US439808A

US439808A - anthony

Info

Publication number: US439808A
Authority: US
Publication date: 1890-11-04
Anticipated expiration: 1907-11-04

Description

(No Model.)

B. A. ANTHONY.

v PHOTOGRAPHIG PLATE HOLDER. No, 439,808

WITNESSES ATTORNEY UNITED STATES PATENT OFFICE.

RICHARD A. ANTHONY, OF NElV YORK, N. Y., ASSIGNOR TO THE E. & H. T. ANTHONY & COMPANY, OF SAME PLACE.

PHOTOGRAPHlC-PLATE HOLDER.

SPECIFICATION forming part of Letters Patent No. 439,808, dated November 4, 1890.

Application filed March 6, 1890. Serial No. 342,898. (No model.)

To all whom it may concern.-

Be itknown that I, RICHARD A. ANTHONY, a citizen of the United States, and a resident of New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Photographic- Plate Holders, of which the following is a specification.

My invention relates to improvements in plate-holders for photographic apparatus; and it consists in a new and effective construction of the slide-locking devices, whereby they are firmly held in the plate-holder until their re moval is desired.

In the drawings the same reference-letters indicate the same parts in all the figures.

Figure 1 is an elevation of the front of a double plate-holder having my slide-lock attached, the slide on the side presented to view being removed. Fig. 2 is an edge view of the parts shown in Fig. 1. Fig. 3 is an end view of the plate-holder, both of the slides bein g in their closed position and locked therein by the slide-lock. Fig. 4 is a view the same as Fig. 3,the slide-lock being unlocked for the removal of the lower slide.

It will be obvious that although I show my improvements as applied to a double plateholder, it may be equally well employed in single holders.

A is the frame of theplate-holder. It may be constructed in any preferred manner.

B B are the slides.

D is the usual diaphragm, (or the back of the holder if it be asingle plate-holder.) It is provided with the usual springE for pressing the plate forward. These parts are or may be made in any preferred form.

F is my improved lock for the slides, which I have found much more effective, simple, and convenient than anyheretofore known to me. The lock proper comprises a screw or equivalent pivot G, which is fastened in. the end of the frame of theholder. It passes through a hole made in the foot orbase H of the lock and the lock swivels on it. A spring I, abutting against the head of the pivot G at one end and pressing against the base II at the other end, puts the lock under spring-friction, so that it will remain in any position in which it is left. Any other suitable means may be employed for securing this result. The upper part of the lock is provided with a plate or bar J, terminating at each end in lateral projections K K, which are preferably provided with thumbpieces L L. whereby the lock can be easily swung or turned on its pivot. The construction and dimensions of the parts of the lock are such that it will ordinarily engage with the ends of both of the slides, and they can only be withdrawn when the lockis intentionally placed in the position shown in Fig. 4. \Vhen so placed, it is obvious that the lower slide can be withdrawn, and of course when swung into directly the reverse position the upper slide can be withdrawn.

Itwill be observed that I cutaway the projecting part M of the slides, which are grasped by the finger and thumb for their withdrawal from the holder at one side of each slide, and that the projecting parts which I leave are upon opposite sides of the slides. This I do so that the projection M on one slide may not interfere with the finger or thumb of the operator when desiring to withdraw the other slide from the holder and when manipulating the slide-lock.

I do not limit myself to the precise details of construction of the parts as shown and described, because it will be obvious to those who are familiar with this art that various modifications may be employed and still the essentials of my invention be present.

I claim 1. A plate-holderprovided with a slide-lock eccentrically pivoted to the plate-holder and adapted to have a rotary movement only relative to its pivot and to be successively engaged with and disengaged from the ends of the slides by simply turning on its pivot, the relation between the lock and the plate-holder being such that no part of the lock at any time projects beyond the sides of the plateholder, substantially as set forth.

2. A plate-holder provided with a frictionheld slide-lock eccentrically pivoted to the plate-holder and adapted to have rotary movement only relative to its pivot and to be suc- "cessively engaged with and disengaged from Yoi'k and State of New York, this 28th day of the ends of the slides by simply tu rning on its February, A. D. 1890. pivot the relation between the look and the '1 plate holder being such that no part of the I RICHARD ANIHONY' 5 look at any time projects beyond the sides of Witnesses:

the plate-holder, substantially as set forth. Y M. WILCOX,

Signed at New York, in the county of New F. A. ANTHONY.