US2221265A

US2221265A - Film holding device

Info

Publication number: US2221265A
Application number: US261078A
Authority: US
Inventors: Rinard Ellis Budington; William S Weeks
Original assignee: Individual
Current assignee: Individual
Priority date: 1939-03-10
Filing date: 1939-03-10
Publication date: 1940-11-12
Anticipated expiration: 1957-11-12

Description

NOV. l2, 1940. E B RlNARD ET AL 2,221,265

FILM HOLDING DEVICE Filed March 10, 1959 .AT TU PMN EYE;

Patented Nov. 12, 1940 UNITED STATES PATENT OFFICE FILM HOLDING DEVICE Application March 10,

2 Claims,

to use, and one which may be manufactured at a minimum cost.

A further object is to produce a device of this character which will not injure the lm during the processing thereof.

Other objects and advantages will be apparent during the course of the following description.

In the accompanying drawing forming a part of this specification and in which like numerals are employed to designate like parts throughout the same,

Fig. 1 is a side elevation of our device having a portion thereof broken away;

Fig. 2 is a front elevation of Fig. 1;

Fig. 3 is a cross sectional view taken on the line 3 3 of Fig. 1; and

Fig. 4 is a fragmentary View, showing the winding stud and its ratchet in detail.

In the processing of a photographic film, the film must rst be subjected to a developing agent and later to a fixing agent. As these agents are both chemicals, it is apparent that all surfaces of the lm to be processed must be reached by these chemicals. As the lm is of considerable length, it is apparent that the handling of the film is a delicate operation; and if the iilm is not carefully handled, the sensitive emulsion thereon will be injured.

We have, therefore, devised means for holding the film in spaced convolutions and rigidly attaching the lm to a disc so that the same will stand upon edge, so to speak.

In the accompanying drawing wherein for the purpose of illustration is shown a preferred embodiment of our invention, the numeral 5 designates a base plate having standards I5 and 'I which serve to support a spindle 8 and a crank arm 9. This spindle has threadedly secured thereto, as at II, a threaded winding stud I2, upon which is freely rotatably mounted a disc I3 having a spring-pressed dog I4, the spring being shown at I6, which engages the teeth of a ratchet Il, which is pinned or otherwise secured to the winding stud I2. The winding stud I2 has a head I8 to which one end of a coiled spring I9 is secured. The opposite end of this spring 1939, Serial N0. 261,078

is secured at 2l to the disc I3 at a point near its outer periphery. The head I8 has a projection or pin 22 which serves to secure the end of the lm thereto.

In using our device, and assuming that the parts are in the position of Fig. 2, the operator secures one end of the film to the pin 22, using one of the perforations usually found adjacent the edge of the film. It is understood that the film magazine is held in one hand during this winding operation. Now by turning the crank 9 slowly in a counterclockwise direction (see Fig. 2) and guiding the film into place on the spring I9, the result will be that by now holding the disc stationary and while continuing to turn the crank, the spring I El will be coiled upon itself, thus holding the convolutions of lm between its convolutions; and the ratchet I'l will prevent uncoiling of the spring so that the lm cannot escape.

In order to remove the lrn and disc from the standard, the disc is still held and the direction of rotation of the crank 9 is reversed. This will unscrew the spindle 8 from its threaded connection II with the winding stud, thus permitting the disc and its assembled parts together with the film thereon to be removed, after which the same may be immersed in the developing agents.

Upon the completion of the processing of the film, the disc and its assembly are replaced in the position of Fig. 1. Then by holding the disc stationary and by releasing the ratchet II, the spring may be allowed to unwind slowly, thus releasing the lm positioned thereon.

It will be apparent from the above description that our device. will accomplish all the objects set forth.

It is to be understood that the form of our invention herewith shown and described is to be taken as a preferred example of the same and that various changes relative to the material, size, shape and arrangement of parts may be resorted to without departing from the spirit of the invention or the scope of the subjoined claims.

Having thus described our invention, We claim:

1. In a device of the character described, a disc having a stud centrally positioned therein and rotatable relative thereto, said stud having a head extending beyond the face of said disc, a spring mounted on said disc and having one end connected to said head and having its opposite end secured to said disc at a point near1 its periphery, means for rotating said stud in one direction so as to coil said spring upon itself, means carried by said disc to prevent retrograde movement of said stud when said spring tends to uncoil, means for securing a film to said head, and means for supporting said stud during the placing of a film between the convolutions of said spring.

2. A device for processing lms, comprising a support, a spring having one end secured to said support, a rotary member mounted in the support and rotatable with respect thereto and secured to the opposite end of the spring, means for securing the end of a film to said rotary member, and means for rotating the rotary member while the support is held stationary, whereby the fllm may be wound between the convolutions of the spring and the rotation of the rotary member will wind the spring and clamp the film between the convolutions thereof.

ELLIS BUDINGTON RINARD. WILLIAM S. WEEKS.