder on a flat surface so th curves down over the edge CAUTION When inserting and remo or pull it straight in or out Twisting i and liable to tear the acetate sheet loose 5 Opening and Closing the Viewfinder To open the viewfinder figure 2 depress the black leaf spring 10 under the right front of the finder and raise the finder frame to the vertical The rear sight 9 figure 7 is automatically brought into position by a
34. nob shaft assembly 208 50 to which has been added a thin flm of grease AAF Specification No 3560 soft grade through the hole in the shutersase cover K20C 509 To the diaphragm knob shaft assembly K20B F40 add the diaphragm knob washer K20B 527 and the diaphragm knob K20B 582 which is secured with taper pin F76 50 16 the retrd cam assembly K20B F33 add the retard disc assembly K20B F38 after depositing small amount of grease AAF Specification No 3560 S Restricted Restricted soft grade in the holes of the retard cam stop disc K20B 580 Then add the detent spacer K20B 603 The retard cam shaft K20B 514 of the assembly is inserted through the shutter case cover K20C 509 and to the end of it the retard knob K20B 515 is secured with a retaining pin 7650 16 The retard cam stop spring K20B 604 fase cover K20C 309 with two rivets F671t3 Add and secure the lens Tocking eccentric K20B 517 with lock washer AN935 IL and screw ANS20C1 2 10 The shuttercase cover assembly K20C F36 is pos shutter case K20D 366 by means of a dowel pin F79 4 10 and secured with three screws 500 6 and three lock washers AN935 8 The two parts of the ens K20C 344 are added and the lower half locked in position by means of the lenslodking eccentric K20B 517 The three focusing posts K20B 739 are then screwed into their proper places in the shutter assembly K20E
35. nt so that the glass will not be smudged or scratched Restri Restricted e Wall Bracket 1 The wall bracket 45 figure 4 is attached to the fuselage of the plane with three No 10 52 should be attached to it when in the plane and aot in use as it c Iged accidentally 2 To attach the camera to the wall bracket close the viewfinder hold the camera by both handles with the lens down and the viewfinder toward the bracket slip the pins that form the end of the viewfinder shaft hooks 46 of the bracket press the stud 3 camera support hook against the bracket spring 48 and lower the camera until the stud 3 is home in its slot 47 and the spring has forced the stud into the countersunk receptacles in the bracket See figures 2 and 4 3 To remove the camera from the bracket press the car against the spring lifting it up and then away from the wall ra back 1 Carrying Case 1 The carrying camera and all its acces case is made of fiber and ss plus ewo spare rolls of fi commodates one K 20 Figure 5 Complete Outfit in Case u Restricted trie 2 The disposition of equipment in the carrying case is shown figure 5 The camera should be placed in the case with the recorder inserted the name plate up and its back toward the partition i e with the operating handle next to the hinge The filters 4 are placed in their special compar
36. ontrols located ing handle of the camera vacuum back and pressure ing exposur 3 The lens of the K 20 camera is prefocused 161 mm 6 inches 4 5 set a removable inira lens shutter mounted in the metal cone that forms the front an exposure counter a data recording device a film loading guide and a wall bracket for securing ti he fuselage of the plane when it is not in use are provided Two bayonet mount filters red and minus blue lens cap a film spool and a fibre carrying case are also provided 5 The K20 camera is made of metal largely aluminum alloys It wei 113 pounds loaded and its maximum overall outside dimensions are inches f inches x 11 inches SECTION i DETAILED DESCRIPTION 4 The Type K 20 Aircraft Camera combines in one u components of am aerial camera body lens shui mechanism vacuum back operating controls exposu Sice viewfinder and means for atachmeat to the fuselage when no E The references righu ef top bottom etc in this ace based on the camera being held ia operating pos 38 all of the major film ransport Restricted Restricted i Camera With Cover and Recon Figure 2 Restricted 2 Camera Body The camera body is of cast aluminum alloy The forepart containing the lens and shutter is the cone 2 to which are attached the left fixed handle
37. ossible to make the shutter reset by turning the trip link adjusting stud the shutter should be removed from the camera body and examined for reason for the failure to reset b Mechanism Assembly K20D H2 See figure 13 Side Plate Assembly K10D43 4 To the sideplate casting assembly K20C H4 secure the following Saferylatch return spring K20B 443 with screw 500 2 4 and lock washer 936 42 two fullstroke ratchets K208 10 with four screws ANSOS 6 4 guard rail K20D 32 with two screws 505 4 4 counterarm stop K208 172 with two screws 50044 two lock washers CAN935 4 and two drill rod pins F79 2 6 amd the counterstop spring K20B 144 with screw 500 04 and lock washer AN935 1 To the counter shaft assembly K20B A17 add the counter spring washer K20B 21 Apply thin film of grease AAF Specification N 3560 soft grade to the film exposure counter shaft K20B 20 and insert it through the side plate casting assembly K20C H4 To the other end add the exposure counter dial assembly K20B A16 and secure with taper pin 385 60 3 Place the counter actuating arm assembly K20B H5 on the counteractuating arm pivot K20B 198 secure with a retaining clip 78 3 and add the counter arm return spring K20B 531 A Fasten the film spool friction plate assembly K20B A19 to the side plate casting assembly K20CH4 with the film spool casting assembly K20CH4 with
38. r removed do wot press down on the vacuum piston This will upset the operat cle and require disassembly of both the camera and shutter mechanism for repairs to restore correct operation 2 Opening and Closing the Camera To open the camera stand the camera on its nose with the top view finder away from you remove the recorder 27 unscrew the knurled cov screw knob 21 oo the left side of the magazine cover 20 and slide the cover to the left and off the camera The cover screw is prevented from falling out of the cover by a retaining clip See figure 2 8 close the camera slide the magazine cov the camera making sure that the ridges and grooves erly engaged and that the recorder 27 wot inserted Do cover by inserting the cover screw 21 in its socket and setting it up handught the recorder as instructed below handle 23 to cover 20 as directed above See that the mechanism is tripped that the pressure plate 25 figures 3 amd 6 is raised to permit introduction of the film under it If it is necessary to trip the came check the motion of the vacuum piston 44 with a finger to prevent its ham mering making sure the finger is not caught under the crosspiece as the piston rises CAUTION Do not turn the take up knob 34 figure 2 unless the mechanism is tripped As the film is somewhat protected by its leader it may be loaded into the camera in
39. tment the right rear corner be sure to snap the cover The block inside the lid Will exert a slight pressure on the magazine cover to hold the camera when the lid is closed The compartment at the left end of the case is for film 50 and the flm loading guide 13 may also be kept in this compartment 3 To remove the camera from the case figure 5 grasp it by both handles and lift it straight up When removing filters from their compartment handle them by the edge of the mount only to avoid smudging the glass 11 Exposure Counter sh eure comes vibe mhen the magazin cover it fran operaced After each 10 000 cycles the entire mechanism especially the Shuuer should be thoroughly overhauled Figure 6 Metbod of Loading Film E Restricted Restricted SECTION IV PREPARATION FOR USE 1 General CAUTION Do not operate the camera with notbing in the focal plane slot because the vacuum back is not designed for operation undamped If it should be necessary to operate unloaded insert the film loading guide 13 or a piece of paper or old film under the pressure plate Q5 check the free movement of the vacuum piston See figures 3 and 6 Do wot force any part or movement Difficulty indicates that Something is wrong s0 check back on your previous adjustments before proceeding Aluruys release the shutter before putting the camera aside When the mechanism and shutter are tripped and the cove
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