US337547A - atkinson - Google Patents

Description

(No Model.)

R. E. ATKINSON.

TRAY BOB. DEVELOPING PHOTOGRAPHIO PLATES.

No. 337,547. Patented Mar. 9, 1886.

WITNESSES IN'VENTOR ATTORNEYS.

N PETERS, Phololiihogripher, Wnhinglcm D.c.

ilNtTE' STATES PATENT Oiwicn.

RICHARD E. ATKINSON, OF NEWV YORK, N. Y., ASSIGNOR TO E. 82 H. T. ANTHONY & CO., OF SAME PLACE.

TRAY FOR DEVELOPING PHOTOGRAPHiC PLATES.

=BPECIFICATION forming part of Letters Patent No.33'7,54'7, dated March 9,1886.

Application filed March 3, 1895.

To all whom it may concern.-

Be it known that I, Rronann E. ATKINSON, of the city, county, and State of New York, have invented a new and Improved Tray for Developing Photographic Plates, of which the following is a full, clear, and exact description.

My invention consists, principally, of a photographio developing-tray wherein the photographic plate itself or film thereon oonstitutes the bottom of the tray for retaining the developing-liquid, so that the plate-film being developed may be inspected without removing it from the tray.

The invention also consists in the employment of rubber or other flexible packing for forming a liquid-tight joint between the photographic plate and the parts of the tray; also in forming a reservoir at one end of the tray, and, finally, the invention consists of the special construction of the tray, and of the combination and arrangement of the parts thereof, all as hereinafter described and claimed.

Reference is to be had to the accompanying drawings, forming partof this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure l is a perspective view of my new developing-tray as it appears at the time of developing the photographic film. Fig. 2 is a longitudinal sectional elevation of the same held in vertical position for inspecting the plate; and Fig. 8 is an inverted plan View of the upper frame or section of the tray, showing the rubber packing.

My new developing-tray A is constructed to hold the photographic plate B, so that this plate constitutes the bottom of the tray for retaining the developing-liquid O. The plate B in this instance is held between the sections a I). These are, by preference, skeleton sections or framesmade of wood, rectangular in form, and in this instance are hinged together by the hinge c. The section a has the packing (2 of rubber or other suitable material, secured by tacks e or otherwise to the inner edges, so that when the sections a b are brought together upon the plate B and fastened the rubber dpresses upon the film on the plate and forms a liquid-tight joint.

Serial No. 157,676. (No model.)

At one end of the section a ,l form the reservoir D to receive the liquid 0 when the tray is held in vertical posit-ion, as shown in Fig. 2, so that the film may be inspected without removing it from the tray and without removing the liquid from the tray.

For locking the sect-ions a I) together I prefer to use a simple lock, composed in this instance of the wire f, attached to the section a, and the bail or handleg, hinged to the end of the section b, the handleg being adapted to be sprung over or upon the upper edge of the wiref, as shown in Figs. 1 and 2.

To assist in placing the plate B properly upon the section b,I provide it at its inner edge with the pins or studs it, against which the edges of the plate B are to be placed before closing the parts of the tray upon the plate.

By the use of this tray all necessity for handling the wet plates and getting the fingers in the developing-liquid is avoided, and the progress of development may be inspected without removing the plate from the tray, and the developing-liquid need not be removed from the tray until the plate is fully developed, as reservoir D serves to retain the liquid while the tray is held before the photographer for inspection of the film.

W'hen photographic paper or film is to be developed,it will be spread upon the plate B that forms a transparent bottom to the tray, and then sections a b will be closed uponthe plate and paper, causing the paper to be clamped at its edges and held fiat upon the plate B. In this manner the paper is held from curling while in the developing-liquid, and may be inspected without taking itin the hands or removing it from the tray.

Havingthus described my invention, I claim as new and desire to secure by Letters Patent- 1. A photographic developing-tray composed of open frames or sections hinged together, and combined with a packing or cushioning strip at their closing or adjacent edges to close upon the plate or film, substantially as and for the purposes described.

2. The photographic developing-tray A, composed of open frames or sections hinged together,in combination with the wire orlatch too f, attached to one sect-ion, and the bail g, at- 4. The section b, hinged tothe section a, and I0 tached to the other and adapted to engage provided with the studs h, substantiallyas and with the latch f, substantially as and for the for the purposes set forth.

purposes set forth.

5 3. Thesection a, provided with reservoir D, RICHARD E. ATKINSON.

packing d, and wiref, in combination with section b,hinged to section a, and havinghandie or bail g hinged to it, substantially as and for the purposes set forth.

Witnesses:

ELII-IU W. N. STARR, MARY G. BREWER.

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