US2371593A - Motor-driven shutter-release mechanism for automatic cameras - Google Patents

Description

March 13, 1945. A, GQREY ETAL 2,371,593

MOTOR-DRIVEN SHUTTER-RELEASE MECHANISM FOR AUTOMATIC CAMERAS Original Filed Feb. 19, 1943 7 Sheets-Sheet '1 March 13, 1945. A. H. GOREY ETAL MOTOR-DRIVEN SHUTTER-RELEASE MECHANISM FOR AUTOMATIC CAMERAS Original Filed Feb. 19, 1943 7 Sheets-Sheet 2 HI IHH H l c l l l I I M 1N VENTORS.

N (YJ March 13, 1945. GOREY ETAL MOTOR-DRIVEN SHUTTER-RELEASE MECHANISM FOR AUTOMATIC CAMERAS Original Filed Feb. 19, 1943 '7 Sheets-Sheet 3 Mrch 13,1945. H, GOREY ETAL MOTOR-DRIVEN SHUTTER-RELEASE MECHANISM FOR AUTOMATIC CAMERAS 7 Sheets-Sheet 4 Original Filed Feb. 19, 1943 March 1945. A. H. GOREY ETAL y 12612720311 J Niisczw.

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MOTOR-DRIVEN SHUTTER-RELEASE MECHANISM FOR AUTOMATIC CAMERAS Original Filed Feb. 19, 1945 March 13, 1945. A. H. GOREY ET AL 2,371,593

MOTOR-DRIVEN SHUTTER-RELEASE MECHANISM FOR AUTOMATIC CAMERAS Original Filed Feb. 19, 1943 '7 Sheets-Sheet 7 IIIII/II/I a Re new aims 71 Patented Mar. 13, 1945 UNITED STATES PATENT OFFICE MOTOR-DRIVEN SHUTTER-RELEASE MECH- ANISM FOR AUTOMATIC CAMERAS Original application February 19, 1943, Serial No. 476,456. Divided and this application October 23, 1943, Serial No. 507,370

13 Claims.

This application is a division of co -pending application Ser. No. 476,456, filed February 19, 1943, in the names of Archie H. Gorey, Louis D. Nadel, Reynold J. Nitsch and Oscar Steiner, for automatic aerial cameras.

This invention relates more particularly to motor-driven curtain-shutter release mechanism for cameras, which may be of general application, and particularly to fully automatic aerial cameras.

In order that the principle of the invention may be readily understood, there is disclosed a single embodiment of the invention in the accompanying drawings, wherein- Fig. 1 is a right-hand side elevation of the camera as mounted in an aeroplane and showing the driving motor partly broken away, the cable for connecting the mechanical power from the motor to the camera being also shown;

Fig. 2 is a left-hand side elevation of the camera with the mechanism plate and motor drive removed so as more clearly to show the camera operating mechanism;

Fig. 3 is a detail of the shutter release cam plate;

Fig. 4 is a left-hand end view of Fig. 3;

Fig. 5 is an enlarged detail of the operating lever or link for the capping gates;

Fig. 6 is a partial section through the camera taken on the line 6-6, Fig. '7,'showing the motor drive mechanism and its application to the camera drive mechanism;

Fig. 7 is an enlarged fragmentary view similar to a part of Fig. 1, certain parts being broken away more clearly to show the operation of the mechanism;

Fig. 8 is a view similar to Fig. '7, but having additional parts broken away so as further to show the motor drive mechanism;

Fig. 9 is a plan view of the shutter curtain showing the several apertures thereof;

Fig. 10 is a left-hand side elevation showing in full lines certain only of the parts shown in Fig. 2, and indicating their movements by arrows; and

Fig. 11 is a vertical transverse section through the camera, showing the position of the film spools, the shutter curtain spools and shutter curtain rollers, the capping gates being shown held open as they are when the camera is used for night photography.

The motor-driven curtain-shutter release mechanism herein disclosed is shown and de scribed as used in an aerial camera intended primarily to be operated by an electric motor, but it can be readily operated by hand. The invention herein claimed is not to be limited to use in an aerial camera.

While the invention herein claimed is directed to motor-driven curtain-shutter release mechanism, brief reference will be made to certain parts of the camera structure, and particularly to Fig. 1.

Referring first to Fig. 1, wherein the camera is shown in outline in the position in which it is to be mounted in an aeroplane, the camera body is indicated at 20, and thereto the camera magazine 2| is attached by screws 22, 22, said magazine being provided with a mechanism cover indicated generally at 23 and held to the magazine by screws 24, 24. Attached to the said mechanism cover 23 is a motor-drive-unit mechanism, housing or box, indicated generally at 25, and having a flange-like formation 26, the said unit, housing or box being held to the mechanism cover 23 by screws 21, 21. A worm gear housing 28 is attached to the said motor drive unit 25 by screws 29. 29 and formed integral with the unit or housing 25 is a box-like structure 30 (best shown in Figs. '7 and 8) having a cover 3| (Fig. 1) attached thereto by screws 32, 32 threaded in suitable holes in the said box-like structure 30.

Projecting from the magazine cover 23 is a shutter reset knob 33, an escutcheon plate 34 being also attached to said cover 23 by means of screws 35 35, and through said plate 34 the shutter speed indication is visible, as clearly evident from Fig. l. A signal receptacle 36 is attached to the camera body 20 by screws 31, 31, and by suitable screws (not shown) a lens support 38 is attached to the lower face of the camera body, and to said lens support is attached a lens shade 39. A lens mount 40 with a suitable lens for-aerial photography particularly, though not exclusive, is shown in said figure in dotted lines, and it is therein represented as provided with a diaphragm adjusting lever 4i that protrudes through an open slot 42 in said lens shade 33, being held in position by a lock plate 43 attached to the lens shade 39 by suitable screws.

Also shown in Fig. 1 is a flexible shaft coupling 44 of suitable construction that is attached to the worm gear or motor drive housing and to said coupling 44 is fitted a suitable flexible shaft coupling 45, itself attached to a flexible shaft, tubular housing 46 through which passes a flexible drive shaft 41. The opposite end of the said flexible shaft, tubular housing 46 is provided with a second coupling 48 attached to an electric drive motor 49 supported on a wall of the aeroplane by means of a support plate 50 and screws I, 5|.

Fitted between the camera magazine 2I and the camera body is a capping gate supporting plate I2I, .and between said supporting plate I2! and-asuitable aperture-plate receiving ledge :23 are mounted (as shown in Fig. 11) the shutter-curtain rewind roll I24 and shutter tension roll H5, and the shutter curtain I29, which is wound upon the shutter rewind-purtainroll I24 before making an exposure andwhen released for making an exposure, is--wound.onithe tension roller I25 by a suitable tension-pring:i28,; guide rollers I and I3I being provided. These parts, not being herein claimed, need not be more specifically described.

Reference being made particularly to Fig. wherein, without in any way limiting the scope of the invention, there is shown a suitable shutter curtain, it is to be understood that such curtain is providedwith at leasttwo exposure apertures. Preferably, as shownin' .saidfi ure, the shutter curtain I 29, desirably .of rubberized cloth, is presentedas having two instantaneous exposure apertures IZSmand I291) foitday .photographyand a full exposure aperture I290, the latter being used when making night or flash exposures. The instantaneous aperture I29a. isused for the highest shutter speed which in the present embodiment of the invention is ofa second. The shutter aperture I291) is used for the lower instantaneous speed, which in the presentinstanceis of asecond. Both of said apertures can be so proportioned .thatany desirableshutter speed ,can'be obtained, and are l ed fonday photog aphy. The shuttercurtain aperture I250 is, as stated, used when making night or flash photographs. .All the curtainaper- .tures are provided with usual or suitable metal struts or reinforcing members.

Concerning the capping gate structure, it is sufiicient to state that the capping gate supporting plate I2! haspivoted thereto the righthandcapping .gate 132 and ,the left-hand cappin gate J33 having suitablejhinges. A latch plate I38 is attached to the hinge member of the capping gate I32 in any suitable manner ,and is provided with two right-.angularly shaped members 141) I4!) having suitable holes to receive a rod or shaft I Il passing therethrough and into holes provided'for that purpose in the capping gate supporting plate 'I2I In Fig. 2, the capping gates I32, I33 are shown in their closed 'horizontal position in dotted lines, and are also shown in dotted linesin their open position. The normal position for said capping gates I32, 1'33 is a closed position, and they are in the open position only during the time of making an exposure, as well as at certain times prior to making a night exposure.

As indicated in Fig. :2, to the left-hand flange of the capping gate supportingplate :IZI is fitted a capping gate actuating disk, indicated at I 41, through which'passes a shaft to the opposite end whereof is fittedandsecurely locked a pinion I 18.

fitill ;referring to Fig. 2 and also to ,-Fi gs. 5 land 16, thereis provided in meshing relation with the pinion I .48 a gear 149 having attached thereto a ,master shutter release lever I 50, said ar and leveribeingifree to rotate on a shoulder rivet I-5I itself riveted to the pircular gear housing 1,552 of the camera ,magazine 2!. The said disk I41 is connected to the hinge member I34 of the capping gate I32 by a connecting link member 152a .(shown in Fig. 2)., one end of said link member being attached to the said disk I41 by shoulder rivet I53 (shown in Fig. 6), the opposite end of the said link member I52a being connected to the said hinge member I34 .of the capping gate I32 .bYfinShOllldBlllVEt I54 (best showninjFig. 2 .as.triveted into .the rightangle extension I40 of the said hinge member I34). The hinge member for the capping gate I33 is'connected to the said disk I41 by a connecting member l55 (best shown in Fig. 2) and by a shoulder rivet I56, Fig. 6, and is connected to the right-angled member I44 by a shoulder rivet I51.

When the :master shutter release lever I is turned in a clockwise direction viewing Fig. 2, .thedisk I II will be rotated in a contraclockwise direction, thereby causing the connecting link member! 52ato be moved in a right-hand direction, carrying with it the right-angled member I 59 of the hinge plate I34, thus causing the capping gate 532 to-be turned in .a .contraclockwise .jdirection viewing Fig. .2 (that is, into its open position), andthe capping; gate I33 will be caused to be turned in a clockwise'direction (that is, into its open position) through the connecting link memberi55. .The shoulder-rivet I56 (Fig. 6) is provided with a cylindrical extension I58 (shown inFigs'Z, 8 and 10) that engages a secondary shutter release leverI59 (shown in Figs. 6, 8 and 10) for releasing the shutter when the capping gates I32, I33 approach their full open for the purpose of turning the said shaft, and

thereby tensioning the usual spring for said shaft. When sumcient tension has been placed on said spring, screws 163, Ifiiare threaded into suitable holes in the saidmagazine outer wall 83 so as to engage notches I54 of the said lock plate I52.

Referring now to Figs. 2 and 6, when the shutter curtain I29 is rewound for making an in- .stantaneous exposure, the pinion I60 is turned in a clockwise direction by means of a shutter rewind gear I that for suchpurpose is turned ln'a contraclockwise direction. In order to turn said pinion I ina clockwise direction for rewinding the shutter curtain, there is provided a train of gears, also serving for winding film I23 onto the take-up spool for a subsequent exposure. Meshing with the said shutter rewind gear 55 is an idler gear I that meshes with a second idler gear I61, both of which idler gears are mounted on a gear rocker arm 168 (see also Fig. 10), the idler gear IE6 being mounted on a shoulder stud I66a (bestindicated in Fig. 6), the idler gear I61 being provided with a shoulder rivet indicated at I 69. Threaded into the magazine end wall 83, as indicated in Fig. 2, is

a shoulder screw I10, and pivoted thereon is the said gear-rocker arm I53 and also an idler gear I'II.

Mounted on the take-up spool shaft 98 is a slip clutch drive (indicated generally at I12) having a gear I13 indicated indotted lines in Fig. 2

as meshing with the idler gear I 1| and also with an intermediate gear I14. The said gear I 13 is of suflicient width to accommodate the faces of both gears HI and I14, inasmuch as said latter gears are not in alignment but are so spaced that the gear I14 clears the gear I1I.

Attached to the said intermediate gear I14 is a drive pinion I15, said gear and pinion being carried on a shoulder stud I16 threaded into the end wall 83 of the camera magazine. Meshing with the said drive pinion I15 is a main drive or master gear I11 having drive pins I18, I18. The said main drive gear I11 is mounted on a shoulder stud I19 fitted to the said magazine end wall 83 (clearly shown in Fig. 6), the said main drive gear being held in place by a large head screw I80, and it is also provided, as shown in Fig. 6, with a hub I11a so as properly to space said main drive gear from the magazine end wall 83.

When the main drive or master gear I11 is turned in a contraclockwise direction viewing Figs. 2' and 6, the gear train, consisting of the gears I11, I15, I14, I13, I1I, I61, I66 and I65 and the pinion I60 will be caused to turn, said pinion I60 being turned in a clockwise direction so as to wind up on the curtain roller. the shutter curtain I29 and the shaft of the take-up spool therefor will drive the spool in a contraclockwis e direction, thus windingup the film I20, and as the film I20 is so wound it passes over and around the measuring roller, the shaft 93 whereof is turned in a clockwise direction, turning with it a pinion I8I, thereby causing an index gear I82 (shown in Fig. 2) to be turned in a contraclockwise direction. Said index gear I82 is mounted on the magazine roll by means of a shoulder screw I83. Attached to the index gear 182 is a cam plate, shown in dotted lines at I 84 in Fig. 2, being attached by suitable screws I85.

When the measuring roller on shaft 93 has turned a'sufiicient distance to cause a notch in the said cam plate I84 to be in the position shown in Fig. 2, the L-shaped end of a pawl arm I86 will drop into the said notch under the influence of a spring I81 carrying with it a pawl I88. the said pawl arm being mounted on the magazine end wall 83 by a shoulder screw I89 (Fig. 2). The said pawl I88 will now engage the teeth of a ratchet I90 of the said slip clutch I12, thus preventing further turning movement of the said take-up spool and thereby stopping further movement of the film I20.

The slip clutch I12 (indicated in Fig. 2) may be of any suitable construction and is desirably of the structure shown in the co-pending application of Gorey, Nadel and Hineline, Ser. No. 437,240. filed April 1, 1942, now Patent No. 2,362,813, dated November 14, 1944. The requirements of such slip clutch will now be set forth, and reference will be made to the immediately coacting parts. The shaft 98 carries and drives the take-up spool and integral with said shaft is the said ratchet I90. The gear I13 is mounted on the said shaft 98, but in such a manner that when a predetermined load just sufiicient to wind film I20 on the take-up spool is put on said shaft 98, the said gear I13 will be allowed to turn even though said shaft 98 is held in a stationary condition. Therefore, when sufficient film has been measured off for an exposure, the L-shaped end of the pawl arm I86 engages the notch in the cam plate I84, and its pawl I88 will engage the teeth of the ratchet I90, thus preventing the take-up spool from being turned, but allowing the gear I13 to continue turning so as to complete the winding of the shutter curtain. The diameter of the measuring roll on shaft 93 and the gear ratio between the pinion I8I and the index gear I82 is such that when the index gear I82 makes one complete revolution, a sufiicient amount of film will have been fed to provide a new unexposed area of film in front of the exposure opening.

Referring to Figs. 2, 6 and 10, there is attached to the shutter curtain rewind gear I65, in a manner to be more fully described at a subsequent point, a shutter release cam plate I9I having a peripheral notch I92. To the magazine end wall 83 (best shown in Fig. 2) a shutter latch or subsidiary release lever I93 is attached by means of a shoulder screw I94, it being caused to rotate in a contraclockwise direction about the screw I 94 by a spring I95, one end whereof is hooked in a hole I96 of the lever I93 and the opposite end whereof is engaged by pin I91. The said latch or subsidiary release lever I93 is provided with a downwardly extending dog I93 for engaging the peripheral notch I92 of the shutter release cam plate I9I.

In Fig. 2, the mechanism is shown in condition for making an exposure, at which time the shutter curtain I 29 has been rewound, so that the previously selected aperture will be in position for exposure, and a new area of sensitized film will be in position before the exposure opening. The capping gates I32, I33 will be in the horizontal position shown in the upper dotted lines in Fig. 2 (that is, in their closed position), and the pressure plate or pad II5 will be raised vertically from the film I20 (most clearly shown in Fig. 6). The said pressure plate or pad I I5 is for that purpose positioned on four pressure plate or pad raising pins I99 that pass through suitable holes of the inner wall of the camera magazine and also through suitable holes in the capping gate support plate I2I (shown in Fig. 2).

When the capping gates I32, I33 are in the open position (shown in the lower dotted lines in Fig. 2), the pins I99 are caused to be moved downwardly by the pressure plate or pad II5 through the action of suitable plate springs 200, shown in Fig. 11 as pressing on the vertical members I I6, H6 of the pressure plate or pad H5. When the capping gates I32, I33 are closed (as indicated in the upper or horizontal dotted lines in Fig. 2 and in section in Fig. 6), the rods I99 are moved in an upward direction under the influence of the suitable hinge members, thus raising the pressure plate or pad I I5 to the position indicated in Fig. 6.

When the master shutter release lever I50 (shown in Figs. 2 and 6) is caused to be rotated in a clockwise direction viewing Fig. 2, thereby opening the'capping gates I32, I33 prior to making an exposure, as shown in the lower dotted line position, Fig. 2, the said pressure plate or pad H5 will be moved downwardly by means of the said springs and will then securely hold the film I20 in contact with the exposure aperture plate, thereby clamping the film I20 between the said pressure plate or pad H5 and the said aperture plate. Said film I20 will be held in such clamped condition as long as the master shutter release lever I50 is held in the left hand position viewing Fig. 2, that being the position for making an exposure. When the said master shutter release lever I50 is released or allowed to turn in a contraclockwise direction viewing Fig. 2, thus closmg the capping gates I32, I 33, the pressure plate or pad I I5 will be removed from contact with the film I22, thereby preventing any scratching or injuryv thereof during film winding prior to a second exposure.

In order to cause an exposure to be made, the following action takes place, reference being made particularly to Fig. 2 and also to Figs. 5, 6, 8 and 10, it being understood that the action in this respect is similar to that disclosed in the said co-pending application of Gorey, Nadel and Hineline, excepting for the means herein disclosed for turning the master shutter release lever I50 which is provided instead of the lever of trigger 40, shown in said co-pending application. The said master shutter release lever I50 is caused to be turned in a clockwise direction viewing Figs. 2 and 10. This is actually done by the motor drive mechanism to be hereinafter fully described, and already referred to in the description of Fig. 1, but for simplification of the description at this point, it may be assumed that the said master shutter release lever I52 is moved manually. When so moved in a clockwise direction viewing Fig. 2, the gear I49 is also turned in a clockwise direction and pinion I 48 is turned in a contraclockwise direction, turning with it the disk I41. Inasmuch as the shutter gate connecting links I52, I55 are connected to the said disk I47, the capping gates I32, I33 will be swung open into the lower dotted line .position shown in Fig. 2. The pressure plate or pad I I5 is thus allowed to move into contact with the film I20, and the pin I58 (shown in Figs. 2, 8 and 10 as in a slot of the secondary shutter release lever I59) will be turned in a contraclockwise direction, causing the secondary shutter release lever I59 (shown in Figs. 2 and 10) to be swung in a clockwise direction.

While all the operating parts herein claimed are shown in Figs. 2 to 8 inclusive, we have shown in an additional Fig. 10, in full lines therein, certain only of the parts that are shown in Fig. 2, since in Fig. 2 certain of the operating parts of the train of mechanism herein claimed are shown only in dotted lines. It is sufficient here to state that in Fig. 10 substantially only those parts are shown which are necessary to enable those skilled in the art to trace out the operation of the shutter from the drive mechanism. The capping gate mechanism is shown also in part in said Fig. 10, but therefrom are omitted substantially everything pertaining to the film supporting mechanism including the supply spool, the take-up spool, the measuring roller and the film rewind mechanism. We have also from the said Fig. 10 omitted the camera body and the camera magazine with its mechanism cover.

From all said figures have been omitted the pressure plate or pad II5 (shown in Fig. 11) for holding the film in flat position, and from Fig. l0 has been omitted the aperture plate with which the camera magazine is provided, and between which aperture plate and the said pressure plate or pad H5 the film I20 is held during the time of the exposLu'e thereof.

Inasmuch as the shutter curtain rewind roll I24 and the shutter tension roll I25 are of usual construction, they have been omitted from all said figures except Fig. 11, but the drive shaft I26 of the shutter rewind roll is shown and is also shown in Fig. 11. v

The capping gates constitute structurally and in function a part of the shutter mechanism. Said capping gates are shown in dotted lines in Figs. 2, 8 and 10, and partially in full lines in Fig. 6. They are shown in full lines in Fig. 11, and therein is also shown the entire shutter mechanism, including not only said capping gates, but also the shutter curtain I29 and the means for supporting the same. While in said Fig. 11 the pressure plate or pad II5 for holding the film I20 in flat position and the means for supporting the film I20 are shown, it is unnecessary to describe the same, inasmuch as the invention herein claimed is directed particularly to the motor-driven curtain-shutter release mechanism.

Referring to said Fig. 11, between the camera magazine and the camera body 20 is the capping gate support plate I2I having a flanged opening I22. Between the support plate and the aperture-plate-supporting receiving ledge I23 are the shutter curtain rewind roll I24 and the shutter tension roll I25, both of usual construction. The said rewind roll I24 is provided with the drive shaft I26, and the tension roll I25 is provided with the tension spring support I21 and the tension spring I28. The shutter curtain I29 is wound upon the said shutter rewind curtain roll I24 before making an exposure, and when released for making an exposure it is wound upon the said tension roll I25 by the said tension spring I23. In order to position the said shutter curtain I 29 as close as possible to the focal plane, there are provided the curtain idler rolls I30, I31 supported on suitable pivots provided in the magazine end walls.

Referring to the capping gates and still referring particularly to Fig. 11, the hinge member I34 is provided with the said two right-angularly shaped members I40 having suitable holes to receive one rod or shaft I4I passing therethrough and into holes provided for that purpose in the capping gate support plate I2I. The hinge member I35 is provided with right-angularly extending members I44, I44 receiving the other rod or shaft I4I. Springs I42 and I45 are fitted over said shafts or rods I4I, one end of each spring beinghooked over a part of the adjacent hinge plate, the opposite end of each spring engaging the lower flange of the capping gate support plate I2I.

Inasmuch as the capping gates I32, I33 are structurally and in function a part of the shutter mechanism and are controlled from the motor drive, shown in Fig. l, we have herein shown the train of mechanism extending from the motor 49 to the shutter curtain I29 and the capping gates I32, I33 of the shutter mechanism, thus completely disclosing the means for automatically releasing the shutter curtain I29 and for operating the capping gates I32, I33.

So far as we are aware, we are the first to provide means in an automatic camera for periodically operating capping-gate means and releasing the intimatelyco-acting shutter or shutter curtain, or other shutter element or shutter proper, used instead of a curtain type of shutter. In the operation of the shutter mechanism, the means for which is herein subsequently described in detail, the shutter curtain I29, when released. is allowed to run down, and there is a dwell in the movement of a lever or link hereinafter described, owing to the cam formation of such lever or link, and during such dwell the capping gates I 32, I33 are held open. Subsequently the master shutter release lever I5!) is returned to its starting position, thus closing the capping gates I32,

I33. This allows the idler gear I66 to mesh with the shutter rewind gear I65, so that the shutter curtain I29 is rewound and the film I20 moved for a new exposure. During a complete cycle of an interrupted gear (hereinafter referred to) the capping gates I32, I33 of the shutter mechanism are caused to open, thereby, through the action of the lever or link referred to, operating the master shutter release lever I50. During such cycle the capping gates I32, I33 are opened, the idler gear I66 is disengaged from the shutter rewind gear I65, and the subsidiary shutter release lever I93 is moved upwardly to disengage the dog I98 from the notch I92 of the shutter release cam plate I9I, whereupon the shutter curtain I29 can run down.

I In the operation of our invention, there is provided shutter mechanism including a shutter proper I29 that is preferably of the curtain type and capping means preferably composed of two capping gates I32, I33, which shutter proper and capping means are in immediate proximity and are intimately associated with each other, and we provide operating connections from the motor drive to the capping means and the shutter proper I29 to control or operate said capping means and to release the shutter.

The secondary shutter release lever I59 is attached to a shaft 202 (most clearly shown in Figs. 6 and 10) that passes through the magazine end wall 83. To the right-hand end of said shaft 202, viewing Figs. 6 and 8, a lever 204 is attached by means of a lock screw 205 (Fig. 2), such lever carrying a shoulder rivet 206 (shown in Figs. 2, 6 and 10) engaging a slot 201 of the gear releasing link 208 (best shown in Figs. 2, 8 and 10), which is attached to the rocker arm I68 by a shoulder screw 209. As the said lever 204 is rotated in a clockwise direction, viewing said figures, the shoulder rivet 206 moves upward in said slot 201 and the upper face of said lever tain will now be allowed to run down, thereby making an exposure.

Referring now to the master shutter release lever I50 on gear I49, when said lever I50 is caused to be moved in a contra-clockwise direction viewing Fig. 2 under the influence of springs I42, I43 and I45 of the capping gates I32, I33, the lever 204 through the intermediary of the lever I59 and link I55 will be returned to the position shown in Fig. 2. The idler gear I66 carried on the gear-rocker arm I68 will be allowed to move in a downward direction so as again to engage the shutter rewind gear I65 and allow the shutter latch or subsidiary release lever I93 to drop onto the shutter release cam plate I9I (Figs. 2 and 10), the locking lever 2I0 being caused to move in a clockwise direction, thereby allowing the hooked member 2 I4 again to engage the cylindrical extension 2 I5 of the shoulder rivet I69. The camera will then be in condition for the rewinding of the shutter and the feeding of a new area of film before the exposure opening.

Referring now to Fig. 2, as the shutter curtain I29 runs down and, in doing so, turns pinion I60 on the shaft of the curtain take-up roll I in a contraclockwise direction and also turns the shutter rewind gear I65 in a clockwise direction, a pin 2 I 8 carried by the shutter release cam plate I9I (Fig. 3) will have turned with the shutter rewind gear I65 until said pin 2I8 contacts with a bell crank lever 220 (shown in full lines in Fig. 6 and in dotted lines in Fig. 2). The said bell crank lever 220 will be caused to move in a contraclockwise direction on shaft 202 (Fig. 6), carrying with it a film-feed dog-connecting-link 22I that is attached (as shown in Figs. 2 and 6) to the said bell crank 220 by means of a shoulder rivet 222. The opposite end of the said connecthooked formation 2I4 for engaging a cylinder shoulder rivet 206 of the lever 204 reaches the bottom of the slot 201, the rocker arm I68, Fig. 2, will be caused to move in an upward direction to disengage the idler gear I66 from the shutter rewind gear I65.

Further movement of the said lever 204 through the operation of the secondary shutter release lever I59 (Fig. 10) will cause the shutter latch or subsidiary release lever I93 to be turned in a clockwise direction by reason of a shutter release link 2I6 (Fig. 2) that is attached to the rocker arm I68 by screws 2", thus withdrawing the dog I98 from the notch I 92 of the shutter release cam plate I9I (Fig. 4). The shutter curing link 22I is attached to the pawl arm I86 (as shown in Fig. 2) by means of a shoulder rivet 223. The pawl I89 will now be disengaged from the ratchet teeth I90 of the clutch I12 and the L-shaped end of the pawl arm I86 will be disengaged from the notch in the cam plate I84 (Fig. 2)

When the main drive or master gear I11 (Fig. 2) is now turned in a contraclockwise direction for rewinding the shutter curtain I29 and feeding and winding sensitized material I20, the shaft 98 (Figs. 1 and 2) will be free to rotate, and film is accordingly wound up on the take-up spool 96, causing the measuring roller on shaft 93 to be turned and also moving the notch in the cam plate I84 away from the L-shaped end of the lever I86. As the main drive or master gear I11 continues to turn, the shutter rewind gear I65 will also be turned, carrying with it the pin 2I8 (Fig. 2) in a contraclockwise direction and away from said bell crank 220, (Figs. 2 and 6), allowing the pawl arm I86 to be turned in a clockwise direction, but it will be withheld from turning sufiiciently far to allow the pawl I88 to engage teeth I90, because the notch in the cam plate I84 will have moved out of a position in which it could be engaged by the L-shaped end of the pawl lever I86, and it will be held in such disengaged position until a suificient amount of film has been wound to provide an unexposed area for a new exposure. The cam plate I84 (Fig. 2) will then have made a complete revolution, and the L-shaped end of the pawl I86 will again engage the notch in th cam plate I84, as? the pawl I88 will engage the ratchet teeth Referring to Fig. 2, the shutter rewind gear I65 will continue to rotate until the notch I92 in the cam plate I9I is engaged by the pawl I98 of the shutter latch or subsidiary release lever I63. The shutter will now be fully rewound and an unexposed area of the film I28 will be in position.

Referring to Fig. 2, the shutter rewind gear I65 will be stopped from further turning in a contracl'ockwise direction by pin 2I8 engaging said bell crank 228. The rocker arm I63 is caused to be turned in a clockwise direction for engaging the teeth of the gear I66 with the teeth of the shutter rewind gear I65 by means of a suitable spring (not shown), but one end of which is hooked to a pm 225 at the extreme upper'e'nd of Fig. 6 that is an extension of a shoulderrivet 226 (shown in Fig. 6) that carries the gear I66. 7

One revolution of the shutter rewind gear I65 with its shutter setting knob turns the pinion I66 and thecurtain take-up roller I213 sufiicientl y to "move the shutter curtain I29 just the right distance 'to bring into position a different curtain 'aperture for a subsequent exposure, That is to say, if the shutter curtain I29 were previously-set in'a position to have the exposure 'slot for zgb dfasecond aligned for making an exposure, one complete "turn of the shutter setting linobiii 'a contracloclwise direction would bring the shutterfcurtain I29 in position for a of-a second ft'e'xposure. It the shutter curtain I29 had been 'setinposition for a /6 of a second expothen't'wo iull turns of the shutter setting knob in aclockwise direction would so move the shutter 'curtainfiB that the full open curtain aperture would "hem-position to move before the shu tter'jcurtain fIZ'S'eXposure"opening, when the shutter was released. This provides ready means offselect'in'g any particular shutter aperture.

lVla Ii'g. fefer'enee to Figs. 1' and 51:0 8, it is to be u stdodfthat the foregoing description of the operation of thecam'era mechanism assumed th'atjthefn iain drive geardr master gear in is operatedin'an'ually, butthe present invention'ihcludes, and is in part particularly directed to, thefprcvisifomas' s aver feature or a drive mecheni'sm'pmvidih'g auwms m operation, which in the disclosed embodiment of the invention is made l p ofagar box or housing constituting the five'itmpre iou l r e re n. n erall l i aiedf tfil nF 1, c" to b ferred toas drive mechanism, and also includes jih el iric mo if n i a e a 49 in F 1, a the cable 4 6, 41 4.8 to transmit power from said electric motor 43 to the motor drive unit, gear box' or mechanism housing 25. The camera is also constructed for automatic operation and is provided with an electrical' circuit including a number of switches and is also provided with means for remotely controlling the camera with respect to the several diiierent types of operating cycles.

Referring' p'articularly to Figs. 6 and '7, Where- 'in is shown in great detail the structure of the ,powerdrive mechanism, and particularly referring first to Fig. 6, there is mounted on the motor drive unit, gear box or housing a large shouldered .stud 266 having an enlargeddiameter 261 and a head 268, and mounted on said enlarged diameter 261 is'adrive plate 269 having a hub 21!]. The said drive plate has a series of peripheral'n'otches21l; (shown in dottedlines, Fig. 7), which are engaged by the pins I18 (Figs. 6 and '7) of the said main drive or master gear I11.

aengtss attached to the hub 216 by a coining operation is an interrupted gear 212, the construction of which is best shown in Fig. 8, wherein three of the teeth on each side of the gear (that is, opposite each other) are cut away to fit the interrupted face of a second interrupted gear 213 which has teeth provided on only one half of its periphermthe balance of the periphery being cut down on a true radius to the pitch line of the g'ear 'Such a structure of interrupted gearing for providing intermittent motion is per se well known in the art and hence need not be more particularly described, but the application thereof to its present purpose is wholly novel.

The shouldered screw stud 265 is held to'the motordrive unit, gear box or housing 25 by a lock nutZ'I I and a locking Washer 215. The hub 218 and the interrupted gear '212 are free to "turn on the enlarged diameter 261 of the shoulder screw stud 266 and the said gea'r 21-2 i driven intermittently by the second interrupted gear 213 which is connected to a hub 216 by three through-pins 211, one of which is shown in Fig. 6, one end of each of said pins being riveted to "a driving ratchet member 218. The other end passes through a hole-in the interrupted gear 2'l3 and such gear is held to the hub 216 by-a screw 219 (Fig. 6). Thehub 2'16 rides i'n'a bushing 28D fitted into the inner wall 28I of the motor-driveunit housingo'r gear box25.

Aworm gear 282 '(sho'wnin side elevation "in Fig. 7) is free to rotate on the h'ub216 between the ratchet member 218 and athrustwasher 2-83, s'aidr'atchet member being held tothe hub 21 6 by screws 2%. Said jhub 216 is provided with a reduced diameter extension or hub poi-tion*285 'fre'e to turn in a bushing 286 fitted in'the gear box cover 28. The said worm gear 282 is provided with a'p'awl 281 (Fig. 7) held thereto by a -shoul- 40 der'rivet 288 and 'caused-toen'gage'the teeth of the saidrat'chet inemberor whee1 218 by a spring 289 held to the Worm gear-282 by a screW ZQIJ.

Referring to Figs. 6 and '7, there is attached to the interrupted gear 213a switch operating cam plate =2'9I held by means of three screws 292,

one of which'is shown in Fig. '1. The 'saidinterruptedgear213is provided with an elongated slot 283 (Fig. '1 t0 "provide asniall amount of adjustment of the 'cam plate 29I with respect to the interruptedgear fltf and under'eaeh screw head 292 is placed a washer 294.

The worm gearf282 meshes with a worm 285 carried by a shaft -296; 'one end whereof is free' to turn in "a bushing'ZQ'IQand-thG O posite end 'is provided'with a drive bushing or sleeve 298 free to-tur'n' in the cableconnecting bushing (shown 'in Figi 1) and threaded intothe wall of the mechanism drive 7 unit, housing or box 25, being locked thereto 'by alocking-screw 299 (Fig. 7). The said drivebus'hin'g orsleeve 298 is pinned-to the sha-ft 296' by a taper pin360,"the*worm2954spinned to the shaft 296 by a tape pin'3DIQ-and the left hand end "of 'the'said worm 295 is provided with a thrust washer 362.

The 'hub 285 is'prov ided with an interrial'threati 383 (shown in Fig. 6) affording meansior-conwise direction, the hub 216 and the interrupted gear 213 would remain stationary because of the provision of the ratchet 218 and the pawl 281. This provision is of a great importance, because if the camera were driven in a reverse direction, it would necessarily be seriously injured.

Referring particularly to Figs. 5, 6 and 7, the interrupted gear 213 carries a pin 304 (shown in full lines in Fig. 6 and in dotted lines in Fig. '7) for operating the shutter release at the proper time by transmitting motion from said pin 304 to the master shutter release lever I50 (shown in Fig. 2.and also in Fig. 6). There is provided an operating lever or link 305 (best shown in Figs. and 6) provided with a cam face 306 engaged by said pin 304, and as said pin turns in a clockwise direction it causes the operating lever or link 305 to be moved in a contraclockwise direction on a pin 301 threaded into a plate 308 and locked thereto by lock nut 309, said plate 308 being attached to one wall of the camera body by screws 3| 0 (Fig.7).

The operating lever or link 305 is provided with a cylindrical extension or pin 305a Figs. 2 and 6, which engages the slot I50a of the said master shutter release lever I50 .(Fig. 2). Thus each time that the interrupted gear 213 makes a revolution, the connecting lever r link 305 is caused to be turned in a contraclockwise direction, thus operating the master shutter release lever I50 in a clockwise direction, thereby causing the capping gates I32, I33 to be operated and the shutter curtain I29 to be released as previously set forth.

In Fig. '7 the said pin 304 (there shown in dotted lines) is in the position it occupies when the camera is at rest after having completed a cycle of functioning movements. As the motor is started, thereby turning the worm gear-282 in a clockwise direction viewing Fig. '7, the pin 304 will be moved in a clockwise direction, and it causes the operating lever or link 305 to be turned in a contraclockwise direction by reason of the cam formation 306, the upper end of which formation is of such shape as to cause a dwell in the operating movement of lever or link 305, so as to allow the shutter curtain to run down as the worm gear 282 continues to rotate in the exposure cycle of the camera. During such dwell the capping gates I32, I33 are held open. When the pin 304 reaches the upper end of the cam formation 306, the master shutter release lever I50 (Fig. 2) will be returned to its starting position in the manner previously set forth, thus closing said capping gates I32, I33 and allowing the idler gear I66 (Fig. 2) to mesh with the shutter rewind gear I65. The shutter curtain I29 will therefore now be rewound and an unexposed area of the sensitized material I20 will be moved before the exposure aperture. The said interrupted gear 213 makes one complete revolution per cycle and is then stopped by the act of breaking the electrical circuit to the driving motor 49. The manner of controlling the said circuit will now be described,

Referring particularly to Figs. 7 and 8, on the motor drive unit mechanism, housing or box is the switch box (previously referred to) and enclosed therein is a single-pole double-throw switch 3I I attached to the said switch box 30 by screws 3I2, 3I2. The said switch 3 is of itself a standard switch of well known manufacture, and per se is therefore not a novel element in the present invention. It will, however, be specifically .described and, as will appear, the said switch combines in a novel manner with operating parts herein disclosed in carrying out the purposes of the present invention, and is an element of novel combinations herein disclosed.

Attached to the base of the said switch (H I is a flat actuating spring 3I3 and a contact spring 3I4, and connecting said two springs is a. semicircular spring 3I5. The contact spring 3I4 is caused to be moved between contacts 3I6 and 3I1 (shown in Figs. 7 and 8) when the switch 3 is operated. The contact spring 3| 4 carries a contact 3 I8. When a switch plug 3I9 therein shown is moved in a left-hand direction, viewing Fig. '1, the spring 3 I4 is also moved in a left-hand direction, carrying with it the semicircular spring 3I5 until the end of the spring 3I3 passes the spring 3I4, which is provided with an opening for that purpose, thus changing the position of spring 3I5 so that a center line would be projected through the end of the spring 3I3 and spring 314 at the point at which the said semicircular spring 3I5 is connected. At this time the actuating spring 3I3 will be moved to the left of contact spring 3I4 and at the same instant said contact spring 3I4 will be caused to be moved to the right under the influence of spring 3I5, as most clearly shown in Fig. 8.

When pressure is released fromthe switch button 3I9 and the spring 3I3 is allowed to assume the position shown in Fig. 7, the said contact spring 3I4 will be caused to be moved to the left by the action of the semicircular spring 3I5 in a manner that need not be more fully described.

Referring to Figs. 7 and 8, in order to operate the switch 3| I, we have provided as an important feature of the invention an operating rod 320 that passes through the wall of the motor drive unit, gear housing or box 25 and the wall of the switch box 30, and have provided on its left end an enlarged head 32I for engaging with a spring 322, the purpose whereof is to cause said switch actuating rod 320 to follow the contour of the cam plate 29L As the said rod 320 is moved to the left, the switch operating button 3I9 is consequently moved to the left, causing the contact arm of the switch 3II to be moved to the right, as shown in Fig. 8.

The cam plate 29I is provided with a cut-away section or indentation 323 (most clearly shown in Fig. 7) to allow the rod 320 to move to the right when the said indentation is in alignment with said rod. In Fig. 7, the said interrupted gear 213 has made a complete revolution and the said cam indentation 323 has reached the position shown in Fig. 7, thus allowing the switch to be operated, thereby opening the electrical circuit to the motor and causing the camera to be stopped in this position, meaning that all functioning movements cease until a new cycle begins.

The camera mechanism will therefore be in the condition shown in Fig. 2, the capping gates I32, I33 being closed, the shutter curtain I29 being rewound and the take-up spool I25 being in the stopped position.

If now the circuit be completed between the contact spring 3I4 and the contact 316 by means of a. second switch, the motor will again be set in operation to begin a new cycle, turning the interrupted gear 213 in a clockwise direction, and as soon as the indentation 323 of the cam .plate 29I passes the push rod 320, the switch 3II will be operated and will be in the condition shown in Fig. 8. The auxiliary circuit just referred to can now be broken, but the camera will continue to operate until the indentation 323.

will; have been completed; It will, be underoo from. th fore o n t at; the nterrupted gear 213 will have. made a complete. cycle. to cause the functioning parts to operate, by. first O ra g e a p n a es 1,-3.2, 33. thro h the action ofthe pin 353d moving the link- 3,05 and; operating the master shutter-release, lever I 50; The said capping gates I32, I33; will during such cyclobe opened and the idler gear I56 will be disengaged from the shutter rewind gear I 65 (Fig. 2) and the; shutterlatch or subsidiary release lever 193 will; bemoved upwardly,- thereby disengaging the dog I9 8: from the notch I92 ofthe: shutter release cam I9I' and the shutter curtain I29 will run down during 511C115 cycle.

The interrupted gear 2 'I2 has not yet operated b t, n e eet o h nter up e ear 213 reachtheteeth of the gear 2;I2, such latter gear will turnthrough 18Q-. However, before the teeth of interrupted gear 2'13; reach the teeth, of interruptedgear 272-, thegpin 304 (Fig. 6,) will have left the cam face 366'. of the shutter operating link 3B5, allowing the capping gates I32, I33 to. closeand again engage the teeth ofgear I65 with the teeth of the shutter rewind gear W5. When said interrupted gear 212 has turned through such one-half. revolution, the interrupted portion of gear 213; will have reached the; position of; the cut-away teeth on gear 212 The, cle. is now. c mp e d and err p d ear 212 will now cease from turning in eitherdirec-. tionu t e u ted ear.- 213,- m es nothe cycle.

Referring now to Figs, 7 and 8, theswitch 3 is; provided with conductors, leading through: the. camera housing; wall as follows. Contact all is provided with a conductor 38?, contact 316 is provided with a conductor 3 88, and switch contact arm aid is provided with a conductor 3 89-. To conduct the circuit through the camera body 2;0- and yet provide. ready means for disconneeting or removing the motor; drive from the camera, we provide suitable binding posts, one for a hpithe nducto .8 and 3.8 ,,unneo essary' further torefer to.

The condition of the camera mechanism at the time of closing contacts will. be thatindicated in Fig, 2. The shutter curtain I29. therefore has been rewound, a new area of film has been fed into position and the camera will. have stopped, themotor drive mechanismbeing in the condition shown in Fig. 7. As contact is made through the main controlling switch, the motor will start to. operate, turning the worm 295 and the worm gear 282, interrupted gear 213, cam plate 21- and pin 304. Asworm gear 282 continues to turn, the switch operating rod 320 will be caused to move to the left, viewing Figs. 7 and 8, thus closing contacts 3|.6: and 3-I8. The circuits can nowbe interrupted by the main controlling switch,

since contacts SIB and 3I8 will short circuit said controlling switch, thus allowing the motor to operate continually until the circuit isbrokenby contacts titand 318 or by a gate controlling switch, which does not function during the day cycle. Therefore, the camera will continue to operate, and the pin 304 operates the shutter operating link 3135 and the master shutter release lever its, thus opening the camera capping gates L32, I33, and at this time the shutter will also be released.

At the time the shutter curtain l29= is released, the interrupted portion of said gear 213 willbe inmesh with cut-away teeth of the gear 212-, but

aeain eachestne push; rod 32;! when; the cyc ethe. camera. mechanism as: ot. yeta tarte a to,

pe at A. tinua ceofi rotati n i sa d; ear

Z'EEwill allow the cappingates 132; I33 toiclose Shortly thereafter the teeth of said interrupted. gear 2T3- then, engage teeth ofgear 27% causing said gear 2'lI-2;to be turned, operatingthe camera,

mechanism so as to rewindgthe shutter curtain I29 and feed a new area of film into position for the next exposure. tinue to operate until. the. cut-away portion 323; of the cam plate 29I reaches theswitch operating rod 320. The circuit between contacts. 358 and 316 will then be broken, thus stopping themotor and causing the camera also tobe. stopped, and

the mechanism will now again be. in position shown. in Figs. 2 and 7.

The lever Hill corresponds to the so-called trigger or shutter release lever 40 of the said co.-. pending application Ser. No, 437,240, and there fore herein it is termed the master'shutter-re-.- lease lever.

tinguish it from the master shutter-release lever- ISB; we have herein termed the secondary shutter release lever, it acting to release the shutter when the capping gates I32, I33. approach their full open position. The said secondary shutterrelease lever I59 is operatively connected, as clearly shown in the drawings, to the said master shutter-release lever I50 that is operated by the said motor-drive unit.

In the specification, we have referred to the camera, because of the herein disclosed shutter construction, as one adapted for use as a daytime camera, and also adapted for use in night photography, at which time the subject to be photographed would be illuminated as known to those skilled in the art,by flash bombs or other illumination under the control of the personnel in the aeroplane or by automatic control pro- 7 videdin the camera but not herein disclosed. The term night photography has come into general use in aeroplanes, and it is well understood what is meant by such term. We have, ther for u ed the x s on night p eaphy i that se s e ein.

Having thus described one embodiment of the invention, it is to be understood that although specific terms are employed, they are used in a ner c an des t en n not o p poses of limitation, the scope of the invention being set forth in the following terms,

We claim 1- Mot r actuat d y n mean f we related focal-plane shutter-curtain release means and pivoted, swinging capping-gate controlling mean a l e ta ng. to o raphi t er mechanism, nc ud in om ina on; a camera casing, a focal plane shutter curtain I29 in said casing, an electric motor supported adjacent but exterior to said camera casing, a Worm 295 supported in the camera casing and operatively connected to and driven by said motor, a worm gear 232 in said casing meshing with and driven by said worm, a gear 21? driven by said worm gear, a cam plate 2?! i, said gear 213 and said cam plate being co-axial and carried by said worm gear,

- said cam plate having a pin 304 extending from a lateral face thereof, a lever 305' pivotally mounted in the camera casing in position to be engaged and moved by said pin 304, said lever 3 015 having a protruding pin 305a, a master shutter release lever I50- mounted in the camera cas- Said worm gear 282: will con.-v

ing and having a formation engaged by said pin 305a, the 'proportioning and timing of said parts being such that one revolution of said gear 213 causes said lever 305 to operate the said master release lever I50; capping gates I32, I33 pivotally mounted for opening and closing swinging movement in the camera casing in close proximity to and in parallelism, when closed, with the said focal plane shutter curtain I29, operating links I520, and I55 extending from said capping gates respectively, a pin I58 operatively connected to the said link of the capping gate I33, an actuating disk I41 carrying said pin I58, and a gear I48 operatively connected to and adapted to move said links I52a and I55 to open and close said capping gates, a gear I49 meshing with gear I48 and carrying the said master shutter release lever I50, a secondary shutter release lever I59, a shaft 202 whereon said secondary releaselever is mounted for releasing the said shutter curtain I29 and permitting it to run down when the said capping gates approach in their swinging movement full-open position and having a formation to engage the said pin I58, a shutter rewind gear I65 having a shutter release cam plate I 9| fast therewith in a substantially concentric relation thereto, a subsidiary shutter release lever I93 having a formation to engage said shutter release cam plate I9I, a lever 204 mounted on said shaft 202 and a gear-releasing link 208 operated by the said lever 204 and acting through the described connections to operate the subsidiary re- I lease lever I93, thereby releasing the shutter curtain I29 and thus permitting it to run down.

2. Motor actuated cycling means for co-related focal-plane shutter-curtain release means and pivoted, swinging capping-gate controlling means, all pertaining to photographic shutter mechanism, including, in combination: a camera casing, a focal plane shutter curtain in said casing, an electric motor, a worm 295 in the camera casing operatively connected to said motor, a worm gear 282 in said casing and meshing with and driven by worm 295, a cam plate 29I coaxial with and carried by said worm gear 282 and having a pin 304 laterally extending therefrom, a lever 305 pivoted in said camera casing and adapted to be engaged and moved by said pin 304, a master shutter release lever I 50 in the camera casing and having a formation to be engaged by said lever 305, capping gates I32, I33 pivoted in the camera casing close to and parallel, when closed, with said shutter curtain, means to open and to close said capping gates in timed relation to the movement of the shutter release lever I50, a shutter rewind gear I05 in the camera casing, a shutter release cam plate I9I fast with said shuter rewind gear I65, a subsidiary shutter release lever I93 engaging said cam plate I9! and a lever 208 moved by movement of said master shuter release lever I50 to release the shutter curtain by withdrawing said release lever I93 from the cam plate ISI.

3. Motor actuated cycling means for co-related focal-plan shutter-curtain release means and pivoted, swinging capping-gate controlling means, all pertaining to photographic shutter mechanism, including, in combination: a camera casing, a focal plane shutter curtain I29 in said casing, an electric motor, a worm 295 in the camera casing operatively connected to said motor, a worm gear 282 in said casing and meshing with and driven by worm 295, a cam plate 29I carried by said worm gear 282 and having a pin 304 extending laterally therefrom, a lever 305 pivoted in the camera casing and adapted to be engaged and moved by said pin 304, a master shutter release lever I in the camera casing and having a formation to be engaged by said lever 305, capping gates I32, I33 pivoted in the camera casing close to and parallel, when closed, with the shutter curtain I29, operating links I52a and I55 extending from said capping gates, means to operate said links to open and close said caflping gates and including a gear I49 carrying said release lever I50, a shutter rewind gear I65, a shutter release cam plate I9I concentric and fast with said shuter rewind gear I65, a subsidiary shutter release lever I93 engaging the cam plate I9I, and shutter rewind gear releasing means 208 moved by movement of said master shutter release lever I50 to release the shutter curtain I29 by withdrawing said release lever I93 from said cam plate I9I.

4. Motor actuated cycling means for co-related focal-plane shutter-curtain release means and pivoted, swinging capping-gate controlling means, all pertaining to photographic shutter mechanism, including, in combination: a camera casing, a focal plane shutter curtain I29 in said casing, an electric motor, a worm 295 in the camera casing operatively connected to said motor, a worm gear 282 in said casing and meshing with and driven by worm 295, a cam plate 29I carried by said worm gear 282 and having a pin 304 extending laterally therefrom, a lever 305 pivoted in the camera casing and adapted to be engaged and moved by said pin 304, a master shutter release lever I50 in the camera casing and having a formation to be engaged by said lever 305, capping gates I32, I33 pivoted in the camera casing close to and parallel, when closed, with the shutter curtain I 29, a gear I49 operatively connected with said capping gates to operate them and carrying the said release lever I50, a shutter rewind gear I65, a shutter release cam plate I9I fast with said gear I65, a subsidiary shutter release lever I93 engaging said cam plate I9I and shutter rewind gear releasing means 208 moved by movement of said master shutter release lever I50 to release the shutter curtain I29 by withdrawing said release lever I93 from said cam plate ISI.

5. Motor actuated cycling means for co-related focal-plane shutter-curtain release means and pivoted, swinging capping-gate controlling means, all pertaining to photographic shutter mechanism, including, in combination: a camera casing, a focal plane shutter curtain I29 in said casing, an electric motor, a cam plate 25 operatively connected to and turned by said motor, said cam plate having a pin 304 extending laterally therefrom, a lever 305 pivoted in the camera casing and adapted to be engaged and moved by said pin 304, a master shutter release lever I50 in the camera casing and having a formation to be engaged by said lever 305, capping gates I32, I 33 pivoted in the camera casing close to and parallel, when closed, with the shutter curtain I29, operating links I52a and I55 extending from said capping gates, means to operate said links including a gear I48 and a gear I49 meshing therewith and carrying said release lever I50, a shutter rewind gear IE5, a shutter release cam plate I9I concentric and fast with said shutter rewind gear I65, a subsidiary shutter release lever I 93 engaging said cam plate I9I, a lever 204 operatively connected to said gears I48 and I49, a shaft 202 whereon said lever 204 is mounted, and shutter rewind gear releasing means 208 moved by movement of said master shutter release lever 5523 through said "lever 2% to release the shutter'curtain 1Z9 by withdrawing said release lever 193 frqmsaid. 'camplate 1'9 l 6. combination in accordance with claim 2, but whereindriven by said motor for-the 'purpose of rewinding the focal plane shutter and operating the master-shutterrelease lever' in timed relationto the-closing o'f'the 'eapping gates,'there are provided a pair o'f adjacent meshing gears 21!, 2=13= and a master gear |111drivenby said gears 212, 21-3 and in dri-ving relation with the controlling electric switch '3 is adapted to be moved by the said pm 320 -"for stopping said motor.

*8. A combination in accordance with claim '2, but wherein there is provided between theelectric motor andthe shutter curtain'release means, =forzthe purpose-of rewinding t-he shutter curtain and operating the release means therefor, operative connections including *a "main drive or master gear 151-! in driving relation with the said shutter rewind gear I65, and apa'ir of meshing gears 212, 273 in train=with said master gear I 11, the gear 212 having interrup'ted teeth at two'diametrically opposite points and the gear 213 being devoid of teeth throughout substantially onehalf its periphery, the proportioningof saidparts being such that one revolution of said gear "-213 causes said lever 365130 operate the master "release lever B once for releasing the shutter curtain.

9. A combination in accordancewith claim '2, but wherein thelever 385 has 9, dwell-producing cam formation 386 shaped to cause a dwell in the operating movement of lever 305 during the running down of the shutter curtain, so as to allow the said shutter curtain to run down as the worm gear 'ZBZcontinueS-to rotate in the exposure cycle of the camera, and during which dwell resulting from said cam formation the capping gates 1'32, 1-33 are held open to permit purpose ,of :rewinding the focal plane shutter and operating the master shutter release lever in timed relation to the closing of .the capping :egemrses gates, there is provided :a gear 212 having teeth diametrically opposite each :other cut away,

and wherein there is ia;gear121.3 having 58.11 inter- :rupted face throughout one-half its periphery to fit the cut awayteeth'of 'gear 212, said gear .212 being thereby driven intermittently by .said gear 2213,. an'dwherein there is "a driving: ratchet .mem-

her 218 connected by:its shaft to said gear .213

:and a-pawl 281 mountedonthesaid worm gear 282 and engaging said'ratchet gear.

12. Acombinationrin2accordance with claim 2,

but wherein, driven by'said motor and ffor :the ipui'pose :of rewindingithe fo'caliplane shutter and operating the master shutter "release lever in timed relation to the:closing;of.the capping gates, V :and in order to .providelintermittent motion from :the electricimoltor,tthere ..is provided a gear L212 having :a short-series of teeth :cut away opposite 213.;Motor :aetuated :cycling means for .00- related focal-iplane shutter-curtain release -means,;inc1u'ding, 'in combination, .a, camera-cas- 'iin'g, atfooal plane.shuttercurtain 129 in said casing, an electric motor supported :adjacent but exterior to-said camera casing, a worm 295'supported .in thecamera casing. and operatively 'connested to-and drivenfby'said motor, a worm gear 282 in said :casing andimeshing with and driven by said worm .295, a main .drive or :master gear i 11 for rewinding the .said shutter curtain, a pair oftmeshinggears .212, 213Iin train withsaid master gear 111, .said "gear 212 having interrupted teethatxtwo diametrically opposite points of its periphery :and said gear 213 being devoid of teeththroug'hout substantially one-half of its periphery, 'a cam plate 29! ico-axialwith the said worm gear 232 .and with saidigear 1213 and .turning therewith, alever 3115 pivoted in thec-amera casing in position to be periodically swung upon its pivot by :said pcam plate :29] in the turning movement of the latter, a master shutter release lever H59 .in the camera :casing positioned to be moved by the movement :of said lever 305, the construction and relation of the said parts being such that one revolution of the said gear 213 causes said lever 3B5 to-operate the master shutter release lever l for releasing the shutter curtain, a shutter rewind gear H in a driving relation with the main drive or master gear I11, a shutter releasecam plate 19! concentric and fast with said gear I65, and a lever .93 having means to engage and hold said cam plate 19! and said shutter rewind gear 165 from rotative movement, and operative connections between said master shutter release lever I50 and said holding lever let to cause each shutter releasing movement of said release lever I50, through said operative connections, to withdraw said lever .193 from the shutter release cam plate IBI .and permit the shutter curtain to run down.

:ARCHIE H. GOREY. LOUIS D. NADEL. .REYNOLD J. NITSCH.

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