US1383733A - Film-developing rack - Google Patents

Description

WITNESSES nuHlJi I N. E. LUBOS'HEZ.

FILM DEVELOPING RACK. APPLICATION FILED MAR- 21. I919. RENEWED DEC- 27, I920- Patented July 5, 1921.

INVEN TOR.

AYTORJVEMS'.

UNITED STATES PATENT OFFICE.

NAHUM ELLEN LUBOSHEZ, OF LONDON, ENGLAND, ASSIGNOR TO EASTMAN KODAK COMPANY, OF ROCHESTER, NEVJ YORK, A CORPORATION OF NEW YORK.

FILM-DEVELOPING RACK.

Specification of Letters Patent.

Patented July 5, 1921.

.Application filed March 27, 1919, Serial No. 285,498. Renewed December 27, 1920. Serial No. 433,429.

To all whomit may concern lie it known that I, NAHUM E. Lunosrrnz, a citizen of the United States of America, residing at London, in the county of Essex, England, have invented certaln new and useful Improvements in Fllm'rDeveloplng Racks, of which the following is a full, clear, and exact specification.

My invention relates to a rackpr frame for supporting photographic film dur ng the processes of developing, washing fixing, or any other process in which the film 1s bathed. The object of the invention is the making of a simple and easily operated rack which is efficient for the purposes descrlbed.

Reference is now made to the accompany ing drawing in which like reference characters refer throughout to the same parts:

Figure 1 is a perspective view of one form of my novel rack;

Fig. 2 is a perspective view of a second form;

Fig. 3 is a cross section of a portlon of the rack shown in Fig. 1; i

Fig. 4 is a section taken on the line 4.-i of Fig. 1;

Fig. 5 is a section taken on the line 55 of Fig. 2, and

Fig. 6 is a section taken on the same line but with the movable bar in another position.

Fig. 7 is a fragmentary detail showing a modification.

The rack comprises a rectangular frame 1, which may be made of wood, fiber, or any other desired material. Upon the upper corners angle bars 2 are attached by wh1ch the rack as a whole may be supported from the edges in a suitable tank. The inner edges of the sides of the frame are grooved or rabbeted, as at 3, upon one face thereof. Mounted upon the frame are two L'-shaped members 4; the arms of the members extending along adjacent side bars of the frame. Each member 4: has a diz igonally arranged slot 5 at its elbow and also at the end of each arm. The L-shaped members or strips 4L are held against the frame 1 by screws 6 which extend through the slotso. When the L-shaped strips are moved toward the interior of the frame their edges will overhang the grooves 3, asclearly shown in Fig. 1, and when withdrawn leave the groove open, as shown in Fig. 3. The frictional engagement between the parts is such that the strip will remain in either adjusted position.

In use, the frame is laid down upon a flat horizontal surface with the strips withdrawn from above the grooves, as-in Fig. 3, and the film 7 is laid in place. Itis understood that films and frames are supplied in sizes corresponding to each other. The movable surips are then slid over the grooves and the rack placed in the tank. In the form shown in Fig. 2, a bar 2 extends across the top and its ends are used to engage the sides of the tank to support the rack 1, which consists of side bars 8, lower crossbar 9 and upper crossbar 10. In this form, which is made of sheet metal, the bars 8, 9 and 10 are struck to provide a groove 3 corresponding to the groove 3 of the first described form and having the same functions. Slidable L-shaped members 4: having slots 5 are held in proper position by the screws 6'. The slots may be of any desired or preferred form, such as to prevent the accidental slipping of the L- shaped members with respect to the frame. One such form of slot is shown in Fig. 7. It will be apparent that when the slot 5 is in its raised position and the screw 6 in the position shown in Fig. 7 it will be less liable to slip when the inclination of the part of the slot engaging the screw is less, as shown in this figure.

The frame as a whole is simple and inexpensive in construction and exceedingly easy to manipulate, but it holds the film securely during the operations. In Fig. 1 a film 7 is shown held in position and in Fig. 2 the L- shaped members are withdrawn, the rack being ready for the placing of a film therein. It is, of course, understood that this frame may also be used for plates as well as films, and the term plate as used in the claims includes any sensitized element.

Any modification included within the scope of my invention as defined in the claims are contemplated, and this disclosure is to be taken, to that extent, as illustrative.

Havin thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A developing rack comprising a frame with side and end bars, certain of said bars having ledges formed upon one side and along their inner edge upon which the edges of a plate may be laid and movable strips on said bars adapted to be moved into or out of position above said ledges.

2. A developing rack comprising a rectangular frame having suspending means at one end, the bars comprising the frame having on one side along their inner edge an open groove, strips mounted on said bars to slide over said grooves so as to form therewith channels opening toward the inside of the frame.

3. A developing rack comprising a rectangular frame having suspending means at one end, the bars comprising said frame hav ing ledges on one side and along their inner edge upon which the edges of a plate or sheet fitting within said frame may be laid and strips slidably mounted on the bars and movable into or out of a position overlying said ledges.

4. A developing rack comprising a rectangular frame, the bars comprising said frame having rabbeted inner edges on one face and two L-shaped members mounted to slide obliquely on the frame, the legs of each member when thus slid sin'iultan-eously covering or uncovering the rabbeted edges of two adjacent bars.

5. A developing rack comprising a rectangular frame, the bars comprising two adjacent sides having on their inner edges means for supporting the edges of a plate, the bars on the other two sides being rabbeted and carrying a strip having two legs at right angles to each other. the legs being adapted to be slid by a single oblique motion over the rabbeted edges of the two last mentioned sides.

Signed at London, England, this 27th day February 1919.

NAHUM ELLEN LUBOSHEZ.

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