Патент USA US2126302код для вставки
Aug. 9, 1938.- >www A. Yonne. JR /_ 2,126,302 PHOTOGRAPHÍC SHUTTER C_OANTROL Filed Oct. 21, 1936 > l 5049 2 Sheets-Sheet 1 FIG'.1 48\)1 46, " FIGJZ. INVENTOR. ' D’Arcy-Allf’gungJn mè“ max/Mq ATTORNEYS Aug. 9,1938. D'ARCY A. YOUNG. JR 2,126,302 PHOTOGRAPHIFC 'SHUTTER CONTROL ' 49 Filed oct, 21, 1956 - ` " IT ' F 5.9 ¿£861 ' 56 ï-ï n .46445.> 4 ‘ 'I yg- m., 1 _l f1 .l . 63 8 10 57456 .9162 FIG.7. 2 43 47 I è.; 77"--u-~ . G45> gg _44 42aj42 2ï ' 48 v „1l-_' ï ï45 5o v2 sheets-sheet 2 ' Y E; _ ' __. Patented-Aug. 9, 193s 'v » 2,126,302 PATENT oFElc ` f UNITED STATES 2&126’302 ‘ ' ' PHOTOGRAPHIC SHUTTER CONTROL D’Aroy A. Young', Jr., Rochester, N. Y., assignor to ' Eastman Kodak Company, RochestenN. Y., a corporation of New Jersey Application October 21, 1936, serial No. 166,831 9 Claims. This invention relates to photography and more (ci. eas-57) Figure 2 is a front elevation of Figure l with particularly to photographic shutters. A'One object of my invention is to provide a photographic parts being shown in section; ’ . Figure 3 is a vertical section on the line 3-3 shutter in which shutter members are adapted 5 to cover and uncover an exposure aperture, and of Figure 2; in which separate power springs are used to drive the shutter members positively'to both open and close the exposure aperture. Another ob of Figure 2; ' Figure 4 is a fragmentary section on line 4--ß 5 ' - . Figure `il is a top plan of the speed4 scale and index; . Figure 6 is an enlarged plan view of the speed ject oi my invention is to provide a shutter with . 1o separate power drives for opening and closing the shutter, and to provide a means for determining selector mechanism; y, i Figure 7 is a perspective view of the speed the duration oí exposure by a timing mechanism, ` permitting one spring to function in advance of ‘ selector stops and other adjacent parts “ex ploded”; the other. Still another ‘object of my invention is to provide a shutter structure in which a timing Figure 6; Figure d is a detail section on line d--B of _ Figure 6; which can be regulated. Another object of my Figure 6, and sisting oi a plurality oi protuberances rotating gaged by a trip mechanism for controlling the time ci’ a shutter exposure. Another object of 25 my invention is to provide a shutter of the cur tain type in which two shutter members may be driven by two springs, and in which mechanism is included for permitting the operation of one spring in advance of the operation ci the other` 30 spring. .another object of my invention is to _ ff" . Figure ‘10'is a detail section on line lil-_4d of . _ Figure l1 is a perspect've view'of a modified 20 '20 invention is to provide a control mechanism vcon in timed relation, any one of which may loe en to Figure 9 is a detail section on line 'il-9 of mechanism for controlling the relative'operation of _two power springs consists of a lost motion connection, _the duration of the lost motion of _ detail. , y ‘ ' ’ -« ' One of the chief features of my invention is the- control mechanism 'which is interposcd'be tween two latches controlling two power drives, .one ‘drive being adapted to move -the shutter 25 members so that the exposure aperture will ‘oe opened, and the other drive being adapted to move the shutter members so that the xposure, aperture will be closed. Thus, l prefer to use -two springs, one for opening the shutter and the 3_0 provide a curtain shutter with a means for ' other for closing the shutter, and l prefer to vary simultaneously setting two power springs and the timing of these two springs by a lost mo with a means :for tripping said springs one after the other. Still another object or my invention A35 is to provide a means forvarying the time of exposure through a lost motion connection corn prising a series of rotatable toothed disks, and »to provide a means for cooperating with these adapted to trip the shutter closing spring, and 40 other objects will appear from the following specification, the novelv features being particu iarly pointed out in the claims at the end thereof. As one form oi my invention l have illustrated a shutter which has been constructed for use 45 with stereo cameras in which a pair of objectives are used. However, while the illustrations show a preferred embodiment of my invention in which two shutters are used side by side, my invention '50 is equally useful for a single shutter and camera employing only the more common single objec tive, since exactly the same control device _is used 55 tion connection, the duration of which can be altered at will. ‘ In the illustrated embodiment of my inven- 35` tion the shutter members may conveniently be curtains which are commonly used in the so called focal plane type of shutters. _ Since I have shown a shutter housing contain ing two shutters and two exposure apertures, I 40 wish to point out that the following description refers to one shutter only, except where other wise specifically stated. »The two shutter struc tures are identical and a _description of one will be sufficient for both and is preferable because I 45 also contemplate making a single shutter with exactly the same control mechanism which is illustrated and which, inthe present embodiment of my invention,l is used for both shutters. It is, of course, necessary in stereo shutters to have 50 both give exactly the same exposure. The operating mechanism of the __shutter Iis for one shutter as is used for the doubleshutter shown enclosed within a housing or case 20 hav in the embodiment illustrated herein. ing a baclr'ZI and top and bottom walls 22 and 23', respectively, and end walls 24 and 25. Means, not 55_ ' Figure 1 is a plan view, partially in section; 2 2,128,302 illustrated, are provided for mounting the case in or on a camera, and when mounted, the back 2lA is preferably close to the focal plane. Apertures 2O in the back 2| are located in the required positions and concentric with“ the twin lenses. 'I‘he latter are not shown in the drawings, their positions being merely indicated by broken-line circles at 21. - , 'I‘hecurtains of the shutter are arranged in 10 duplicate to cover the apertures 28 and to pass across said apertures in unison when being wound and when released. The duplicate curtains are front curtain 28, releasing the latter at a prese lected interval after the curtain 3i has started downward to uncover the exposure aperture 2l. One element of said means comprises a hooked trip lever 6U that fits and is slidable on a flattened,Í 5 portion Il of shaft 43, although this is a detail of construction that may be modified, and might, for instance, be a spline key or groove and tongue. The trip lever in is slotted at 62 on the upper side of its hub portion, and a pin $3 depending from a crankA arm 64 projects into said slot. The arm B4 is connected to an opposítely extending arm 65, both arms being supported by a bearing 66 so preferably spaced apart suiliciently to afford room for the timing selector, which in the draw A they may be swung in a. plane parallel to shaft 42. ings is designated broadly bythe letter “S". In To accomplish this movement and to causethe the following description of the curtains the op lever Gli to assume selected positions, a pin 61 on eration of one applies also to the other, and the the arm 65 engages a cam slot 68 in a disc 6! that various corresponding parts of the duplicate as is close to the top of casing 20. A stub shaft 10, to semblies bear the same reference numerals. which said disc is attached, extends through the 20 'I'he front curtain 2l is wound on a. roller 28l casing to a selector knob 1I (Figs. 1 and 5)~ which and on a spring-actuated return roller> 3l. This carries an index pointer 12 that overlies a circu curtain has an aperture 2la. of the same dimen lar time scale 13. When the knob 1l is turned sions as aperture 26 in the back wall 2i. The to align the index 12 with the selected shutter rear curtain 3| is wound on a spring-actuated speed on the scale 13, the cam slot 88 engages the pin 51 and swings the arms 65 and 64' about 25 the bearing center 66, and the pin B3 moves trip ‘ tapes 32 which are attached to and wound on lever G0 toward the right or left end of shaft 43. drums I4 and 34a, which are fixed to shaftv 35 ' As before mentioned, lever 60 is arranged to lift on which roller 2l is freely revoluble. The tapes or turn with shaft 43, as is also detent 42 which 30 also pass over an idler roll 33a. holds iront curtain 28 in “wound” position by T'he shaft 35 ,carries a pinion 26 that meshes engaging shoulder 44 on the end flange 45 of roller with'a gear 31 attached to Áa winding knob Il. 29. Therefore, if the trip lever 60 is raised a re When the latter is rotated in the direction indi quired distance, the shaft 43 is rotated sufiiciently cated in Fig. 2, the shaft 35 turns the drums 34 to lift the hooked end of detent 42 over shoulder 35 and 34a and begins to wind up the rear curtain 3i 44 on flange 45 of roller 29, and the front curtain by means of the tapes 33. The drum 34 carries a will be released. I‘ roller 32 below and in front of the roller I0, and the upper portion of this curtain terminates in lug 3l that strikes a similar lug 4l on the roller 2f To provide the required variable “lead” of the. after the drum 34 has turned a small part of on'e rear curtain in advance of the beginning of the rcvolution,`or a distance sufficient to carry the downward movement of the front curtain, a series 40 upper edge of curtain 3| past the upper edge of of detent actuators are provided to lift the de aperture 25a in the front curtain.> Further wind . pending end of trip lever 60 at the required time. Á ing of the knob completes the movement of both 'I'hese actuators consist of lugs projecting from curtains to the “set” position, indicated in Fig. 3. In this position .both the roller 2l and the drums 45 I4 and 54a are urged toward the direction oppo site to the arrows in Fig.> 2, by torsional coil springs within the rollers ll and 32,> as shown at 4I in Figs. 2 and 3. The curtains are held in the wound or set position by a latch 42 (Fig. 6) mounted on a'shaft 43, and which engages a shoulder 44 on the end flange 45 of roller 29. The shaft 4I and a parallel shaft 4I near the back of the casing 2l carry a series of detents in the form of arms or hooks, some of which are 55 free on these shafts and 'some fixed thereto, as will be described. Shaft 43, hereinafter desig nated as the detent shaft, is supported on bearings 41, while the shaft 42, or release shaft, may be turned in bearings 4l by downward movement of a release lever 4I that is fixed to said shaft, against the action of a spring 5l. On the detent shaft 4I and free to turn thereon, is a detent 5I, thehooked rnd 52 of which drops into a notch 52 in the'end flange 54 of drum 34a, 65 to retain the rear curtain in “wound"V position (Fig. l0). An extension 5_5 on the detent 5I projects into the path of an arm I8 which is fixed to shaft 44, so that when the lever 49 is depressed, the arms 5l will raiseA the detent 5I and free the 70 hook l2 from the notch l2, thereby permitting the rear curtain Il to be returned to the "un wound" position of Pig. 11. the edges of discs `1li, 16, 11, 18 and 19 that are free to revolve on shaft 35 and which lie between one drum 34a on said shaft and a fixed bearing 80 that serves as a guide for one of the tapes 33 in place of a flange on one drum 34a. 'I‘he lug 15a on disc 15 projects laterally into notch 53 in flange 54, so that when fthe hook 52 is'raised out of said notch by the movement of release lever 49 and arm 56, the rotation of drum 54a carries disc 15 around with it. Lug 16a on disc 16 projects into the path of lug 15a, so that after the latter has moved through several de grees of arc the disc 16 begins to turn. Likewise in succession discs 11, 18 and 19‘ are picked up by the lugs 11a, 18a and 19a of the remaining discs. Anyone of‘the lugs 15a-19a is adapted to contact the underside of the“ hooked portion of trip lever 60 and to raise it, thus turning 00 the detent shaft 43, which latter, in turning, raises the detent 42 which is fixed to it and releases the front curtain. The _time interval between the release of the rear `and front cur-` tains is determined by the position ,of =trip lever il, and the further to the right (Fig. l) this detent is, the greater will .be the time interval or the wider the shutter “slot,” due to the «cumulative "pickup” of the selector discs 15-1l. On the winding movement of the shutter, the discs 15--19 are circumferentially spaced in given .Means are presently to be described whereby relative positions by successive engagement, first, a “slot” may be formedl between the`upper edge of the lug 15a by the following edge of notch 52, 75 of the rear curtain Il and the lower edge of the Athen engagement of lug lla by a lug 15b on 75 3 2,126,802 the control for the two curtains forming one I -disc 16, then engagement of lug Ífila by lug 16h, etc. ~ l shutter are exactly the same. ' Tol permit “bulb” exposures to be made, it is necessary to release the rear curtain and per. ` Iv claim:` . ' ~ . ` 1. Inra photographic shutter, the combination, with Va casing including exposure' aperture mit it to'be wound on roller 32, thus fully un covering apertures 26, and then'to release the <,therein, of shutter members adapted to cover front curtain after the desired exposure inter and uncover said exposure apertures, two springs . val, as- determined manually by the operator, connected to the shutter members one for open that is, the operator may depress lever 49, which ing the exposure aperture and the other for closing the aperture, a control device'including 10' 10 frees the rear curtain, and when the> lever is permitted to return to normal under the in two latch members adapted to hold the springs iluence of spring 50, the front curtain will be ' inactive, a tripping device for releasing one released. latch, a lost motion connection between the first ' „ Means for accomplishing this _result comprise 15 a “bulb” detent 85, the hooked end- 85a of which is adapted to engage a shoulder` 86 in the _disc 18, this disc being thicker than the others to af ford room for said _\shoulder. Detent 85 is normally freed from »the shoulder 8,6 `by a light 20 sprin'g 81, although in- Fig. 9 it is shown in en gagement with said shoulder. This engagement is accomplished by means of a block 88, slide able on release shaft 46 and arranged to turn with said shaft, and having a ñat extension 89 25 that is adapted to lie close to the back of detent 85 (Fig. 9) when the block is slid'to the position of Fig. 6. ' . f ' - The latter movement occursA at n’the extreme end of the counter-clockwise rotation of selector knob ‘il >(Fig. 5), at which point a downwardly z _projecting lug 90 on cam disc 69 contacts an upstanding lug 88a on the block 88, moving the latter towardthe left (Fig. 6). When're-= >leased shaft i6 is turned by depressing lever 35 49, the extension 89 swings detent 85 so'that the hook 85a bears against the disc 18, and, connected to the shutter members one for open ing the exposure' aperture and the other for 30 closing the aperture, a control device including two latch members adapted to hold the springs \ inactive, a tripping device forreleasing one latch, 'a lost motion connection between the first,and second latches, said -lost motion device compris 35 ing a. plurality of revolvably mounted washers each having interengaging lugs whereby-one may picking of discs l5, 16, and 11, the hook 85a be turned by another when the lugs are brought vinto contact, at least some of the‘washers be engages shoulder 86. ` ' is thus prevented, andÍ as the rear curtainy at this time has moved far enough to uncover aperture 26, the latter remains uncovered until lever 49 is released. 50 and uncover said exposure apertures, two Springs ` when the> latter has been carried >around by the 40 , Further rotation of the series of selector vdiscs 45 and second latches, said lost motion device com prising a plurality of revolvably mounted Washers 15 each having interengaging lugs whereby one may be turned by another when thelugs are brought into contact, at least some of the washers being provided with tripping lugs, a trip lever adapted to be operated by a tripping lug, and connections 20 between the tripping lever and second latch for ‘operating the latter bythe former whereby one spring is operated after the other so that -the shutter members are positively opened and closed. 2. In a photographic shutter, the combination, 25 with a casing including exposure aperture therein, of shutter members adapted toA cover . This release movement permits shaft 46 to turn under the influence ofv spring 50, and to swing hook> 85a away from shoulder 86. The rear curtain 3i then continues its movement under the influence of its spring 4I, thev disc 'i8 rotates, lug '58a strikes lug 19a, and the,l lat ter raises the trip `lever 68 and detent 42, thus permitting the front curtain 28 to bewound- ing provided with'tripping lugs, a trip lever 40 adapted to be operated by a tripping lug, and connections between the tripping lever and sec ond latch for operating the latter by the former » whereby one spring is operated after the other vso that the shutter members are positively 45 opened and closed, and a movable mount for the tripping lever on which the lever may be moved to engage a selected tripping lugto vary the duration of the -lost motion between the actua tion of the two springs. ' 3. în a‘photographie shutter, the combination, on roller 3|! and to again cover aperture 26. with a casing including exposure aperture there in, of shutter members adapted to cover and ` In Fig. l1 a modiñed form of selector discs 55 are shown, wherein the various lugs that are uncover said exposure apertures, two springs adapted to strike and lift detent 68 are on‘a se 50 connected to the shutter members one for open 55 ing the exposure aperture and the other for ries'of discs Q5, 96, Si', 98, 9.9, that are pinned closing the aperture, a control device including two latch members adapted to hold the springs inactive, a tripping device for releasing one latch, requires the roller> 29 to be of such a diameter > a lost motion connection between the first and 60 that one complete revolution thereof will be suffi second latches, said lost motion device compris at ili?‘ to the 'drum 34a so that the drum and disc are in eiïect integral. This modification eo cient to move any: of the lugs on the cylinder from the “wound” position up to and into con tact with the hooked lever 60. Each of the two 65 shutters are identical as to their operation and they are both under the control vof a single releasing and turning device. y ~ - .While 1_ have described> a preferred embodi-v 70 ment ofA my invention as applied‘to a duplex shutter for stereo cameras, it is obviously not limited to .such 'an- embodiment being equally >useful for the more usual type of cameras utiliz ing a single objective. In such cases one of 75 the shutters may be omitted, but in either case g ing a plurality of revolvably mounted washers „ each having interengaging lugs whereby one may be turned by another when the lugs are brought into`\ ontact, at least some of the washers being 65 pro ded with tripping lugs, a trip lever adapted to be operated by a tripping lug, and connections between the tripping lever and/second latch for operating the latter by the former whereby one springY is operated after the other so that the 70 shutter members are positively opened and closed, a movable mount for the tripping lever, _ means outside of the shutter casing for mov -ing the tripping lever into position to engage 75 4 a ‘selected tripping lug whereby the time of ex posure may be predetermined. ently of the other a predetermined distance and _ then may turn with the next washer, and means engaging a radial lug of any one of the plural 4. In a photographic shutter, the combination, with a casing including exposure aperture there in. of shutter members adapted to cover and uncover `said exposure apertures, two springs connected to the shutter members one for open ing the exposure aperture and the other, for closing the aperture, a control device including two latch members adapted to hold the springs 7. A timing device for shutters including shut ter mechanism for opening and closing a shutter aperture and comprising two springs, one for Aopening the shutter mechanism and the other for closing the shutter> mechanism, latches for ity of washers for timing the tripping of the second latch to complete the exposure. _ inactive, a tripping device for releasing one _holding the springs against movement, and a latch, a lost motion connection between the first and second latches, said lost motion device com lost motion connection~ for controlling the rela tive operation of the latches, means for trip prising a plurality of revolvably mounted wash ping one latch manually, said lost' motion con nection comprising a shaft, a plurality of lugs 15 ers each having interengaglng lugs whereby one may be turned by another when the lugs are brought into contact, at least some of the wash extending radially of the shaft, one of said lugs being adapted to turn therewith, said shaft be ing connected to and controlling the shutter opening spring, a movable member adapted to ers being provided _with tripping lugs, a trip lever adapted to be operated by a tripping lug, 20 and connections between the tripping lever and engage a selected lug, connections between the 20 second latch for operating the latter by the movable member and ~the second latch for trip former whereby one spring is operated after ping the latter after a time interval permitting _the other so that the shutter members are- the shutter closing spring to function. 8. A timing device for shutters including shut positively opened and closed, a movable mount for the tripping lever, a knob pivotally attached ter mechanism for opening and closing a shutter 25 to the outside of the shutter casing and adapted aperture and comprising two springs, one for to position the tripping lever to engage a opening the shutter mechanism and the other selected tripping lug to determine the time of for closing the shutter `mechanism, latches for holding the springs against movement, and a exposure. _ 5. In a photographic shutter, the combination, -lost motion connection for controlling the rela 30 30 tive operation of the latches, means for trip with a casing` including exposure aperture there in, of shutter- members adapted to cover and ping one latch manually, said lost motion con uncover said exposure apertures, two springs nection comprising a shaft, a plurality of wash connected to the shutter members one for open- 1 ers ?evolvably mounted thereon having inter "ing the exposure aperture and the other for engaging lugs, at least one washer being inter connected with the shutter opening spring, each closing the aperture, a _control device includ ing two latch members adapted to hold the successive washer being adapted through the springs inactive, a tripping device for releasing interengaging lugs to Abe driven by the driven >one latch, a lost motion connection between the lug after the lost motion is taken up, a movable first and second latches, said lost motiondevice member adapted to be' positioned to engage a comprising a plurality of revolubly mounted selected washer lug, and to be operated thereby, connections between the movable number and washers each having interengaging lugs where by one may be turned by another when the the closing spring latch for operating the lat lugs are brought into contact, at least some of ter by the former, for closing the shutter mech anism, and a setting member for positioning the 45 45 the washers being provided with tripping lugs, movable member to vary the duration ot time a trip lever adapted to be operated by a trip ping lug, and connections between the tripping between the shutter opening and closing. 9. A timing >device for shutters including a `lever and second latch for operating the latter by the former whereby one spring is operated shutter mechanism for opening and closing a2 50 after the other so that the shutterfmembers are shutter aperture and comprising two springs, _one positively opened andi closed, a moveable mount for opening the shutter mechanism and the for the tripping lever, a knob pivotally attached other for closing the shutter mechanism, latches for holding the springs against movement, and to the outside of the shutter casing, a cam ca a lost motion connection, for controlling the ried by the knob inside of the casing and en rotative operation of the latches, means for 55 55 gaging the trip lever to position it to engage a _tripping one latch manually, said lost motion selected lug to determine the time of exposure. 6. In a photographic shutter, the combination, connection comprising a shaft, a plurality of with a shutter casing having exposure apertures, rotatably mountedv «lugs projecting radially from of shutter members for opening and closing the said shaft, each lug being spaced axially from 460 exposure apertures comprising separate curtains, leach of the other lugs, a member movable axially ofthe shaft and adapted to be positioned for a separate power spring for each shutter mem ber, means for simultaneously tensioning both engaging any one ofthe radially and axially springs, a latch for holding each spring under spaced lugs vand adapted to be actuated by a tension, means to manually trip one latch, means lug, connections between the movable member 65 to automatically trip the second latch `includ and thev closing spring latch for operating the 65 ing a lost motion device, whereby one latch ' latter by the former for closing the shutter may be tripped a predetermined time >after the `other latch -to produce an exposure, a plurality of rotatably mounted, washers each having a 70 radially projecting lug and each having inter engaging lugs whereby each rmay turn independ mechanism, and a _setting member for position ing the movable member to vary the duration ,of exposure. ` ' ` " ‘ . D’ARCY A. YOUNG, Jn.