US777701A - Photographic developing apparatus. - Google Patents

Description

No. 777,701. A PATENTED DEC. 20, 1904. W. THOMAS. A PHOTOG'RAPHIG DEVELOPING APPARATUS.

APPLIOATION FILED JULY 2. 1903.

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way-:rucsscs F-NTOR 7mm 7 w m M M W a UNITED STATES Patented December 20, 1904.

WVILLIAM THOMAS, OF GERALDINE, NEIV ZEALAND.

PHOTOGRAPHIC DEVELOPING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 777,701, dated December 20, 1904.

Application filed July 2, 1903. Serial No. 164,061.

that may be easily carried with a camera and by means of which plates or films may be developed in day or artificial light without having access to a dark room. For the purpose of transferring the plates from a'camera to the developer any portable changing bag or frame may be employed. Once the lid of the developer is put on the plate or film may be developed in actinic light.

In order that the invention may be thoroughly understood, reference is made to the accompanying drawings, in which- Figure 1 shows in perspective the developing-box for plates, and Fig. 2 is a plan from below of the inside of the lid portion, while Fig. 3 is a view of the dish.

In the figures, e is the dish, and f a nonactinic plate in the floor of same. Closely fitting over eis the lid g, that is likewise provided with a non-actinie' plate 7L and a hinged lid /L/ for closingoversame to prevent fogging of the negative. Upon the outside of g are funnels y' that screw into or are otherwise respectively attached to tubes 76 within lid 9. Said tubes have discharge-orifices Z Z, andv a discharge-tube m is for the purpose of discharging the liquid contents of the box that have been inroduced thereto through said funnels and tubes.

In the treatment of plate-negatives I provide two dishes to each lid, and I form my dish as shown in Fig. 3. A slot 72- is made in the side of the dish, and ledges 0 0 are formed within the same. When the plate has been treated, the dish may be detached from the lid and an opaque cover of any material inserted in slot 7, so as to rest upon the ledges 0 0 while the plate in the dish will be fixing.

In operation photographic plates are placed within the box a and lid g securely placed over the same and a suflicient quantity of the developer liquid poured through the funnel 7'. The liquid on leaving the funnel traverses tube Z: and empties through orifice Z. The plate or film is then treated in the ordinary way, and the operator will be enabled to gage when the negative is done by holding the box up to or over a light, when by virtue of the transparent plates in each side of the box he will be able to see right through it, and consequently through the negative. If the solution requires adjustment, it can instantly be done by strengthening or weakening it through either funnel, and when done with the dish a may be washed out by delivering water through either funnel and decanting it through the tube m, the outer end of which is elevated so that a continuous stream of water can flow through the box to wash the plate. The plate is fixed by introducing the fixer chemical through the funnel pipe 71/, and orifice Z, and the negative will have gone through the process of development without it being necessary for the operator to touch it.

In the treatment of ribbon-films it will be observed that each film-picture can, if desired, be treated scrz'azfim. In treating such film-pictures individually it will be possible to develop each according to circumstances. When a number of films are treated in a closed box, some will be underdone and others will be overdone, according to the light variations at the time the pictures were obtained; but with my invention it is unnecessary that a given actinometer-measured exposure be taken, as the requirements of each picture can be ascertained while it is undergoing development in my box and the treatment regulated accordingly.

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In an apparatus for developing sensitive photographic surfaces, a dish having a nonactinic plate in its fioor, a lid having a similar plate therein adapted to fit over the dish, tubes secured to the under side of the lid and extending from end to end thereof, and having delivery-orifices at one end thereof, funnels secured to the lid and connected with the other ends of the tubes so as to prevent the entrance of light, and adischarge-pipe having providing means for introducing an opaque its outer end elevated. plate and for supporting the same, as and for 2. 1n apparatus for developing photothe purposes specified. graphic plates and films apart from a dark In testimony whereof I have signed this 5 5 room, a dish having a non-actinic plate in its specification in the presence of two subscribfloor and a lid adapted to fit over the dish to ing witnesses. form an actinic light-proof box, means in the r 1 lid for introducing liquid reagents to the dish TILLIAM lHOMAb' which dish is furnished with a longitudinal \Vitnesses: IO slit in its side and an inwardly-turned strip P. M. NEWTON, of metal lengthwise of the dish, the whole M. E. EYES.

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