US1393793A

US1393793A - Camera

Info

Publication number: US1393793A
Application number: US169423A
Authority: US
Inventors: Constant J Kryzanowsky
Original assignee: Crown Cork and Seal Co Inc
Current assignee: Crown Cork and Seal Co Inc
Priority date: 1917-05-18
Filing date: 1917-05-18
Publication date: 1921-10-18
Anticipated expiration: 1938-10-18

Description

'0. 1. KRYZANOWSKY.

CAMERA.

APPLICATION HALED MAY I8, 1917.

Patented Oct. 18, 1921.

4 SHEETS--SHEET1- C. J. KRYZANOWSKY.

CAMERA.

APPLlcATloN f1LEn,nAY18,1911.

Patented Oct. 18,. 1921.

4 SHEETS-SHEET 3.

0.1. KRYZANOWSKY.

CAMERA.

APPLICA-HON FILED MAY18|I9|7| 1,898,793. y Patented 001;. 18, 1921.

. SHEETS-SHEET 4.

UNITED STATES PATENT OFFICE.

CONSTANT I. KBYZANOWSKY, OF MOUNT WASHINGTON, HABYLAND, ABSIGNOB TO THE' ,CROWN CORK AND SEAL COMPANY OF BALTIMORE CITY, OF BALTIMORE, MARYLAND, A CORPORATION OF IABYLAND.

CAEEEA.

Specification of Letters Patent.

. Patented oct. 18,1921.

Application led Iay 18, 1917. Serial No. 189,423

To allwhomz'tma Be it known t at I, CONSTANT J. KRY- zANowsKY, a citizen of the United States, residing at Mount Washington, county of Baltimore, and State of Maryland, have invented certain new and useful Improvements in Cameras, fully described and represented in the following specification and the accompanying drawings, vforming a part of the same.

This invention relates to cameras and` particularly cameras of the so-called step and repeat variety. .p

In such cameras, an object, such as a unit design, is photographed on a sensitized plate in a plurality of positions according to a predetermined plan. result, a number of exposures are made, the relativeposition of the sensitized plate and the lens being changed for each eX- osure. Cameras of this sort, as heretofore lnown, have been subject to several objections and disadvantages. For example, they have been lacking in exactness and uniformity due .to inaccuracies irl-locating the parts and other 'reasons As an example of one use of such a camera in which exactness and'uniformity are articularly important, is 4the production o stamped or punched from a sheet of tin or the like. In such cases it is desirable to produce a sheet lithographed with a relativelylarge number of the'unit designs, the single articles being then punched out. To obtain such a sheet the design is lreproduced according to the desired planon a photographic plate and the sheety is produced by the usual lithographie process. Since the `punching is automatic,l each unit design should be ositioned exactly and successive sheets shou d be uniform. It follows, therefore, that the photographic plate should possess' an equal degree of exactness and uniformity. As further examples of objections to step and repeat cameras as heretoforey known, their operation has been slower than commercial eiiiciency demands; there has been an excessive loss of sensitized plate due to breakage and spoiling; it has been necessary to carry on the work ,ina darli room; and the whole operation has been lacking in efficiency and economy.

It is the object of the .present invention to provide a step and repeat camera capabie To obtain this lithographed articles Yof a high degree of exactness and uniformity; a camera available for day-light use; and a camera meeting the demands of commercial' efficiency.

The following specification describes and the accompanying drawings illustrate a step and repeat camera constructed in accordance withl the invention, it bein' undery stood that changes may be made in t e form,

construction and arrangement ofthe parts without departing from the invention, the form herein disclosed being a preferred embodiment thereof.

In the drawings- Figure 1 isa vertical cross-sectional view with ,parts in front elevation of a camera constructed in accordance with this invention;

' Fig. 2 isa cross-sectional view of tne'same with parts lin side elevation, showing the same somewhat' enlarged,

Fig. 3 is a top plan view;

Fig. 4 is a cross-sectional view on the line 4-4 of Fig. l; v i' Figs. 5 and 6 aresimilar views on the lines 5-5 and GAV-6* of Fi 1, respectively;

Fig. 7 is a detail view s owing `l the locating and locking device for the master plate; Fig. 8* is a detail view of the locating dowel, taken in vertical section, and

Fig. 9 is a diagrammatic view of the shutter mechanism.

As hereinafter more fully appears, the` device comprises an object which is the unit to be photographeisu light source, a lens, and a sensitized plate on which the unit object is to be reproduced in a redetermined arrangement, the object a the sensitized plate being in the conjugate foci of the lens.

Referring to the drawings, the device comprises a supporting frame including upright portions 15, cross-pieces 16 and atseparate top frame 17.

yIn order to absorb vibrations and for similar reasons, meansl is provided for yieldably carrying the object which is illustrated herein as a transparent plate bearing there'- on the unit design, and in structure embodying'thc invention to the best adrantagathis object plate is yieldably clamped. within two-part plate-holder. Although capable or various constructions, in the present embodiment the obiect plate i8 carried by fin,

the cover and holder together, a clamping member 22 including a thumb screw 23 is hinged to a second resilient or yielding support 24. When the object plate is in place, it is held between resilient gaskets 25 which engage it on either side and which are carried by the cover and holder, respectively.`

Just beyond the object plate, about the central opening, the holder is provided with a flange 26 on which rests a light screen 27 held in place by a spring clip 28 and having a central opening 29 in alinement with the/lens.

Means is provided whereby the holder 19 is removably mounted in the camera. In the present embodiment, a sleeve-like mounting 30, hereinafter referred to further, is provided with a pair of downwardly eX- tending flanges 31 .to which are secured supporting members 32 so as to form internal shoulders, as more clearly appears in Fig. 1. To receive or embrace these shoulders, the top of the holder 19 is rabbeted on each side, as shown, and extending over these rabbeted portions is secured a pair of slide members 33 which rest on and slide over the supporting members 32. This provides a sliding tongue and groove connection which permits 'the holder 19 to be readily slid into place or removed by means of its handles 34. ln order to properly position the holder in the mounting the mounting is provided with a pin 35 which serves as a stop for a shoulder 36 formed in the holder.

rlhe invention includes means tor adjusting the position of the object both longitudinally with respect to the lens and rotatably in its own plane so as to square up the unit design with the negative. Although capable of various constructions, in the 'form shown, the mounting 30 is telescopically embraced within a vertically disposed .cylindrical support 37 formed by 'a downwardly extending portion of the frame cross-piece 16. The mounting 30 is rotatable in the cylindrical support and is also longitudinally movable therein, and the parts are normally locked in position by means ot a bolt 38 operating in two sleeves 39 carried by the support 37 and cut away, as shown in Fig. 1, to accommodate the sleeve 30.v

The invention includes means whereby the photographic plate is movable in a longitudinal plane across the axis of the lens, so as to bring substantially any part thereof in alinement with the lens, and in struc- Asv tures embodying the invention to the best advantage, the plate isV carried in a holder, hereinafter described, in a carriage movable in at leasttwo directions across the lens axis. Although capable of various constructions, in the present embodiment, the carriage comprises two relatively moving parts, a carrier or base movable in one'direction and a carriage movable either with the base or relative thereto. Referring morel particularly to Figs. 1 and 2, the carriage comprises a base or carrier .40 having a substantially rectangular flat upper face containing a large central opening 41, and a downwardly extending flange 4,2. Each of the two opposite 4flanges of the carrier carries a pair of studs 43 on which are mounted wheels or rollers 44 arranged to run on parallel tracks 45 carried by internal flanges on the frame uprights 15. Each of the other two flanges 42 carries similar studs 46 and rollers 47 which cooperate with parallel tracks 48 depending from the bottom of the carriage 49. This latter member is in the form of an open sided frame, as more clearly appears in Fig. 4 to receive and embrace the plate holder.

For convenience in manipulating the carriage, the front corners thereof are extended, as at 50, and are provided with knobs or handles 51. k

Due to the construction described, the carriage 48, carrying the plate, is movable in two directions at right angles to each other. Looking at Fig. 2, for example, the carriage with the carrier, is movable forward and back, whereas the carriage alone is movable relative to 'the carrier, to the right or left.

ln order that the camera may be available for so-called daylight use, there is provision for carrying theplate in a iightproof holder and for a lightprooi casing between the plate and the lens. While these features are capable oi various constructions, in the particular form shown, the photographic or sensitized plate 53 is carried in a lightproof holder 54, having a hinged cover 55 provided with a latch 56. The plate rests on a curved cornered rectangular flange 57 and a bar spring 58 carried by the cover presses down against the back of the plate to hold it in place.

Within the supporting flange and ot nearly the same size, the bottom of the plate holder has an exposure opening 59 normally closed or covered by a lightproot removable screen 60 which slides in suitable grooves in the holder and which has a handle portion 61 and a latching clip 62.

VMeans is provided for properly position- `ing the plate in the holder, so that all plates of a series will have the same relative position. ln the particular construction illustrated, the edges of the corner-ot the plate are engaged by stops .63 and the edges of lli) the diagonally opposite corner are engaged between shoulders 64 on a pivoted centering device 65 held in place by a spring `66 and provided with a handle 67, this device 65 being self-centering. 1n this manner the plates may all have the same relative position in the holder, and in addition the holder itself is accurately positioned in the carriage. As shown, the carriage has one open end for the reception of the holder which slides into place between the side walls 68 of the carriage and is stopped by the rear wall or shoulder 69. As more clearly appears in Fig. 4, the holder lits snugly in place and is held in position by clips 70.

To provide a lightprootv casing between the plate holder and the lens, the carriage, about its central exposure opening, is provided with a cylindrical skirt or thimble 71 which extends down through the central openingof the carrier and beyond the same, as appears in Figs. 1 and 2. Telescoping over the end of this skirt or thimble 71 and secured tightly thereto, in a manner to exclude light, is a lightproof ieXible bellows 72 of cloth or other suitable material, the

lower end of which is similarly secured to a shouldered lens support 73 secured to the frame 16. Thus a lightproot` connection between plate and lens is provided, the bellows accommodating the various movements of the plate. To cut off any stray light, across the upper opening of the thnnble 7l is a screen 74 having a plurality of openings 75, one or another of which is brought into alinement with the lens as the carriage is moved, these openings corresponding in arrangement to the arrangement of the images toI be photographed on the negative.

Means is provided for mounting the lens whereby it may be positioned and maintained according to its proper focal length. Although capable of various constructions, in the present embodiment, the lens support 73 has a central, shouldered boss 76, and driven into this boss is a shouldered bushing 77. rlhe shoulder of this latter rests against the shoulder of the boss, as appears in Figs. 1 and 2. The lens is carried in a shouldered lens mounting 78 which is screwed or otherwise inserted in the bushing- 77 until their respectivev shoulders engage. rlhe substantial focal relation between plate and -lens 1s provided for in the general design of the camera, but in order to obtain very exact relative position, the shoulder o the bushing 77 is machined until, by experiments with a given camera, the exact focal position is determined.

rlhe embodiment of the invention illustrated comprises an artificial light source and the invention lincludes provisions olf plurality of light sources of dii'erent values, movable into and out of operative position. 1n structures embodw'rfv the invention to the best advantage a plurality of light sources is provided capable of movement into operative position at different distances from the object. Although capable of various constructions, in the particular construction shown, two light sources are provided. These are indicated as lanterns 8l, 82, no specific light structure or means lbeing illustrated, as the lights per se form no part of the present invention, and any suitable light, such as is well known in the art, may be used. Associated with each lantern is the usual ray directing and projecting means, indicated at 83 and including the rim 84. To permit ready movement ot' the lanterns into and out of operative position, they are secured to a support 85 slidable across the lens axis on a track 86 carried by the frame of the camera. The support 85 has a stepped up portion 87 which carries one lantern, the other being carried b v the support proper. In this manner the light sources are at different distances from the object. As shown in Fig. l, lantern 8l is in operative position with the rim close to the object. To obtain a light of less intensity, the support 85 is moved to the left (Fig. l) until the rim of lantern 82 is in line with the object. As will be apparent, this light will not be as close tothe objectas the other was.

Means is provided for readily locating either lantern in operative position. ln the present form, carried by a pin 88 screwed into a boss 89 in the main frame, is a V- shaped block 90 adapted to enter one ot' a plurality7 of similarly shaped notches 91 formed in a portion ot the support 85. these being one notch for each lantern. As the lantern support slides-,over its track, the block 90 drops intoone or the other of the notches and these notches are positioned so that as the block 90 enters one, the corresponding lantern is in operative position.

Means is provided for locking the lanterns in operative position. Although capable of various constructions, in the present form, the block 90 is locked in its notch. Pivoted to the pin 88 is a locking cam 92 bearing against the shouldered top of the block. 90, the cam being turned by a handle 93. Yhen the block has dropped into a notch, the cam is turned to clamp the block firmly into the notch and the lanternA is locked against movement. pposite movement of the cam releases 1the block and pressure on the support permits the same to move past the block until again locked. The clamping force of the cam 90- may be adjusted by screwing the pin 88 in or out of its'boss 89.

A shutter is provided for normally shutting ofl" the light rays from the lens, and in structures embodying ythe invention to the bestadvantage, the shutter will bel capable ot exposure adjustment. Although capable of various constructions', the shutter illustrated is a plate arranged to slide across the lens, between lens and light, and having an opening in alinement with the lens to permit. passage of the light rays and consequent exposure as the shutter is operated. As shown, the shutter includes an arcuate plate 95 having associated therewith upturned edges 96 which enter suitable spaces formed in the lens mounting, asappears in Fig. 2, the shutter being held close to the lens mounting member 73. Located in the arcuate plate 95 is a rectangular opening 97 arranged to cross the lens axis as the shutter moves one way or the other across thev lens. Asthe character of exposure varies with the shutter opening 97, exposure may be adjusted by substitutingl shutter plates having different sized openings.

Means is provided for operating the shutter, and in structures embodying the `in'ven tion to the best advantage the shutter is gravity operated. Although capable ot various constructions, in the vform shown the shutter is carried by two arms 98 merging into a single arm 99 secured to a boss 100 formed on a compound pendulum 101 having upper and lower weights 102` 103. To pivot the pendulum. the boss vis journaled on a sleeve 104 mounted on a pin 105 carried by the main trarne. It will be seen that as the pendulum swings one way or the other, the shutter will be operated to carry the opening across the lens, or, in other words,

each swing of the pendulum opens the shutter and permits an exposure. It is noted that the shutter o ening and shutter are so arranged that t e opening crosses the lens as the pendulum attains approximately its maximum velocity. As gravity and the friction ot the parts may be considered' constant. thelsucccssive exposure for a given adjustment of the various elements involved are substantially uniform.

The invention includes means for locking the pendulum against movement and for releasing the locking means to permit the pendulum to swing to open the shutter and in structures embodying the invention to the best advantage,'the locking means will be automatically operated at each stroke ot the pendulum, thereby to loclr. the shutter after each exposure. Although capable of various constructions, in the formshown, journaled on a bushing on the stud 105 is an operating member comprising a long rod 107 having a handle 108. At its lower end .the rod 107 has an enlarged portion or toot 109 which Carries a pivot pin 110 on which are mounted two arms 111 having weighted portions 112. These arms are oppositely disposed and the inner one is bent outwardly so their ends lie in the same plane, as a pears in Fig. 2. Each arm basan upward y extending lug 113 and thefweighted portion is so arranged as to tend to swin the lug in against a stop pin 114 carried by the foot of the rod 107. y

When the pendulum is raised, as shown, for example, in/F ig. 9, its tendencyis to swing downwardly. To prevent this movement and the resulting operation of the shutter, the lower weight 103 of the pendulum carries a stop member 115 `adapted to be engaged by the curved ends of the arms 111. The weight of the pendulum presses against the arm 111 and through the engagement of the lug 118 with the pin 114 holds the foot of the rod 107 against a stop pin.116. The parts are therefore locked against movement. To release the lock to permit the shutter to operate, the operating bars 107 is swung on its pivot, as, for exam le, in the direction of the arrowgin Fig. 9, tlius throwing the foot to the left.` Durin the first part of this movement, the left iiand arm 111 isl pushed `against the lower Weight of the pendulum, and rod and pendulum move together to the left. As soon, however, as the weighted ortion 112 of the arm 111 strikes the right hand stop pin 116, the arm is tripped to swing its end out of contact ywith the lug 115, thus releasing the pendulum and allowing it to swing on its pivot in the ordinarymanner of a compound pendulum. Meanwhile the foot 109 of the operating rod has moved over to a position against the left hand stop pin 116. The arms 1.11 and the pendulum are so arranged, that the pendulum swings somewhat beyond the end of the arm. rrhus, in thev operation being described, the pendulum swings to the right until somewhat beyond the end of the right hand arm 111, which, meanwhile, under the influence of its weighted end 112, has been swung up until its lug 113 strikes the stop pin 114. This ositions the arm for its end to engage the ljug 115 as the pendulum starts its return stroke. This engagement locks the parts again in a position just the opposite of that shown in F ig. 9 and they remain locked until the rod 107 is again shifted.

eans is provided for adjusting the speed oi' the shutter movement, and in structures embodying the invention to the best advantage, this is accomplished by inherently regulating the stroke ot the pendulum. Although capable of a wide range of oonstruction, in that illustrated the upper weight 102 is slidable on the pendulum shank, being secured in place by a set screw 117. By moving this weight up or down on the shank, or by substituting different weights, the stroke oit the pendulum is regulated as desired. Vf ith the pendulum reali'.-

ing its stroke at dierent speeds, the speed' mum velocity of the pendulum, successivev exposures are substantially'uniform. After one exposure the shutter is automatically locked, this lookin means being also gravity-controlled. s a result, an'effective shutteris obtained, which is rugged, com" pact and capable of a variation of exposure. As before described, the, photographic plate is movable across the axis of the lens to place the various image-receiving portions in alinement with the .lensQ-Mens 'is provided for locking the plate inla'ny'f'one of a plurality of'predetermined positions', and in structures embodying the invention'to the best advantage there is p rovidedaimaster plate and cooperating locating means,` one of these elements being stationary, the other.

moving with the plate and its` carriage. Although the locking-means may vary within a wide range, they may comprise coperating pins andsockets, part being carried by the master plate and part stationary. Although capable of various constructions, in the present embodiment the carriage for the plate-holderv has upwardly extendingJ sides 68 on whichis mounted a master plate 121 to move as a unitwith the carriage. This master plate carries a plurality of setin flanged bushings 122 forming frusto-conical sockets 123 for receiving a similarly shaped dowel pin 124 mounted .in a housing 125 carried by the top portion of the frame work. The sockets 123 are arranged in accordance with the predetermined arrangement which the unit design is to have on the photographic plate. When the dowel is insorted in one of the sockets, in which it snugly fits, the carriage and consequently the plate is positively located in an exact and definite position with a given portion in alinement with the lens. When the dowel is removed, the carriage moved to bring upanother socket, and the dowell again inserted, another predetermined portion of the plate is definitely and exactly fixed in alinementI with the lens. Thus, by repeated locations of the carriage to bring .each socketfin coperation with the dowel, all the predetermined image-receiving portionsof the plate are brought into proper position, Yand-.the

unit design' is reproduced exactly in ac-l cordance with ythe predetermined arrangement governed by the master plate and all succeeding plates are uniform.

Means is provided for `locking the plateI and its carrier in the located positions, and

in structures embodying 'the invention to the best, advantage, `this is accomplished by locking the dowel in the sockets. Although capable of various constructions, in that shown, in the housing l.125- is a coil spring 126 bearing against a shoulder formed on the dowel and arranged to press the dowel into a socket. To withdraw the pin and hold it withdrawn, it is carried by a cross in 127 mounted in a slotted cam 128 bear- 111g against they top of the housing 125 and having an operating handle 129. As appears m Fig'. 1,. this cam has a flat surface which engages the housing when the dowel is in arsocket. By throwing the handle 129 over about 180, the increasing curve of the vcam rides over the housing and raises the Idowel and'holds it raised until the handle is reversed.

. lt may be desirable to use the camera toreproduce diEerent arrangementsof the unit design without changing the master plate. To this end, the master plate may have more than one Set of sockets. ln thepresent embodiment, there is shown, as an example, in Iadditionto the sockets 123, a second set of sockets 130 similar to those described, but

located in accordance with a different arrangement. To coperate with these sockets is a second dowel 131. similar to that described and having'the same locking Aand withdrawing means. With such a construction plates maybe exposed according to one arrangement, andpthen, by locating the carriage by means of the dowel 131 -and the sockets 130,- other plates may be exposedv havingv a different arrangement of the unit design, without any 'change in the apparatus. In either case the plate is always positively and definitely located and locked in `place,so that a high degree of exactness and uniformity is obtained.

The invention includes means for' indieating the movement and locations of the plate andl in structures embodying the invention tothe best advantage, an indicating plate is provided bearing indiciaarranged according tothe larrangement of the sockets of the master plate. A pointer is also provided and one of these elements is stationary, the other moving` with thev carriage. Although capable .of various constructions, in the form shown, mounted on the top frame 17 is an indicatingl plate 132 bearing markin 133 arranged to correspond with the posltionsof thel sockets A123. A pointer 134: is mounted on the carriage and as theI latter moves, the ointer indicates this movement and shows'ln which particular position Atheplate is located. Thus, in Fig. 3, the pointer restsover the upper lefthand mark showing that the dowel is in the upper left hand socket. For the second set lor' `locating socketsa second indicating plate 135 and pointer 136 are provided.

The operation of the camera will be clear from the above description, but to recapitulate briefly, theobject plate bearingthe unit design is placed lin its holder, and the desired li ht source laced 1n operative position. late'lho der in which a photographic` pihte has been placed in a darkv room, is inserted in the carriage. 4lThe light screen of `the-holder is withdrawn and the 'carriage located in the first position by .bringing a socket in position to receive the dowel. The operating bar 107 is thrown over which causes the shutter to move past the lens, thus making an eizposure. dowel is withdrawn, the carriage in oved to bring up another socket, vthe dowel inserted and another exposure made. This continues until all sockets have cooperated with the dowel in locating the plate, -the light screen is replaced andthe plate-holder 1S removed. For succeeding operations, the sainel plate holder may-be reloaded, orto save time, a number of duplicate holders may be used.

What is claimed is:

1. In a step and repeat camera, an upright frame, a lens carried by said frame with its axis in a vertical plane, a carriage mounted in said frame to move in a horizontal plane, a photographic plate holder carried'by said carriage, a master plate moving withsaid plate holder, and means for locating said master plate in a plurality of predetermined positions. l

2. In a step and repeat camera, an upright frame, a lens carried by saidl frame with its yaxis iii a vertical plane, a carriage mounted in said frame to move iii a horizontal plane, a photographic late holder carried by said, carriage, a exible light proof casing betweensaid plate holder and/ the lens, a master plate moving with said 4*plate holder, and means for locating said master plate in" a plurality of predetermined positions. v

3. In a step and repeat camera, an upright frame, -aleiis carried by said. frame withits axis in a vertical plane, a carriage mounted in lsaid f-rame to move in a horizontal plane and having a centra-l opening therethrough, a photographic plate holder carried -b said carriage, a skirt on said plate hol er extendin A riage opening, a flexib e light proof casing connected to said skirt and' to said frame adjacent the lens, a master plate moving with said plate holder, and means for/,locating said master plate in a plurality of predetermined positions.

4.In' a step and-repeat camera,

through said car- 'a lens, a

plate holder movable across the axis of thelens in "more than one direction in order that a vphotographic late'carried thereby may be given a pl'iira ity of .predetermined positions with re` ect to e lens, a relatively stationary ocating element, and a The removable light' master plate' movin with said plate holder and having a plura ity of locating elements for coperating with said stationary locating element to locate the photographic plate in all of said predetermined positions.

5. In a step and repeat camera, a lens, a photographic plate holderv movable across theaxis of the lens in more than one direction in order that a photographic platecarried thereby may be given a plurality of predetermined ositions with respect to the lens, a relative y stationary dowel, and a master plate moving With said plate holder and provided with a plurality of dowel receiving sockets for coperating with said dowel to locate the photographic plate in all of said predetermined positions.`

6. In a step and repeat camera, a lens, a photographic plate holder, means for moving said plate holder across the lens in more than one direction in order that a photographic plate, carried thereb maybe given a plurality of predetermine positions with respect tothe lens a relativel stationary dowel, and a master plate mova le with said plateliolder and providedv with a plurality of dowel receiving sockets for coperating with said dowel to locate the photographic plate in all of said predetermined positions.

7. In a step and repeat camera, a lens, a photographic plate holder, ay carriage for said plate holder movable'across the axis ofthe lens in more than one direction in orde-r that a photographic plate carried therebymay be given a plurality of predetermined 1positions with respect to the lens, a relative y stationary dowel, and a master plate connected with said carriage and havl ing a plurality of dowel receiving sockets and a .master plate locating elements, whereby the plate having a a late ho der, means ho der is insertibley in said carriage in a given position, means for fixing the position of the hoto a hic late in the plate holder, and aprelatigvrelly startionary locating element for coperatng with said locating elements to locate the photographic plate withall .of said predetermined positions in alinement with the lens.

9. In a step and repeat camera, a lens, a

roof plate-holder, a carriagefor said ho der movable across the axis of the .lens in more than one direction, a` master plate movable with said, carriage, los' eating means .associated withfsaid master plate. and stationary locating means for cov by one ol said ,carriage parts, a master plate movable with said plate holder, meansv for locating said masterplate in a plurality of predetermined positions, and a flexible light screen between said plate holder -and the ens.

11. In'a step and repeat camera, a lens, a photographic' plate holder movable across lthe airis of the-lens, a master plate movable with lthe photographic plate holder, means for locating the master plate in a' plurality of predetermined positions, and indicating means -for tracing the path of movement of said 'plate holder.

12. In a step and repeat camera, a lens, a

i. photographic plate holder movable across'.

fas

the axis of thelens, in ordervth'at a photographic plate carried thereby. may be given a p urality of predetermined positions with respect to the. lens, a master platemoving with lsaid plate holder and having amphirality of locating means arranged vin accordancewith said positions', a relatively stationary locating member coperating with saidlocating means, and indicating ,means including indicia arranged to correspond with the arrangement of said predetermined positions. v

13. In a step and repeat camera, a lens, a photo raphic plate holder movable across the axis of the lens, in order that a photogra hic plate carried thereby may be given a p urality of predetermined positions with respect to the lens, means for locating said photographic plate holder to place said positions in alinement with the lens, and indicating means including indiciaA arranged to correspond to `the arrangement ofsaid predetermined positions.

14. In' a step and repeat camera,a lens, a photographic plate, movable4 across the Vairis of thelens in more than one direction, on

"which an object-isfto be reproduced in accordance with "oneor another ofv different arrangements ofpa plurality of predetermined.

positions, a masterfplate moving with the photographic. plate and having a plurality of locating, elements arranged in accordancev with each of saiddierent arranges ments, -and a relatively stationary locating element for coperating with all of said lo-v eating. elements I to locate the photographic plate in any or all of said predetermined` positions.

15. In a step and repeat camera, a lens, a photographic plate, movable across the axis of the lens, on which an object is to be reproduced in accordance with one or another of different arrangements of a plurality of predetermined positions, a master plate moving with the photographic plate and having a plurality of dowel receiving sockets arranged'in accordance with each of said different arrangements of predetermined posi'- tions, and a relatively stationary dowel cooperating With all of said locating means to locate the photographic plate in any or all of saidy predetermined positions.

16. In a step and repeat camera, a lens, a removable light prooi` plate holder, a earriagefor said plate holder movable across the axis of the lens in more than one direction, a flexible light proof casing between said carriage and the lens, a master plate movable with said carriage, locating means associated with said master plate, and stationary locating means for coperating with said first named means to locate said master plate in a plurality of predetermined positions.

17. In a step and repeat camera, a lens, a photographic plate holder movable across theaxisof the lens, a master plate moving with said plate holder, means for locating said master plate in a plurality of predetermined positions, a shutter for the lens, land gravityoperated means for operating said shutter.

18. Ink a step and repeat camera, a lens, a photographic plate holder, va carriage for the plate holder movable across the axis of the lens, a master plate rigidly connected with said -carriage-andhaving a plurality of dowel receiving sockets, a relatively stationary dowel coperating with said sockets.

Abeing stationary and the other movable with said master plate.

- 20. In a step and repeat camera, a frame, a plate holder, a two part carriage therefor, a track and roller connection between the two parts of the carriage, a track and roller connection between one part of the carriage and the frame, amaster plate yrigidly connected with the carriage, anda stationary locating member cooperating with the maeter plate.

21. ln a step and repeat camera, a lightproof plate holder, a carriage for' said plateltiolder movable across tlie axis of the lens, means for locating the carriage in a plurality of predetermined positions, a light screen carried by the carriage and having a plurality of openings brought into alinement with the lens upon movement of the carriage, and exible light screen between the carriage and the lens.

22.y ln a step and repeat Camera, a lens a photographic plate bolder movable across the axis of the lens, a master plate moving *with said plate holder, means for locating said master plate in a plurality of predetermined positions, a. shutter for the lens, and a pendulum for operating said shutter by gravity.

23, ln a. step and repeat camera, a lens, a

photographic plate holder movable across 'the axis oi2 the lens, a master plate moving with said plate holder, means for locating said master plate in a plurality of predetermined positions, a shutter provided with an opening adapted to move past the lens, and gravity operated means for operating said Shutter 'to move the opening past the lens.

24:. Ina step and repeat camera, a lens, a photographic plate holder movable across the axis of the lens, a master plate moving with said plate holder, means for locating said master plate in a plurality of predetermined positions, a shutter provided with an opening adapted to move past the lens, and a pendulum for operating the shutter to move the opening past the lens.

in testimony Whereol. I have hereunto set ny band.

CNSTANT J. KRYZANOWSI Y.