US849184A

US849184A - Photographic-printing apparatus.

Info

Publication number: US849184A
Application number: US16451003A
Authority: US
Inventors: Fredrick H Auld
Original assignee: FRED H COZZENS
Current assignee: FRED H COZZENS
Priority date: 1903-07-07
Filing date: 1903-07-07
Publication date: 1907-04-02
Anticipated expiration: 1924-04-02

Description

No- 849,184. PATENTED APR. 2, 1907.

- F.-H. AULD. I PHOTOGRAPHIG PRINTING APPARATUS.

APPLICATION FILED JULY 7, 1903.

6 SHEETS-SHEET 1.

' INVENR BY V 0. I ATTORNEY PATENTED APR. 2, 1907. P. H. AULD. PHOTOGRAPHIG PRINTING APPARAT APPLICATION FILED JULY 7, 1903.

6 SHEETS-SHBET 2.

WITNESSES:

PATENTED APR. 2, 1907.

P. H. AULD. PHOTOGRAPHIO PRINTING APPAR ATUS.

APPLICATION FILED JULY 7, 1903.

5 SHEETS'SHEET 3.

WITNESSES: flaw/ 0a 9% PATENTED APR. 2, 1907.

F. H. AULD. PHOTOGRAPHIO PRINTING APPARAT APPLICATION FILED JULY 7, 1903.

5 SHEETS-SHEET 4.

WITNESSES PATENTED .APR. 2, 1907.

F. H. AULD. PHOTOGRAPHIC PRINTING APPARA TU APPLICATION FILED JULY 7, 1903.

max

5 sHIlETB-SBEBT 5.

INVENTOR MM ATTORNEY PM IE UNITED STATES PATENT OFFICE.

FREDRIOK H. AULD, OF COLUMBUS, OHIO, ASSIGNOR TO FRED H. COZZENS, OF NEW YORK, N. Y.

PHOTOGRAPHlG-PRINTING APPARATUS.

Specification of Letters Patent.

Patented April 2, 1907.

Application filed July 7, 1903. Serial lilou 164,510.

To all whom, it may concern:

lumbus, in the county of Franklin and State of Ohio, have invented a certain new and useful Improvement in Photographic-Printing Apparatus, of which the following 1s a description.

This invention relates to that class of photographic-printing machines wherein a traveling sensitized strip is employed to which intermittent movement is imparted, so as to bring successive portions thereof into operative relation to a negative placed between such strip and the light.

The object of the invention is to produce a simple, durable, compact, and reliable mechanism whereby a large number of prints may be produced at high speed.

A further object is to provide efficient and reliable means for moving the traveling sensitized strip step by step for the successive exposures to the light and for holding the exposed portions thereof during the intervals of exposure motionless.

A further object is to provide simple but effective mechanism for exposing such strip a to the action of the light to permit the printing operation to take place.

A further object is to provide automatically-operating mechanism for positively determining or limiting the intervals of exposure of the sensitized strip.

A further object is to provide registering mechanism whereby the number of sections of sensitized paper successively exposed may be registered and indicated.

A further object is to provide a machine of the character indicated which shall be automatic with respect to the several features above stated, a single source of power being employed to drive all the movable parts.

A preferred form of the invention is illustrated in the accompanying draw ngs, in

- which Figure 1 is a side elevation, the ends of the frame carrying the sensitized-strip rolls being broken away. Fig. 2 is a central vertical section on a smaller scale and illustrating the rolls last referred to in operative position. Fig.3 is a plan view on the same scale as Fig. 1, the ends of the frame being, as in Fig. 1, broken away and the hood containing the light and shutter mechanism being removed.

Fig. 4 is a side elevation showing a portion of the machine on the side opposite that shown in Fig, 1, particularlv the mechanism for operating the shutters and the provision for moving the hood in which such shutters are contained upon its hinges. Figs. 5 and 6am detail views illustrating portions of the recording mechanism,hereinafter to be referred to. Fig. 7 is an end ele ation, partly in section, of the worm mechanism shown in elevation in Fig. 1 and in top plan in Fig. 3 for driving the dial of the exposure-determining device. Fig. 8 is a central horizontal section of the exposure-determining device and connected mechanism on the line 8 S, Fig. 1. Fig. 9 is an end elevation on the line- 9 9, Fig. 1, one of the rolls driving the sensitized strip not being shown; and Fig. 10 is a detail, hereinafter to. be referred to, illustrating in side view a portion of the stop mechanism shown in Fig. 9.

Referring to these drawings, in which similar letters denote corresponding parts, A A designate the front and rear members, respectively, of the frame of the machine, in the ends whereof are mounted the sensitizedstrip roll B and take-up roll B.

O designates the sensitized strip or film carried upon said roll B and running thence the entire length of the frame to the take-up roll B.

D D designate guide-rolls (the former be ing preferably adjustable relatively to the latter) the ends whereof are suitably journaled 'in the front and rear members A A of the frame and between which passes the sensitized strip C. After passing these guiderolls said strip passes through the feed-rolls E F, the ends whereof are also journaled in the front and rear members A A of the frame, and thence to the take-up roll B.

In order to keep the sensitized strip taut during its travel from one to the other of the rolls B B, I employ tension devices G, which are here shown as comprising arms g, pivotally mounted at their upper ends in the front and back members of the frame, and rolls 9, joining these arms and under which the sensitized strip passes in its travel from one roll to the other. The tendency of these tension de-- vices is naturally to assume a vertical posi tion, thereby imposing su'llicient weight upon [the strip to keep the same taut.

The eed-roll E. as clearly shown in Fig. 1. I

is mounted in a bracket e, through which proj ects a shaft or pintle e, the upper end whereof is threaded and here provided with a nute A coil-spring 6 lies below that portion of the bracket through which projects the shaft or pintle a, while a coil-spring 6 lies above such bracket and between the same and said nut 0 The object of this construction is to permit vertical adjustment of said feeded at Z to the rear memberA roll E to vary its relation to its companion feed-roll F. The trunnions f of the feed-roll F are journaled in the front and rear members A A. of the frame, one of said trunnions extending through the former member of said frame and being provided outside the same with the gear f meshing with the gear M carried by the front member A of the frame and to which movement is communieated in the manner hereinafter to be described.

H designates the exposure-hood. This is here shown as rectangular in shape, and mounted in the upper portion thereof is the electric lamp or other light-giving device H, suitably connected upon the outside of said hood with source of energy, if current be used as the lighting medium. l/Vithin this hood are the shutters I I, pivotally mounted upon shafts i, the ends whereof are journaled in said hood, one end of each projecting through the same to receive the motion whereby said shutters are operated. Said hood H is secured to the frame of the machine by means of hinges 72/. J designates the negativeframe, in which is mounted in any suitable manner the negative 7'. The side edges of this frame are provided with rabbcts receiving guides j, carried by strips 7' secured to the under side of the hood H. By means of this construction, as clearly shown in Fig. 1, the negative-frame J may be readily withdrawn from operative position for the removal of one negative and the substitution of another.

The mechanism for operating the shutters I is best shown in Fig. 4. The rotary shafts i, to which the shutters are secured, are provided outside the hood H with gears i, one meshing with a rack i on a block 71 and the other with a gear U, which latter meshes with a similar rack 91 formed upon a block. These blocks are secured to a reciprocating rod i passing through bearings i, secured to the exterior of said hood H. By reason of themterposition' of gear 07 reciprocating shaft i operates the shafts 'i, upon which the sh utters are mounted, in opposite directions.

K designates a reciprocating shaft for operating the blocks 1', the racks carried thereby, and the gears 71 and i of the shutters T. This shaft K passes through an orifice in one of the blocks i and is provided on either side of said block with collars. 7c. Said shaft is also provided at its free end with another collar or stop 76. An operatingdever L is pivotof the. frame,

and its end encircles the shaft K. On either side of the lever L where it encircles said shaft the shaft is provided with coil-s rings le lor the purpose of operating the rac s i i and coaeting mechanism without It will be noted that the shaft K is in the same plane as that in which the hood H is hinged on the top of the frame. Said shaft K being movable within the block 2, it therefore follows that said hood H may be thrown back upon its hinges without interfering with the coaction of said shaft K, the blocks t, the rod 71", the racks i i and gears i and i In other words, after said hood has been thrown backas, for instance,- when it is desired to inspect the interior of the machineif the machine be in operation the mechanism contained in said hoodto wit, the shutters, their shafts, &c.will operate in the same manner as when'sai d hood is in working position.

M designates an intermittent shaft, to which movement is imparted in the manner hereinafter described. Said shaft is mounted in the front and rear members A A of the frame both ends projecting through the frame and the rear end being provided with mechanism for operating the shutters through the medium of the lever L. This mechanism comprises a pulley m, with which coacts a belt or cord m, which cord also coacts with a pulley I), carried by the end of the shaft of the take-up roll B. Also mounted upon said shaft M is a cam m provided on lLS in ner face with a siud m. The periphery of said cam is provided with a notch or depression m with which eoaets a roller m, carried at the end of the fork Z of the lever L. Said lever L is also provided with a fork Z with which coacts the stud m of said cam m Normally the roller coaets with the continuously-curved periphery of the cam m Normally also the stud m and fork Z are not in operative relation. When during the rotation of said cam m the stud m coacts with the fork Z the lever L is rocked upon its pivot Z, thereby'moving the free end of said lever L toward the right, F ig. 4, and in turn moving the racks We and causing the operation of the gears i t of the shutters I I. The parts just described are so proportioned and arranged as that the roller m will enter the notch or depression m of the cam at the moment that the free end of the oscillat ing lever L reaches the extreme limit of its movement in one direction. At this moment the intermittent shaft M comes to a stop, thereby holding the shutters in open position. When movement of the ini ermittent shaft M is resumed, the roller m rides up on the periphery of the cam m and the stud m passes out of engagement with the fork Z thereby rocking the free end of the lever L in reverse direcfion and causing the shutters to be closed thereby.

. The intermittent shaft M is provided with a gear M, to which movement is communicated in the manner hereinafter described. The forward end of said intermittent shaft M is provided with two mutilated gears M M, the former being provided with teeth over preferably about a third of its periphery and the latter being toothed over a greater portion of its periphery.

The gear M is provided with an elongated slot M, through which projects a bolt on the gear M", having a nut thereon by means whereof said gears may be locked rigidly together.

M designates a gear mounted upon a shaft secured to the member A of the frame and of about the same breadth as the combined gears M M, said gear M being in operative relation to said gears M M. Said gear M coacts With the gear f, whereby movement is communicated to the feed-rolls F E, as hereinbefore described. The object in using the two gears M M on the intermittent shaft M is to vary the extent of movement which shall be imparted to the sensitized strip by means of the feed-rolls E F. The minimum movement is determined by the larger toothed portion of the periphery of the gear M From the movement imparted by this toothed portion the movement imparted to the rolls E F may be very considerably increased by adding to the effective toothed surface which coacts with the gear M the toothed surface of the adjacent gear M the gear M being, as above stated, broad enough to cover and coact with both said gears M and M For instance, in .Fig. 9 the movement of the intermittent shaft M will as soon as the first tooth upon the gear M comes into contact with the gear M start the latter in its rotary movement. Should it be desired to increase such rotary movement of the gear M and thereby draw the sensitized strip a longer distance, it is only necessary to move the gears M M relatively to each other (after loosening the nut on bolt M") and to extend the toothedporiion of the gear M beyond the toothed portion of the gear M, the teeth of both wheels being, however, in alinement when the gears are clamped together. In other words, a variable throw is secured by this means.

N designates a lock for the gear M This lock is provided with a tooth n, coacting with said gear, and is pivoted at n, a leaf-spring n being employed having a tendency to throw the tooth n out of engagement with said ear M Beyond the pivotal point n said 100 N is provided with an arm 7?, coacting with a cam n carried by a collar n, mounted upon the intermittent shaft M. The cam Wis so arranged on the shaft M as that after the section illustrated in Fig. 8.

gresses the diameter of the take-up roll B will be constantly increasing. The tension with which the belt m grips said pulleys m and b is such that as the diameter of said take-up roll increases there will be sufficient slip to prevent a pull upon the take-uproll, which added to the effect of the feed-rolls E F will draw forward a greater portion of the sensitized strip than is required.

In the present embodiment of the invention I have shown a gear 0, to which movement is imparted from a suitable source of power and which is the common operating medium of all the moving parts of the apparatus. Movement imparted to this gear 0 and its shaft operates through the smaller gear 0 the gear p, mounted on the rear end of the shaft P and outside the member A of the frame. The shaft P and the mechanism carried thereby and coacting therewith can perhaps best be understood from the horizontal Said shaft P extends through the entire width of the machine, projecting through the front member A of the frame thereof. It is provided intermediate of the members A A of the frame with a friction-clutch, here shown as comprising the female member P, secured to said shaft, and male member P mounted upon a sleeve P Between the male member P and female member P of the clutch is a coil-spring P exerting outward pressure to force the members of said clutch out of operative relation. Mounted upon the sleeve P is a gear P, which coacts with the gear M of the intermittent shaft M. Consequently the intermittent movement of said shaft is imparted from the rotary movement of the sleeve P and the gear carried thereby.

' Mounted loosely upon the shaft P is a collar Q, both said collar and said shaft extending through an orifice in the front member A of the frame. Inside the frame said collar Q is provided with a cam q, theinner surface whereof is provided with a'lug g, which in operation coacts with another lug 9 carried by'said member A of the frame. Outside said front member A of the frame the collar Q, is provided with a dial-wheel Q, movable thereon and having a toothed periphery, as shown in Fig. 1, and the face of which is provided with a scale indicating,preferably, seconds or parts thereof. An index is also mounted on the collar Q so as to turn there with and 006 erates with the scale on the face of the dia The outer end of the collar Q is screw-threaded to receive 'a nut P between which and the dial Q the index Q is confined. By tightening said nut said dial and index may be firmly bound together.

Q designates a coil-spring one end whereof is secured to the collar Q, upon which the dial Q operates, the other end of said spring being secured to a stop Q carried by the front member A of the frame.

R designates a cam keyed to or formed inte ral with the sleeve P, the object whereof will be presently described. Between the cams R and q is a thrust-sleeve R.

S designates a gear keyed or otherwise secured to the shaft P and meshing with a gear 8, carried by the rear member A of the frame, and this gear 8 in turn meshes with a gear 8, carried by a shaft 8 the ends of said shaft being jeurnaled in the front and rear members A A of the frame. Near its front end the shaft 8 is provided with a bevel-gear s coacting with a corresponding gear 8 at oneend of a shaft S. Also carried by said shaft S is a gear 8, the purpose of which will be presently described. The shaft S is car ried in the bifurcated end of a bracket S as clearly shown in Fig. 9. The gear 8 carried by the shaft S, is in constant operation, the

' gear S, by means whereof movement is com riphery of the dial Q,

municated to the shaft 8 and therefore indirectly to said gear 8", being mounted upon the shaft P, which is in constant operation under the influence of the gear 10.

T designates a shaft provided with a worm T, said shaft being journaled in the bifurcated ends it of the pivoted worm-carrier T whichin turn is pivoted at t upon the shaft S, on which the gear 3 is mounted. This device is best shown in Fig. 7. The wormearrier T is provided with a depending arm T, which coacts with the outer face of the cam R. Said outer face of the cam R is provided' with a recess 1". The worm T is normally in operative relation to the toothed pcbut may be thrown out of such operative relation by the movement of its carrier T upon the shaft S, upon which it is pivoted. The worm-carrier is provided with a leaf-spring t the opposite end whereof cooperates with the support S for the shaft S, the tendency of said spring being to depress the outer end of the worm-carrier T in which the worm T is mounted. Upon such depression said worm is brought into olperative relation to the dial Q. It follows t iat when the depending arm T of the wormcarrier is in engagement with the face of the cam R the worm T is out of engagement with the periphery of the dial Q. When during the rotation of the cam R the end of the de pending arm T comes into engagement with the recess formed in the outer face of said cam R, the worm-carrier is tilted upon its pivotal point, (the shaft S,) whereupon the outer end thereof, carrying said worm T, is depressed and brought into cooperative relation with the toothed periphery of the dial Q.

U designates a stop, here shown as con sisting of a screw to, having an adj usting-head u, said screw engaging with a lip a on the front member A of the frame. Coaeting with this stop is a lug 20', carried by or formed integral with the dial Q. When the lug a is in engagement with said step, the dial will be at zero, the position in which it is illustrated in Fig. 1. If new the nut P be loosened and the index Q turned relatively to the Zeromark on said dial, the lug will be moved away from the lug a distance corresponding to the interval between the end of said index Q and the zero-mark upon said dial. In other words, the relation between said lugs and the relation between the index and the zero-mark on the dial represent the duration of the exposure to which the sensitized strip is subjected. After this adjustment of the index Q and dial Q has been effected and movement imparted to the gear 30 the gears S, s, and s, the shaft 8 the bevel-gears s and s, and the gear 8'' are set in continuous operation. At this time the lower end of the depending arm T 3 of the worm-carrier is within the recess 1' of the cam R and said worm therefore in operative relation to the milled or toothed exterior of the dial Q. Consequently the continuous movement of the gear 8 is transmitted to the shaft T and worm T and thence to said dial Q, operating to move said dial the distance between zero and the point to which the index Q has been moved. have been moved to a point where the indicating-mark upon which said. index has been brought to rest is in the position in which the \Vhen said index and dial Q zero-mark is shown in Fig. 1, the lugs q and (f are brought into eoaetion, thereby moving rearwvnrdly the cam q and the sleeve P upon the end of which is mounted the male member P of the clutch. As the two members of this clutch. come together the continuous movement of the shaft 1 is imparted through said clutch to the sleeve P and therefore to the gear I carried by said sleeve and which, as hereinbefore described, drives the filmoperating mechanism. The cam R of course rotates with the sleeve P. As' the recess 1" therein passes out of engagement with the lower end of the depending arm T the worm-carrier is tilted upon its pivotal point, (the shaft S,) thereby'throwing the worm T and the dial Q out of operative relation, whereupon the spring Q will return said dial and index to starting position. In other words, the shaft and the'gears carried by and coacting therewith form, in effect, abypass for the application of power, which, however, is no longer needed when the sleeve P has been pressed rearwardly and the clutch mechanism heretofore described brought into action.

V designates a cam also mounted upon the 5 sleeve P and, like the cam R, provided with a recess '0. With this recess engages a roller 1;, formed on the end of an arm V, carried by a cross-bar A extending between the members A A of the frame. Normally and when the clutch is in inoperative position the roller 12 occupies a position in the recess v.

After the sleeve P has been pressed rearwardly, however, by the coaction of the'lugs q and through the operation of the clutch 15 motion transmitted to the sleeve P upon which said cam V is mounted, the latter is caused to rotate, whereupon the roller '0 passes out of the recess 11 and rides against the outer face of said cam V.

fIOllL this time on and until the recess'v and roller 1) are again brought into the position in which they are illustrated in Fig. 8 said roller will prevent the sleeve P from moving forwardly and breaking the coaction of the two 5 members of the clutch. In other words,

from this time on the coaction of the two members of said clutch and the consequent rotation. of the sleeve P are independent of the coaction of the lugs g Q2.

3 I observe, here that the movement of the cam q due to the rotation of the worm T is preferably somewhat slower than the move ment of the cams It and V after the clutch has been thrown into operative relation. Due to 3 5 this, after said sleeve P has been set in operation the worm T is quickly thrown out of operative relation to the dial Q and the roller '2) as quickly brought into coaction with the face of the cam V to maintain the 4- m perative relation between the two parts of the clutch.

After the clutch has assumed operative posuion the sleeve P and gear P", carried thereby, will be moved one revolution.

When the recess 1) and roller '22 again come into coaction, the spring P forces the members'l? P of the clutch apart, whereupon the sleeve P and said gear P are again brought to a stop.

The gear P", meshing with the gear M, causes the operation of the intermittent shaft M and the gears carried thereby and coacting therewith, whereby the strip is ad vaneed one step. The first portion of this movement, however, does not effect the .'mo\'-'ement of the sensitized strip, because of the interval before the gear M coacts with the first. tooth of one or the other of the mutile-ted gears M M. During this portion of .the revolution of the intern'iitt-ent shaft M the cam in coacts with the forked end of the lever L to open the. shutters I through the ,mechanism heretofore described. Thocon- -L'tinued operation of the cam m by moving 5 the end of the lever L in the opposite direc- It follows that tion closes the shutters a moment before the coaction of the gear M with the mutilated gears i Z M, or one of them, by means whereof motion is transmitted to the feed-rolls. Consequently the remaining portion of the revolution of the shaft M and gears carried thereby is devoted to the operation of drawing forward a section of the sensitized strip to take the place of that which has been exposed. As this is accomplished the cam m again assumes the position in which it is illustrated in Fig. 4, the lever L being thereby operated to throw the shutters to open position for the next exposure.

W designates the shaft of the recording and indicating device. This is journaled at each end in the members A A of the frame, the forward end projecting through the front member Aand being here provided with an index to, coacting with a dial W, secured to the front member A of the frame and having suitable subdivisions and an indicating-slot Between the dial W and the frame A may be arranged visual indicathig-wheels 9a 00, mounted on the rear face of said dial W. The shaft W outside the frame A is provided with a collar carrying a tooth which coacts with pins formed on one face of the visual indicating wheel m Said wheel as is provided also with a tooth coacting with notches or recesses in the visual indicating-wheel x. As will be seen, each revolution of the shaft W and each coaetion of the tooth carried thereby with one of the pins of the wheel 0; will move said wheel 00 one step. Each revolution of the wheel as will move the wheel as one step. Both wheels as m may be provided with numbers discernible through the slot above referred to. By means of this visual recording device the number of exposures may be readily ascertained. Each subdivision of the dial W indicates one exposure and the sum thereof one hundred exposures. After one hundred exposures have been made the visual indicating-wheel 01; is moved one step, so as to expo. e the number 1, the cipher on the wheel :1; being exposed. This operation will be readily understood from the drawing in Fig. 1, in which the recording mechanism is shown as indicating 14-21.

Intermediate of its ends the recordingshaft W is provided with a ratchet W, said ratchet having one hundred teeth corresponding with the one hundred subdivisions on the; face of the dial \V. This ratchet and its operating mechanism are illustrated in detail in Fig. 6. lteferring to this figure, W designates a pawl mounted upon the crossbar A of the frame of the machine, the free end thereof coacting with the teeth on said ratchet NW. W indicates a second pawl having its free end coacting with the periphe1 y of the ratchet W, its other end being pivoted-to one end of a lever NV, also pivoted to the cross-bar A of the frame and having its free end extended into position to coact with the lug W on the rear face of the cam V. As will be readily understood, each rotation of said cam V will, by elevating the extended end of said lever W and depressing that end carrying the pawl W move the ratchet W one tooth and through the shaft W the recording mechanism heretofore described.

Y designates the platen or pressure device for the sensitized strip. The upper surface of this is preferably provided with a layer of felt, plush, or other suitable material in order that said platen may firmly grasp the strip and hold it in contact with the negative-frame and the negative mounted therein. Said platen Y is mounted upon a vertical shaft Y, carried'in a bearing Y secured to or formed integral with the cross-bar A of the frame. 1' designates a bracket secured to the hearing Y and in the bifurcated end of which is pivoted a lever 1 one end whereof is provided with a roller y, coacting with a cam 7 carried by a collar 2 on the sleeve P of the main shaft P. That end of the lever 1 opposite the roller y is provided with a screw yr, the adjustment whereof will determine the degree of upward movement of the shaft Y and the platen Y, carried thereby. Obviously upon each rotation of the collar P the cam if will, by engaging with the roller y, press the said platen upwardly into engaging position. This of course is at that period in the operation of the device when the sensitized strip is immovable and the shutters open for the exposure thereof.

The essential features of the operation of the machine have heretofore been set forth in connection with the description of the construction. It will be obvious that such opera tion is entirely automatic. After the sensitized strip has been placed in position and its free end connected with the takeup roll B the hood H (theretofore' thrown backward upon its hinge to permit the adjustment of such strip) is adjusted to the position in which it is shown in the drawings and the negative-slide, with the negative therein, inserted. The necessary period of exposure having been predetermined, the nut P is loosened and the index Q moved upon the dial Q to that subdivision indicating such period of exposure. The mutilated gears M" M are then so adjusted relatively to each other as to transmit to the feed-rolls E F sufficient movement to draw forward after each exposure a section. of the strip correspondmg to the size of the negative or to the portion of the negative printed from. Power being then applied, the exposure-determining device is operated in the manner hereinbefore described, the platen being'moved up wardly to clamp the sensitized strip during each period of exposure and downwardly to release said strip and permit it to travel forward to the take-up roll, the exposure registered and indicated upon the recording device, and at the end of the exposure the shutters closed and the feeding mechanism operated to move the strip forward one step. The operation in. addition to being automatic is uniform and continuous, the number of successive exposures and. the consequent production of prints from the negative being limited only. by the length of the sensitized film upon which such prints are made.

As above explained, the cam 11 and lug the cam V, and roller r, and the parts associated therewith operate the clutch so as to cause sleeve P to make one complete revolution at equal intervals of time. VVlit-n sleeve l makes one revolution, it first operates through lever L to close the shutters, then through the mutilated'gears to advance the sensitized strip a predetermined distance,

and tl'en t-.I'()Ugii lever ll to open the slutters again. Also the cam 1/ on sleeve l operates to lower the plat en Y just before tilt) sensitized strip is moved and to raise the platen again after toe strip has been brought to rest in its new position, so as to hold the strip firmly against the negative during the printng operation. As sleeve P begins its revolution the arm T of the frame T moves out of the recess in the cam l t, thus carrying the worm T out of engagement with the worm-wheel formed on the periphery of the dial Q, and the dial is retracted by spring Q to the position in wliich the lug thereon engages its stop. As the sleeve nears the conipletion of its revolution the arm T on frame T again enters the recess r in cam R and the worm T is again brought into mesh with the worm-wheel by spring Tie continued operation of the power-shaft actuates the worm T through the train of gearing, andthe index and sleeve Q are rotated until the lug g engages the lug 1;". The engagement of these two lugs causes movement of sloe ve P" axially on shaft P against the tension of spring P until the two members of the clutch are in engagement, and when this occurs shaft P drives sleeve P, causing the latter to make one revolution. As soon as sleeve P" begins to move it is held in the position in which the two clutch members are in engagement by the roller 7 coacting with the cam V; but when the sleeve P completes one revolution the recess v: in cam V is opposite tire roller 1", and spring P hen moves sleeve P axially on shaft P a sullicient distance to cause separation of the two clutch members, and tlius bring sleeve P to rest. The operation is repeated in. this way, tlie sensitized strip remaining at rest pressed against the negative during a definite interval of time, which interval is adjustable as desired, while the shutters are open and then the shutters being closed the strip advanced and the shutters opened again.

Having now described my inventlon, wh at I claim as new therein, and desire to secure by Letters Patent, is as follows:

1..- In printing apparatus, the combination with means for supporting a sensitized strip and a shutter, of a variable exposure-determining device and operable connections between the same and said shutter, substantially as set forth.

2. In printing apparatus, the combination with means for feeding a sensitized strip, of a holding device for said strip, a shutter, a variable exposure-determining device, and operable connections between said determining device, said stop or holding device and said shutter, substantially as set forth.

In printing apparatus, the combination with means for su porting a sensitized strip, a shutter, and a p aten movable into and out of operative relation to said strip, of mechanism for feeding said strip,.a variable exposure-determining device, and cooperative connections between said shutter, said platen, said feeding mechanism and said determining device, ibstan ially as set forth.

4.. In nt; ,apparatus, the combination with mea i for supporting a sensitized strip, a shutter, and a platen movable into and out of operative relation to said strip, of mechanism for feeding said strip, an exposure-determining device, a recording mechanism, and cooperative connections between said shutter, said platen, said feeding mechanism, said determining device and said recording mechanism, substantially as set forth.

5. In printing apparatus, the combination with mechanism for feeding a sensitized strip, of a' hinged hood in juxtaposition to which said strip is adapted to travel, a shutter within said hood, and means 'foroperating said shutter in either position of said hood, substantially as set forth.

6. In printing apparatus, the combination with means for feeding a sensitized strip, of a hood in juxtaposition to which said strip is adapted to travel, a two-part shutter Within said hood operable by gears upon the outside thereof, racks coacting with said gears, and means connected with said racks for operating said shutter, substantially as set forth.

7. In printing apparatus, the combination with means for feeding a sensitized strip, of a hinged hood in juxtaposition to which said strip is adapted to travel, a two-part shutter within said hood operable by gears upon the outside thereof, connected racks eoacting with said gears, one of said racks being pivotally mounted, and means for transmitting motion to said racks to operate said shutter, substantially as set forth. I

8. In printing apparatus, the combination with means for feeding a sensitized strip, of a hinged hood in juxtaposition to which said strip is adapted to travel, a two-part shutter within said hood operable by gears upon the outside thereof, connected racks coacting with said gears, a reciprocating shaft upon which one of said racks is pivoted, and means for imparting reciprocatory movement to said shaft, substantially as set forth.

9. In printing apparatus, the combination with means for feeding a sensitized strip, of'

a hinged hood, a shutter within the same, mechanism for opening and closing the same, and a detachable negative frame'or support intermediate of said shutter and said strip, substantially as set forth.

10. In printing apparatus, the combination with mechanism for feeding a sensitized strip, of a hinged hood, a shutter within the same and a platen, means for operating said shutter and for moving said platen into and out of operative relation to said strip simultaneously, a strip-feeding device, and connections between said means and said device for assuring interdependent operation thereof, substantially as set forth.

11. In printing apparatus, the combina tion of an intermittent strip-feeding device and adjustable mechanism coacting therewith for determining the extent of the intermittent movements of the strip, substantially as set forth.

12. In printing apparatus, t re combination of rolls carrying a sensitized strip, a guiding device for said strip, and a strip-feeding device comprising an intermitteiitly-operated shaft, gears carried thereby for i111- parting movement to said strip, and means for varying the extent of movement of said strip under the influence of said feeding device, said means including mutilated gears mounted side by side but adjustable relatively to each other, substantially as set forth.

13. In printing apparatus, an exposuredetermining device comprising the combination of a rotary shaft, a-dial and an index movable one relatively to the other, mecln'mism operated by said shaft for moving said dial an d index relatively, and means dependentupon the extent of relative movement of said dial and index for effecting an exposure, substantially as set forth.

H. In printing apparatus, an exposure determining device, comprising in conibiization a rotary shaft, a dial and an index, mech anism intermediate of said shaft arddial for operating the latter, and a retracting device for said dial, substantially set forth.

15. In printing apparatus, an exposuredelermining device comprising the combination of a rotary shaft, a dial and an index, actuating mechanism for said dial, operable connections between said she ft and said actuating mechanism, and means dependent upon the. extent of movement of said dial for effecting an exposure, substamially as set forth.

16. In printing apparatus, an exposure- IOC lIO

IIS

determining de ice, comprising in combination a rotary shaft, a dial and an index, a retracting device for said dial, .a worm for actuating said dial, and operable connections between said shaft and said worm, substantially as set forth.

17. Inpri'eting apparatus, an exposuredeterminiig device, comprising in combination a rotary shaft, a spring-retracted dial, an index, mechanism for actuati g said dial, means for throwing said mechar ism into and out of operative relation to said dial, and operablc cor-mentions between said mechanism and said means, substantially as set forth.

18. In pria'iting apparatus, an exposuredetermining device, comprising in combination a rotary shaft, a dial and an index, an actualitzg device for said dial receivirg motion from said shaft, ard conrections between. said i11dex and said shaft, whereby the setti g of the former will (lOtOTITllLB the duration of useful operation of the latter, substan tially as set forth.

19. In printing apparatus, an exposuredetermining device, comprising in combination a rotary shaft, a dial and an index, actuating mechanism for said dial operated by said shaft, a clutch upon said shaft, and a cam controlled by said indexand coacting with said clutch to throw the same into operative position, substantially as set forth.

20. In printing apparatus, an exposuredetermining device, comprising in combination a rotary shaft, a collar, a dial pivoted on said collar, an index secured to said collar and coacting with said dial, means for actuating said dial, a cam carried by said collar, and a clutch on said shaft adapted to be thrown into operative position by said cam, substantially as set forth.

21. In printing apparatus, an exposuredetermining device, comprising in combination a rotary shaft, a sleeve carried thereby, a clutch between said shaft and sleeve, a dial and an index, means for operating said dial, and mechanism controlled by said index for moving said sleeve and thereby throwing said clutch into operative position, substantially as set forth.

22. In printing apparatus, an exposuredetermining device, comprising in combination a rotary shaft, a clutch having a clutch member connected to said shaft a dial and an index, mechanism for throwing said clutch into operative position, and means controlled by the position of said index relatively to said dial for predetermining the duration of such operative position, substantially as set forth.

23. In printing apparatus, an exposuredetermining device, comprising in combination a rotary shaft, a clutch having a clutch member connected to said shaft, a springretracted dial, agstop therefor and an index coacting therewith, means for actuating said dial as said shaft is actuated, and mechanism brought into operative relation by said actuating means and governed by the position of said index relatively to said dial for throwing said clutch into operative position, substantially as set forth.

24. In printing apparatus, an exposuredeterniining device, comprising in combination a rotary shaft, a sleeve thereon, a clutch between said shaft and said sleeve, a dial and an index, an actuating device for said dial, and means controlled by said sleeve for throwing said actuating device into and out of operative relation, substantially as set fortl 25. In printing apparatus, an exposuredetermining device, comprising in combination a rotary shaft, a sleeve mounted thereon, a clutch between said sleeve and shaft, a dial and an index, an actuating device for said dial operated by said shaft, means for throwing said actuating device into and out of operative relation to said dial, a cam controlled by said index and operated by said actuating device with said dial, and connections between said cam and said clutch for throwing the latter into operative position, substantially as set forth.

26. In printing apparatus, an exposuredetermining device, comprising in combination a rotary shaft, a sleeve mounted thereon and carrying a power-transmitting device, a clutch between said shaft and sleeve, a dial and an index, an actuating device for said dial, a cam positioned by said dial and operated by said actuating device to throw said clutch into operative position, and a cam carried by said sleeve and coacting with said actuating device to throw the same into and out of operative position relatively to said dial, substantially as set forth.

27. In printing apparatus, an exposuredetermining device, comprising in combination a shaft, a sleeve mounted thereon, a clutch between said sleeve and shaft, a dial and an index, an actuating device for said dial, a cam positioned by said index and operated by said actuating device to throw said clutch into operative position, a cam upon said sleeve controlling the o eration of said actuating device, and a secon cam upon said sleeve holding said clutch in operative position after such position has been assumed through the operation of the cam first named, substantially as set forth.

28. In printing apparatus, an exposuredetermining device, comprising in combination a rotary shaft, a dial and an index, a continuously-operating actuating device for said dial, means for throwing said device into and out of operative relation to said dial, a clutch carried by said shaft, and mechanism for throwing the same intermittently into operative position, substantially as set forth.

29. In printing apparatus, an exposuredetermining device, comprising in combination a rotary shaft, a dial and an index, a continuously-operating actuating device for said dial, meansfor throwing said device into and out of operative relation to said dial, a clutchcarried by said shaft, mechanism for throwing the same intermittently into operative position, and a ower-transmitting device operated by sai shaft only when said clutch is in said operative position, substantially as set forth. I

30. In printing apparatus, the combina tion with means for supporting a sensitized strip and intermittent feeding mechanism therefor, of a platen coaeting with said strip, an exposure-determining device, a dial and an index therefor, and connections between said device, said feeding mechanism and said platen, controlled by said index, substantially ,as set forth.

31. In printing apparatus, the combinationwith means for supporting a sensitized strip, intermittent feeding mechanism therefor, a shutter and a platen, of an exposuredetermining device, connections between said device, said feeding mechanism, said shutter and said platen, and a dial and an index controlling the movement of said shutter, said platen and said feeding device, sub stantially as set forth.

32. In printing apparatus, the combination with means for supporting a sensitized strip, of feeding mechanism for the strip, connections to said mechanism for intermittently operating the same, and a lock for said mechanism adapted to preclude movement thereof in either. direction, substantially as set forth.

33. In printing apparatus, the combination with a sensitized-strip-supporting vice, of feeding mechanism, connections to said mechanism for operating the same intermittently, means for varying the extent of such movement, and locking mechanism thrown to operative position after each strip-feeding operation of said mechanism and coacting with said mechanism to preclude movement thereof in either direction, substantially as set forth.

34. In printing apparatus, the combination with sensitized-strip-feeding mechanism,

of a shaft, a sleeve carried. by said shaft, a

throwing the same into and out of operative relation thereto, and mechanism controlled by said index for throwing said clutch into operative position and thereby transmitting movement to said feeding mechanism, substantially as set forth.

35. In'printing apparatus, the combination with a sensitized-stripsupporting device, a shutter, a feeding device for said strip and mechanism for intermittently operating said feeding device and. shutter, of a shaft, a sleeve carried thereby, a power transmitting device connected with said mechanism, a clutch between said sleeve and said shaft, a dial and an index, an actuating device therefor and means for throwing the,

same into and out of operative position, and a cam positioned by said index and operated by said actuating device to throw said clutch into operative position and thereby transmit movement to said mechanism for intermittently operating said feeding device and shutter, substantially as set forth.

36. In. printing apparatus,' the combination with. a sensitized-stripsupporting device, a holding device for said strip, a shutter, afeeding device for said strip and means for intermittently operating said feedingdevice,

said stop and said shutter, of a rotary shaft,

a sleeve thereon, a clutch between said sleeve and shaft, connections between said sleeve and said mechanism, a dial and an index, an actuating device for said dial operated by said shaft, means for moving said device into and out of operative relation to said dial, and a cam positioned by said index and operated by said actuating device to throw said clutch i ntohoperative position, substantially as set ort i This specification signed and witnessed this 29th day of June, 1903.

FREDRICK II. AULD.

Witnesses:

FRED H. OozzENs, IIENRY BROOKE.