US925338A - Daylight developer. - Google Patents

Description

A. HAMBURGER n H. IMHO?.

DAYLIGHT DEVELUPER..

APPLICATION FILED Nov.1a, 1908.

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sra-iras retentir ariesG ALFRED HAMBURGER AND HEINRICH IMHOF, OF VIENNA, AUSTRIA-HUNGARY.

DAYLIGHT DEVELOPER.

clear specification, reference being had to the nccompailying drawing.

,the subject matter of the present invention is a daylight developer in which the placing or laying in of plates can also be otter-ted.

rEhe essential feature of the invention consists in the fact that the vessel receiving the developing or tixng fluid which vessel is provided at opposite sides with red windows, is composed of two parts capable of being drawn out and connected in a lightproof manner, between which parts by cX- cluding the light, preferably in using a, leather tube the pla-cing` or laying in of the plates can take place.

@n the drawing which represents, by way of example, a form of construction of the subject mattei' of the invention, Figure l shows a cross section, .T 2 shows a longitudinal section, Fig. shows the plan, ifi -l and 5 show perspective views and llig. t3 shows a detail.

rl`he vessel intended for the reception of the developing or fixing-fluid consists of two trough or basin-shaped parts o and 7) similarly formed, each face or bottom of which shows a red window li. The edges /it of these parts of the vessel facing each other are out vard y formed like tianges and can be pressed against each ot-her by clamps n. letiveen the langes f: packing pieces Z are placed which are formed as guides for a displaceable glass plate m, which divides the chamber formed by the parts of the vessel placed one over the other, into two watertight separate compartments. The abovemeutioned parts u, 7), are inserted into a tube c, which is impervious to light, in such a manner that their faces project out through openings in the tube which openings are placed opposite each other. The edge of each one of these openings is held against the wall of the respective vessel-part a. or 7) in a light-proof manner. the said parts each having a groove c into which the edge v' is pressed by means of rectangular Specification of Letters Patent.

Application filed November 18, 1908.

Patented June 15, 1909.

Serial No. 463,216.

frame, the ledges or rails (l of which can be tightened against each other. This tightening of the frame is facilitated by the ends of two opposite pieces having each a tapered continuation j (Fig. t3) and the two other joining pieces for the reception of this continuation have each a corresponding opening g, so that by drawing the la mentioned pieces together the frame is contracted on all sides. rlie final position of the frameparts can then be secured in a manner which can be easily relaxed, for example, be secured by cones or keys. Each of the two vessel parts c and 7) is provided with a supply holder o in which the developing fluid employed can be collected when not in use. ein inlet pipe or funnel y) is joined to the bottom of the supply holder and is of an undulated or spiral shape in order to prevent the light from penetrating` into the interior of the vessels o, when filling the supply-holder.

The manner of employing this invention is as follows: rlhe vessel parts a and D of the developer are, in the first place, brought into the position illustrated by F ig. d and are held apart by brackets i. rl`hen the back is placed in through the opening s of the tube c (which opening is provided with an elastic band) into the chamber formed between the vessel parts a and 7). The operators arms are now stretched through the openings s the edge of which by reason of the rubber band presses closely to the arms so that no light can penetrate into the tube. rlhe removal of the photographie plate within the apparatus described, at the same time preventing the admission of light can therefore be etl'ected. The photographic plate t is placed upon the glass plate m, the brackets fr are removed and both parts c and b are connected by the clamps n. While the vessel is in the upright position the developing fluid is poured through the funnel or tube 71 into the supply-holder and the funnel p is then closed. lf the vessel is now placed in a horizontal position, the fluid contained in the supply-holder flows over the photographic plate and the developing can now be done in the manner known. For the purpose of easily observing the progress of this process the holdervcan be brought into such a position, say perpendicular, so that light can shine through. lf the developing procis finished, the funnel or pouring-in tube is turned around downwardly and the developing fluid is allowed to flow off. In the same way as with the developing` fluid water can now be poured into the supplyholder and the plate rinsed. After the water is removed and the clamps n are relaxed, the plate or slide m is drawn out by means of the handle u and the photographie plate descends into the lower vessel-part l). r-rfter removing the slide and tightening the clamps for pressing` both vessel parts ci and 7) together, the fluid employed for xing is poured into the supply-holder of the vesselpart l) and the fixing of the photograph is then effected. The removal of the completely finished plate is most advantageously effected after the removal of the tube c.

its the plate m is preferably held in watertight manner one of the parts can be used for developing and the other for fixing at the same time.

-Iaving now described our invention what we claim and desire to secure by Letters Patent is l. An appliance for developing photographs consisting of a vessel formed of two parts each provided with red glass surfaces, said parts being connected together by lightproof material and capable of being fixed l together and at a distance from each other, a light-proof aperture being provided in the lightproof material through Which the plates can be passed into or withdrawn from either of the said parts.

2. A photographic daylight developer in which a vessel consisting of two parts having red glass surfaces is provided, said parts being connected together by light-proof material and having attached to them holders into which the fluid used for developing can b'e placed when not in use.

3. A photographic daylight developer having two parts with red windows connected together by light-proof material and divided by a glass plate, each part being in separate communication with a holder into which the developing fluid can be placed, said holders having flexible tubes for filling and emptying purposes.

In testimony whereof we affix our signatures in presence of two witnesses.

ALFRED H MBUR( t lll R. HEINRICH IMHOF.

ini-tunen, KARL, Itomzr IV. I-lmNcAirrNnn.

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