US836928A - Shutter for photographic-printing frames. - Google Patents

Description

PATENTED Nov. 27, 1906.

SHUTTERPOR PHOTOGRAPHIG PRINTING FRAMES.

APPLICATION FILED APB. 7, 1906.-

1N VENT 0R.

Ja/m 'Kaul fil/Ll/c ATTORNEY WJTNEZi; W IW THE NORRIS PETERS co,, WASHINGTON, n. c.

-UNITED STATES JOHNKAUT, or ST. Louis, MISSOURI.

SHUTTER FOR PHOTOGRAPHlC-PRINTING FRAMES.

Specification of Letters Patent.

. Patented Nov. 27, 1906.

Application filed p 7,1906. Serial No. 310.490.

To all whmn it may concern:

Be it known that I, JOHN KAUT, a citizen of the United States, residing at St. Louis, State of Missouri, have invented certain new and useful Improvements in Shutters for Photographic-Printing Frames, of which the followingis a full, clear, and exact description, reference being had to the accompanying drawings, forming a part hereof.

' My invention has relation to improvements in shutters for photographic-printing frames; and it consists in the novel -construction and arrangement of parts more fully set forth in the specification and pointed out in the claims.

In the drawings, Figure 1 is a rear or inside elevation of the shutter in its closed position with a portion of the frame in which the shutters.are mounted. Fig. 2 is a front or outside elevation thereof. Fig. 3 is a vertical section on line 3 3 of Fig. 2. Fig. 4 is a similar section showing the shutters, however, forced open by the insertion of the printing-frame. Fig. 5 is a horizontal section on the line 5 5 of Fig. 3. Fig. 6 is a horizontal section on line 6 6 of Fig. 4. Fig. 7 is a perspective view of the metallic jamb to which the shutter or wing is hinged, and Fig. 8 is a face elevation of the shutter adjacent the hinge-line.

The present invention has its specific application in connection with photographicprinting frames where artificial light is employed for printing the positives. This light, as is well known, is very injurious to the eyes, being either a mercury incandescent light or a lime-light suspended in a chamber whose walls constitute the means for supporting the negatives during the printing operation. During the insertion or removal of the negafive-supporting frame the glare of the artificial lig t injures the eyes, and it is the object of the present invention to provide means for excluding the light from the eyes of the operator during the removal of the printingframe. In detail the invention may be described as follows:

Referring to the drawings, F represents the framework of the chamber within which the artificial light is suspended, said frame being composed of a series of individual frames or sections for supporting the printing-frames Pthat is to say, the frames carrying the negatives N, from which the positives are printed. Disposed along the opposite sides of each section of the main frame F is a metallic angle-piece 1, serving as a jamb for the door, 'wing, or shutter 2, which shutter is made of any suitable light opaque material, clenched at its hinge-line by a reinforcing-strip 2, terminating in hinge-pins or spindles 3. These spindles or pins 3 are inserted into the perforations of the terminal ears 4 4, formed along the rear member or leg of the angle-plate 1, said leg terminating in a horizontal loop 5 at the lower edge thereof below the bottom ear 4. The side leg or member of the angle-plate or jamb is provided with a perforated ear 6, and the front face of the reinforcing-strip 2 has formed thereon a perforated ear 7. Through the ear 6 is passed the lower inclined portion ofa resilient or spring rod or wire 8, the said rod being continued downward behind the rear wall of the frame F and bent outwardly and inserted into the open loop 5 of the amb. The upper portion of the rod 8 is bent outwardly into the form of a U-shaped arm or offset 8, whose terminal is subsequently passed upward through the ear 7 of the dooror shutter 2.

Each section or window of the frame F has disposed along the outer faces of its upper and lower members a flanged ledge 9 for the support of the lower edge of the printing-frame P, the top of the frame snugly fitting against the bottom of the next succeeding ledge 9, Fig. 4, and when the frame F is once inserted in position it is temporarily locked in place by the rotatable latch 10, carried by the flanged face of each ledge.

The operation of the device is as follows: In the first place it is to be observed that the position of the ear 7 is to one side of the hingeaxis of the shutter 2 and that the rod 8 is resilient. The stifiness of the rod 8, being that the same is coupled, respectively, to the shutter or door 2 and to the stationary amb thereof, keeps the shutter closed, the arm 8 projecting outwardly to a point substantially in the plane of the outer faces of the flanged portions of the sup orting-ledges 9 9, so that when the printingrame P is inserted into position in the ledges of the supporting-frame F, Fig. 4, it forces the arm 8 of the rod 8 inwardly, this action at the same time forcing or swinging the door or shutter 2 to an open position. With the shutters thus open, the

rays from the artificial light within the chamber of the frame F are free to impinge against the negative N, and thus print the picture. In removing the printing-frame P the resiliency of the rod 8 automatically closes the IIC shutters, thus cutting off the rays of light before they can do any injury to the eyes of the operator.

Having described my invention, what I claim is 1. In combination with means for supporting a photograph-printing frame, suitable doors or shutters normally closed upon removal of the frame from such supporting means, and intermediate connections be tween the shutters and frame for forcing the shutters to an open position upon the insertion of the frame on its supporting means, substantially as set forth.

2. In combination with means for supporting a photograph-printing frame, suitable shutters interposed between the source of light and the negative mounted in the frame, and devices for forcing the shutters to an open position to admit the light-rays to the negative for the supported position of the frame, and for automatically closing the shutters upon removal of the frame from its support, substantially as set forth.

3. In combination with a hinged shutter adapted to be interposed between a source of light and a photograph printing frame, means for normally closing the shutter, and devices for'forcing the shutter to an open po sition upon the mounting of the frame in position for the printing of the positive, substantially as set forth.

4. In combination with a frame having shutters hinged at opposite sides thereof, a perforated ear disposed on the inner face of each jamb, a perforated ear disposed at one end of each shutter at a point slightly beyond the hinge-axis thereof, a resilient rod passed through the perforation of the jamb and having one end inserted through the perforation of the ear on the shutter, means for securing the opposite end of the rod to the frame supporting the shutters, a bend or arm formed adjacent to one end of the rod and extending in front of the shutters when in their closed positions, said arms being adapted to be impinged upon by the body of a printingframe in the insertion of the latter into the frame carrying the shutters, and the shutters forced to an open position, the said shutters automatically closing upon removal of the printing-frame, substantially as set forth.

5. In combination with a photographprinting frame, a suitable shutter adapted to be interposed between the frame and the source of light, and means for forcing the shutter to an open position with the positioning of the frame for printing purposes, substantially as set forth.

In testimony whereof I aflix my signature in presence of two witnesses.

JOHN KAU T.

I/Vitnesses:

EMIL STAREK, Jos. A. MICHEL.

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