US1231581A - Apparatus for the production of photographic negatives. - Google Patents

Description

E. H. FARMER.

APPARATUS FOR THE PRODUC'IION 0F PHOTOGRAPHIC NEGATIVES.

APPLICATION FILED OCT. 18| ISIS.

1,231,581. Patented July 3, 1917.

3 SHEETS-SHEET I.

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APPARATUS FOR THE PRODUCTION A0F PHOTOGRAPHIC NEGATIVES.

` APPLICATION FILED OCT. I8` 1916. 1,231,581. l

Patented July 3, 1917'.

3 SHEETS-SHEET 2.

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INVENTOR J QSI E. H. FARMER. APPARATUS FOR THE PRODUCTION 0F PHOTOGRAPHIC NEGATIVES. APPLICATION FILED ocT. Ia. 1916.

3v SHEETS-SHEET 3.

J5 @il i GOUMAVI/ ERNEST HOWARD EARMER, OF'LONDON,AENGLAND.

. APPARATUS FOR, THE PRODUCTION OF PHOTOGBAPHIC NEGATIVES.

Specification of Letters Patent.

Application led'OctoberlSl, 1916..v Serial No. 126,235.

To'all whom t may concern.'

Be it known that I, ERNEST HOWARD IFARMER, a subject of the King of Great Britain, residin r at London, in the county of Middlesex, England, have invented ceri tain new and useful IImprovements in Apparatus for the Production of Photographic Negatives; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same. t

My invention consistsin the novel features hereinafter described, reference being had to the accompanying. drawings which -illustrate my improved method and several forms of apparatus for carrying the same into effect, and the said invention is fully Av'ables one to make p other material,

disclosed in the claims.

The object of my yfollowing description and invention is to inclose -a photographic plate cut iilm onpaper, or

rovided with sensitized surface, within a light proof container, so that it may be exposed to the action of light for the purpose of producing a photographic `image without the prior need of a dark room and -further developing and fixing the photograph without removing itfrom the 'container whereby the subsequent use of a dark room is also rendered unnecessary, While at the same time the plates, films or papers are at all times injurious vapors, and finger marks.

My improved process and apparatus enotographic exposures and immediately develop in day light, in the field, or elsewhere away fromI the c o'nven` iences of civilization, if necessary, .so as to immediately produce the finished negatives and will be found particularly'desirable in educational work in the teaching of photographic work, andthe performance of such work under the'guidance of instructors, and also for the purpose of obtaining the imme- I- diate development of plates, films, or papers exposed by operatorson vacation when away from home, on camping expeditions, and research expeditions, and the like. v l' According tol one form of my invention, I

provide a simple .container of non-actinic material preferably comprising two sepa-l and sold protected from injury from A light`dust, dampness,

'by theiredgesor imscnsitized surfaces within the casing to the separable members thereof, and When closed and properly secured the container forms va light proof packing in which the-sensitized plates may be prepared by manufacturers, or into which they may be placed from the manufacturers package and from which they need not be removed until they are completely developed and fixed so as to be unaffected by actinic light.

The said containersare adapted to be inserted in suitable holders, or directly in the cameras, exposure of thesensitive surfaces being made by opening the container after it is placed in operative relation with Patented July 3, 1917.

the camera, the container being closed before 'suitable retaining and actuating mechanism so that the /separable members may be separated temporarily when in operative relaexposure of a sensitive surface.

My invention also contemplates other features and objects which will be more fully explained hereinafter.

For convenience of reference I will use the term plate hereinafter, in the specification and in the claims, 'as meaning the sensitive coating and the material supporting the same whether it be glass, Celluloid, paper, or other materialu- Referring to the accompanying drawing:

Figure l represents a sectional view of a photographic camera with which my ir'ution withy the camera to make the desired Y proved container i canbe conveniently employed showing one of the containers inplace preparatory to separating the members of the containerand exposing one of the plates affect the exposure of one of theplatesqcar- I detached.

ried thereby.

Fig. 3 is a sectional view illustrating a double lap holder which is. a pattern suitable for carrying out my method; together with an inclosed container carrying two plates.

Fig. 4 is a similar View of the container Fig. 5 is a similar vie'v'sT of a modified form of container which may be employed to accommodate four photographic plates.

5" Fig. 6 is asimilar view of another modilication of the container adapted, in this instance, to carry two photographic plates and being provided with a central light proof shield or partition between the opposed sensitive surfaces for rotecting one of the same while the other is being exposed in the camera.

Fig. 7 is a similar view of another modification of the container.

Fig. 8` represents a double flap plate holder provided with removable slides and capable of use in cameras operating with plate holders, the said holder being arranged to hold one of my improved containers, and expose the plates carried thereby. Fig. 9 is a perspective View of the plate holder with one slide removed.

Fig. 10 represents one of the containers, and illustrates one means for introducing the developing and xing solutions into the,

same.

.,Fig. 11 represents a sectional view of a developing tank showing one of my im proved containers inserted therein and illustrates one5 means of admitting the developing solution or other solution to the interior of the container.

Fig. 12 is a section showing another form of developing tank and one of my improved containers immersed therein, and illustrates themethod of introducing the liquid in the .tank to the interior of the container.

Fig.' 13 is a sectional view of another form of camera with which my improved container may be advantageously employed.

Fig. 14 is a view similar to Fig. l'showing a movable shield attached to the interior of the camera and adapted to be moved'into horizontal position to protect the plate-or plates not intended to be exposed. p

Fig. 15 represents a section on line 15--15 of Fig. 14.

Fig. 16 is view similar to4 Fig. 1 showing one means for retaining the partition member of my improved containerl in horizontal position during exposure.

Fig. 17 is a detail viewpartly in section showing a portion of the container, the partition member having'a part extending rearwardly'outside of the container and the retaining block for holding the partition member in horizontal position as indicated in Fig. 16.

Fig. 18 is a view similar to Fig. 1 showing another meansfor retaining the partition in horizontal position.4

Fig. 19 is a'detaiLview showing a portion of the camera illustrated in Fig. 13 and the lens tube therefor, said lens tube being movable to two focal positions.

In its simplest form illustrated, for example, in Fig. 4, my improved container comprises a casingwhich may be of cardboard or any other suitable non-actinic material, preferably formed in two parts or members indicated at 1 and 2, and having its edges provided with means for forming a light trap such as overlapping portions, 3 and 4, the portions 3 being attached to the member, 1, in Fig. 4 and over-lapping the portion, 4, which is attached tothe member,

2, very much after the manner of the manufacture of paper boxes and covers therefor. 5 and 6 represent two photographic plates having sensitized material, 7, on their inner faces and these plates are secured in any desired way to the members, 1 and 2, of thel container, for example, by means of suitable adhesive applied to the non-sensitized faces, or in any other desired way, which mally temporarily closed in any desired way as by a strip, 9, of non-actinic paper or other material.

For convenience in handling the containers the separable members thereof may be temporarily united and sealed together as by means of a strip or tape of paper or other material indicated at 10 extendin the edges-of the container and adhesively applied thereto which can be readily broken by the iingerl nail or a sharp instrument when the container is ready to be placed in operative relation with a camera, but the separabale members may be temporarily retained in closed position by 'any other suitable means.

In order to expose one of the sensitive surfaces, it is only necessary to rfplace the container within the camera or other light proof receptacle within the focus of a suitable lens around and separate the members of the casing so as to bring one or other of the plates into the. focal plane of the lens. Y Obviously ifI the container' is placed in a horizontal position within the camera the uppermost plate can be exposed by raising the upper member of the container, and the lower plate can be exposed b v reversing the position of the container and raising the member with which the other' plate is connected. If the container is placed in the camera in a vertical position, one plate can be exposed by lowering one of the separable members into horizontal position while retaining the. other in vertical position` and the other plate can be exposed b v reversing the position of the container while it is in closed position and replacing it within the camera. Suitable means are provided according to the circumstances of use Jfor retaining one member of `the container in fixed relation with the camera while the other member is provided with means to enable it to be acted upon by suitable `actuating means for effecting the separation of the two members.

For example, in Figs. 1 and 2 the members of the container are shown as provided on their edges with strips, 11, forming a groove or recess between the same to engage horizontal ribs, 12, provided on the interior of the lateral portions of the camera body, and the camera here indicated at 13 is provided with a removable back, 14, or closure to afford access to the interior for the placing of the container within the same. The two membersof the container' are preferably hinged together at one end to facilitate the opening and closing thereof, and where a tape, 10, for example, is applied all the way around thev container it may be broken only on three sides so as to provide a hinge on the fourth side, or a special hinge of cloth or paper may be applied to the container members,

The opposite end of the container will be provided with suitable means for permitting it to be acted upon by an actuating device. A simpleform of this is illustrated in Fig. 4 and in Figs. 1 and 2 in which the container is provided on its upper and lower faces with a strap or straps, 15, of paper or other suitable material to receive a tongue, 1G, carrying an eye, 17, which is engaged by a hook on the end of a draw rod, 1S, which, in this instance, extends through a sleeve, 19, located within an opening in the upper part of the camera and held therein by an elastic fabric, 20, so as to make it light proof, and at the same time accommodate the changes of position of the. draw rod, which may be a sti wire for example. The camera will, of course, be provided with a suitable lens indicated at 21. To effect an exposure under these conditions the container is placed in position in the body of the camera so that the lower member is held in place by the ribs, 12, and the draw rod, 1S, and slide, 16, are connected with the upper member as shown in Figs. 1 and 2. The back of the camera is then closed and the rod, 18, is drawn upward so as to bring the upper member of the container into vertical position, and the plate carried thereby into position to receive the image when the lens is uncovered.` As soon as the exposure is made the draw rod will be operated to again close the container which can then be safely removed from the camera turned upside down and replaced with the draw rod connected with the other member of the container when the second sensitive surface may be in like manner eX- posed and the container again closed.

To develop the plates within the container it is only necessary to introduce through theA aperture, S, a suitable developing solution and this may be accomplished, for example,

by means of a small funnel, 22, as indicated in Fig. 10, which may be conveniently provided with a vent, 23, or obviously the container itself might be provided with a vent opening also suitably closed by a strip or black paper on the interior like the inlet opening. The development may be determined by taking the time thereof or in any othersuitable way and the developing liquid may be poured out and a suitable fixing solution may be inserted in the same way, after which the plates can be removed from the container and washed, or can be washed while still within the container, as may be desired, and in some. instances, it may be found desirable to dry the plates and pack them for shipment or transportation without taking them out of the container from which it is only necessary to remove them for printing.

In Fig. 12 I have shown how the container maybe conveniently used in connection withI a developing tank indicated at 24 partially lled with the developing or fixing solution in which case` the container may be inserted in the tank with the inlet aperture, 8, at the bottom so that the developing or fixing liquid will be forced upward within the container, the air being permitted to escape around the edges of the separable members as the liquid enters.

In Fig. 11 I have shown another form of developing tank adapted especially for use i tically any type of camera by making slight variations in the camera structure to accommodate this novel container.

In Fig. 5, for example,l I have shown a form of container for holding four sensitive 15 plates and comprising the members, 1a and 2a, formed substantially as before described With a partition member, 30, which, as shown, carries or may carry a plate on each face of the same. Themembers, 1a and 2a, v may be provided with the 4straps, 15"-, or equivalent devices, and the partition member if it is to carry sensitive plates, as shown, is provided with a sleeve, 31, which may be engaged by the actuating mechanism such as the Wire, 18, shown in Fig. 1, for example. In using this form of container With four plates indicated at 5a, 5", 6a and 6b, the first exposure may be effected by raising the member, la, to expose the plate, 5,

f made by raising the partition member, 30, and the member, l, to expose the plate, 6a, Aafter which the device may be reversed in 'the camera and two similar exposures made for the plates, 6b and 5b, after Which all of the container plates may be developed by introducing the developer to the interior on one or both sides of the partition member, as indicated, through apertures 23a-#8, nor- 40 mally closed by the protecting strips, 9a-9 If this type of container, shown in Fig. 5,

is used for tivo plates only as 5a and 6 the partition member, 30, would serve conveniently to further protect the plate which is not being exposed while the container is open within the camera, and my invention y includes the ilse of a partition member when desirable. When the casings are `not rovided With partitions, a. movable shield attached to the interior of the camera is employed.

I have illustrated such a construction in Figs. 14 and 15, in which I have shown a shield of this character comprising in this instance a piece of Wire bent into rectangular form and comprising the members v70-71-72---73 to which is attached a piece o light proof material. 74, such as paper, cloth, or thin metal.y The member, 70, is conveniently mounted in a. groove cut in the side of the camera and is provided with an operating arm, 75, extending through an opening to the exterior, a groove and opening being covered by a strip or light proof paper or other material, 76. It Will be obviand a second exposure may be ous that after one member of the container has been raised to vertical position, in position to expose the plate carried thereby, the operator can actuate the arm, 7 5, and swing the shield into horizontal position to protect the plateor plates in the other member ranged to carry only two plates, 5C-6, and al,

I have also shown a central diaphragmor partition, 30a. The members, 1"-2b, are

provided With the straps, 15b, or equivalent devices for-enabling either to be'lifted to expose the attached plate and Where no y@ plates are attached to the central partition and one of the members is raisedI to vertical position to expose the plate connected therewith, the partition is kept in place by projections in the fixed part of the holder or camera, and I, have illustrated in Figs. 16, 17 and 18, two means for retainingthe partition in horizontal position when one of the members of the container is raised. In the form shown in Figs. 16 and 17, the centralwg partition indicated at 30b is provided with a central disposed projecting portion, 30,v which projects from the hinged end of the container. In this instance the camera is provided with a retaining blockindicated at 80 so arranged as to engage the under faceof the projection, 30, when the container is placed in the camera, and when the upper member of the container is raised the engagement of the-block With the pro- 11g p jection, 30, will prevent the partition from being lifted, and Will retain it in horizontal position, as shown. In Fig. 18 in which I have shown a partition similar to that illustrated in Fig. 5l provided with an exterior 115 sleeve, 31, I have shown the camera provided With a rock shaft, 81., carrying a hook or detent, 82, for engaging the sleeve, 31,

'of the partition, and holding it in horizontal position When the upper member of the 12, container is raised. The rock shaft Will be provided on the exterior of the camera With a thumb button indicated at 83, in dotted lines, or other actuatingmeans for rocking the sha-ft, 81, andv throwing the hook, .82, into and out of operative position. One or both of the members, 1-2", maybe pro-v vided With the. apertures; 8b-8b, normally closed by protecting strips, "-,9b for the introduction of the developing and other 1,231,581 p A E iuids and the edges of said members may Abe temporarily secured by marginal strips of gummed paper o r otherwise as previously described. l

In Fig. 7 I have shown another form of.

container in .which the light traps on the members, C- c, which carry the plates,

' 5d-6', are provided, the one with a marginal groove and the otherl with a marginal rib to fit within the same to form the light traps. In this instance, the groove is shown as formed by parallel pieces of wood or cardboard, 33, and the rib by a single piece of wood or card-board, 34. Thev two members may be held together by a paper strip gummed all the way around as indicated at 10, which may be partially destroyed at the tion'to serve as a hinge along one edge. One

plates and for convenience in exposing the plates I preferably employ in connection with my improved container an exterior flap holder as indicated in Fig. 3, which comprises vtwo members, LO-41, hinged together at 412 and provided with means to engage the camera or actuating devices for opening the holder, for example, inthis instance, the sleeves, 413-43, adapted to be-used in conjunction with the elevating rod, 18,'shown at Fig. 1l In thisinstance, each of the members, JEU-41, is provided with a sliding latch, 44, which can` be pressed forward into engagement with the strap, 15, on the container which is substantially of the form shown in Fig. 4, so that when one of the members, 40, is operated the corresponding member, 1 or 2, of the container .will be carried with it for the purpose of exposing the contained plate. The container may be removed from the holder and the plates developed by introducing the fluids through the aperture, 8, sealed by the strip, 9, as hereinbefore described. When this ap holder is employed the container need not be hinged.

In Fig. 8 'I have shown one manner in which my improved container can be readily employed in connection with the typef'of plate holders having movable slides. In thisl ligure, 50 represents the plate holder which is-of ordinary form and provided with the removable slides, 5-1-51, which may be protected by light valves (not shown) ina well Aknown way. The central partition which is normally in this type of plate holder is dispensed with and the interior of the holder is provided with two movable wings, 52,-52, the lower ends of `which are provided with extensions, 53, adapted to `lit into the straps, 1&5, for example, of a hcontainer ofthe type shown inr Fig. 4, which is time the device is to be used leaving a por? shown in connection therewith, so as to unite Y.

one of the wings, 52, with each of the members, 1 2, of the container. The wings, 52-52, are pivotally mounted within the plate holder by means of a spindle, 54, and a sleeve, 55,- surrounding the same, one of the wings being secured to the sleeve.y and the other to the spindle, and the sleeve and spindle being provided with separate actuating arms, 56-57, at one end of the plate holder. To insert the. container it is only necessary to remove one-of the slides, 51, and turn the wings outwardly so that the container may be inserted between them, and thus placed in the plate holder when the slide, 51, will be ,restored Obviously the plates, 5 6, may

the slides while the plate holder is in operative relation with a camera and rocking one of the wings, 52, into horizontal position so as'to exposethe plate on the other halfof the container, Aand vice-versa. The plates may be developed as hereinbefore described by removing the container from the holder.

'In .some instances as where a folding type of camera is employed both members of the container may be secured to separable members of the camera 'so that the opening of `thecamera into operative position will also open the container and bring one or" other of the plates carried thereby into `operative relation with the lens. Thus in Fig. v13 Iy have shown, for example, a folding camera having hinged members, 60-61, each of which when provided with a sliding latch, Gli-64, adapted to engage the retaining'debe readily exposed by withdrawing -one of vice or` strap, for example, 15, as shown, as, A

I have illustrated in this connection the type of container shown in Fig. 5. 62 represents the lens, Vand 63 represents a bellows portion which may be detachably connected to one of the members as at 63@ to permit the insertion and reversingof the container.l If only two plates are carried by the container the opening of the camera will bring one of these plates into operative relation with the lens, as the two members, u, of the containerl are connected to the hinged members of the camera. If the central partition is used, as shown, and carries additional plates, the member, 61, may be provided with an ad`4 ditional retaining device as the hook, 65, to engage the sleeve, 31, of thecentral partition, 30, when it is desired to expose one of the plates connected with the partition. If

' plates are carried' by both the members, 1a-

28, of the container as well asby the central given a range of movement backward and ,forward' with respect to the. camera in any well known or desired manner to accommopartition, the lens, 62, may, for example, be Y date the change of focal distance between a A For example, in Fig. 19, I have shown the I lens, indicated at 62, mounted in a lens tube, 62", provided with stop lugs or collars, 62, and' 62, the lens being movable longitudinally through the supporting opening in the front of the camera and the lugs or stops, 62-62, being so arranged as to arrest the tube and lens in the two proper focal positions. For example, when the lens tube is drawn out until stopped by the lugs orv col- Qlar, 62d, it will be in proper focal relation ties of photographic apparatus. -The advantages of being able to purchase photographic plates,` (films or papers) in a container which is light proof and in which they may remain While one or more of the various steps of exposure, development and fixation can be carried out in rapid succession so as to produce when desired a finished negative withinl a few moments after exposure, without the use of a dark room, will be so apparent to those skilled in the art that they need not be enlarged upon herein.

-What 'I claim and desire to secure by Letters Patent is:

' provided with' exterior devices for engaging- `vmeans'jin-a camera orv holder'for separating .5e-such members -to-expose 'a photogra hic surffacawithinthe same, landa lig 'fclosaw. f9.1"

' 1 '3. {A1-2pac:

1. A packing container'for merchandising and storing photographic surfaces ready for immediate use in a camera, and also developing, if required, without .removal therefrom or the use of a dark room, consisting of a destructible light proof receptacle formed of two separable members, said members being or the use of a dark room,-

provided with devices for engaging means in a camera or holder for separatlng said 'members to expose av photographic surface within the same, and a destructible sealing means for holding said members in closed relation.

2. A packing containerformerchandising and storing photographic surfaces ready for immediate use in a camera and also developing, if required, without removal therefrom, 'consisting of a destructible light proof .receptacle .formed of two separable members, `and provided with an aperture for theintroduction of liquid intotlie same, saidv members. being t proof aperture. A e" tam r for'merchandising Vand stormgphotographicsurfacesrreadyfor I immediate use in a 'carner'aand also developing, if required, without removal therefrom, orthe use of a dark room, consisting of a destructible light proof receptacle formed of two separable members and provided with an aperture for. the introduction of liquid into the same, said members being provided with exterior devices for engaging means in a camera or holder for separating said members to exposel a photographic surface within the same, and a destructible light proof sealing device for closing said aperture.

4. A packing container for merchandising and storing photographic surfaces ready for immediate use in a camera and also developing, if required, without removal therefrom, or the use of a dark room, consisting of a destructible light proof receptacle formed of two separable members, and provided with 'an aperture for introducing liquid into the container, and means for preventing the admission of light to the interior of the container through said aperture, said members being provided with devices for engaging means in a camera or holder for'I separating said members to expose a photographic surface within the same, and means for protecting a photographic surface within said container from accidental exposure while said members are separated.

5. As a new article of manufacture,- a photographic package for merchandising, exl posing and developing photographic sur,- faces without removal therefrom, or use of a dark room, comprising a destructible light proof receptacle formed of separable members, a plurality of photographic surfaces rigidly connected with separable portions of the container, and maintamed at a distance froml each other, and fromall parts of the package to provide .a space adjacent to each of said surfaces co-extensive therewith to permit the liquidintroduced to freely pass over all portions of the photographic surfaces within the container, the members of the container being provided with devices for engaging means in the camera or holder to separate said members and expose the photographic surfaces within the same.

6. A packing container for merchandising and storing photographic surfaces ready for immediate use in the camera, and also de veloping, if required, without removal there' from, or the use of a dark room, consisting of a destructible light proof receptacle formed of two separable members, said members .being 'providedwith devices for engaging means in a camera orholder for separating said members to exposea photographic surface 'within the same, a centrally located light proof partition separable from both of said members, and introduced 'between'them, anda destructible sealin for holding said .separable mem ers in l closed relation.

. 7. A packing container for merchandising 130 means *65, 12. In aphotographic apparatus, the com,-

and storing photographic-surfaces ready for immediate use in a camera, and also develop- 1ng, if required,fvvithout removal therefrom,

l or the use of a dark room, consisting of a. 5 destructible light proof I 'said members to expose a photographic surio face Within the same, a centrally located light proof partition separable from both of said members, and introduced between them,

said container being provided With an aperture for introducing liquidinto the container, and means for preventing the admission of light through said aperture into the interior ofthe container.A .g l

8.A A container for --a photographic plate, comprising a light proof inclosing body consisting of separable members, means for hinging said members together on one edge,

retaining straps secured to said members adjacent to an opposite edge ofthe container,

and means for introducinga liquid into the container.

, '9. A packing container for merchandising, exposing and developing photographic surfaces Without removal therefrom, or use l of a dark room, consisting of a destructible light .proof receptacle formed of two separable members, and a permanent holder for said container, provlded with separable members, each of said members of the holder beingl provided With meansfor temporarily 35 securing it to a member of the container, and

with a device for engaging`means' in a camera for separating the members of the holder and container simultaneously to1 eX- pose a photographic surface Within the con- 4`0 tainer, l0. In ya photographic apparatus, the combination with a light proof container, comprising separable members having means for detachably connecting each of said members, of a holder for said container comprising a double flap, body, both flaps of said body being provided' With`-means vfor enablingeither of themto be detachably -engaged With actuating means for opening said holder, With retaining means for ho'lding either of them in position lduring eX- posure and with means for detachably engaging them with the separable members of the inclosed container.

l1. In a photographic apparatus, -a lightproof container for a photographic plate'or plates, comprising separable members hinged together, and provided with means for the introduction of developing liquid, means for detachably engaging one of said members to hold it, and means movable with respect thereto for detachably engagingthe other member to open the container and expose the.plate therein.

for introducing'liquid into and with means for d .-bination with a light proof container, comprising separable members, a retaining de- `vlce for each of said members, and-means for holding either one of said members, said container being provided fwith an aperture the same, and means for preventing lthe admission of light through vsaid aperture to the interior of the container' and a longitudinally movable lactuating rod for engaging the retaining device of the other member for opening said container. n

13. In a photographic apparatus, the co`mbination With a light proofcontainer, com-' u prising separable members, a retaining device for each -of'saidmembers, means for holding'either one of said members and a longitudinally movable actuating rod vfor engaging the retaining( device of the other member for opening said container. 3'5 14. The combination With a container for aphotographic plate, comprising a light proof -inclosing body, provided with la movablevportion for opening said Jbdy to expose the plate, said body being provided With an 'y aperture for the intr duction of liquid, and light proof means fo temporarily closing said aperture, of a holder for said container, comprising a double Hap body, both flaps of said body being provided With means for enabling either of them tQ be detachably en` gaged With actuating means for opening said holder, with retainingineans for holding either'of them( in position during exposure them with the separable members of the inclosed container.

' l5. The combination With acontainer for` 'a photographic plate, comprising a light proof inclosing body, provided With a movable 'portion for opening said body to expose Athe plate, said body being provided with an aperture for the introduction of liquid, and a destructible closure for saidaperture, of a holder' for said containerg comprisin a 110 double iiap body, both aps of said body eing provided With means for enabling either of them to be detachably engaged With actuating means for opening said holder, With retaining means for holding. either of them in position during exposure and with means for detachably engaging them with the separable members ofthe inclosed container.

1b. The combination With a container for a photographic plate, comprising a`l-ightv proof linclosing body, ,provided with va movable portion for opening said body to expose the plate, saidV movableportion being provided With `r'neans for enabling it to be connected With actuating means for opening 12a said container, of a ,holder for said Container, comprising -a double-Hap body, bothv flaps of said body lbeing. provided with means for enabling either of them to be detachably engaged with actuating means for 130.

tachably engaging 100 opening said holder, with retaining means for holding/either of them in osition during double iap body, both iaps o said bodyV being provided with means lfor enabling either of them to be detachablyfengaged with actuating means for opening ysaid holder, with retaining means for holding either of them in position during exposure and with means for' detachably engaging them with the separable members of the inclosed container.

18. The combination with a container for photographic plate or plates comprising a light proof inclosing body, having separable portions for opening said body to expose the plates aiid a centrally locatedlight proof partition separable from both separable portions of the containers and introduced between thennof a holder for said'container, comprisin a double flap body, both iaps or" said body eing provided with means for enabling either of them to be detachably en` gaged with actuating means for opening said holder, with retaining means for holding either of them in posltion duringexposure and with means for detachably engaging them with the separable members ofthe-inclosed container.

19. The vcombination with a container'for a photographic plate, comprising a light proof inclosing body, having separable portions for-openingl said body to expose the plate, a centrally located light proof partition separate from both separable portions of the container and introduced between them, said container'being provided with an aperture for introducing a liquid into said container to develop the photographic plate.

or'plates therein, and means forv prevent-ingr,

the admission of light through said aperture to the interior of the container, of a" holder for said 1 container, comprising. a double flap body, both flaps of said body being provided with means for enabling 'either of them to be detachably engaged with ac vlce a double iap body, both iiaps of said body being provided with means for enabling ture. tuating means forv opening Vsaid holder, vwith:`

retaining means for holding either of them in position during exposure and with means for detachably engaging them with the sepa- A rable members of the inclosed container.

20. The combination with a lcontainer for a Aphotographic plate, comprising a lightl proof inclosing body consisting of separable members, means for hinging said members together on one edge, retaining straps secured to said members adjacent to an opposite edge of the container, said container .being provided with an aperture for introducing a liquid into the container, and

' means for-preventing the admission of light through said aperture to the interior of the container, of a holder for said container, comprising a double iiap body, bothiiaps of said body being provided with means for enabling either of them to be detachably engaged with actuating means for openlng said holder, with retaining means for holding either of them in position during exposure and With means for detachablyengaging them with the separable members of the inclosed container.

21. The combination With a container for photographic plates comprising a light proof inclosing body consisting of separable members, retaining straps secured to said members anda holder for said -container provided with securing devices for engaging said straps, said holder comprising a double liap body, both iiaps of said body beirg providedy with means for enabling either o t tuating means for opening said holder, With retaining means for holding either of them em to be `detachablyN engaged With ac in position during exposure and with means rable members of the inclosed container.

22. In a photographic ap aratus, -the combination with a light proo container, comprising separable members, a retaining defor each of said members, comprising either of them to be detachably engaged with actuating means for opening` said holder- With retaining means for holding either o them inposition during exposure 'and with meansl for detachably engaging them `With the .separable members of the inclosed con- 1 tainer, means for holding either one of said flaps, and a longitudinally movable actuating rod for engaging the other flap for iis opening said `holder and container simult taneously2 tesmmonygvvhereof aiiix my signa--

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