US479186A

US479186A - Photographic-plate holder

Info

Publication number: US479186A
Authority: US
Publication date: 1892-07-19
Anticipated expiration: 1909-07-19

Description

(No Model.)

J. H. HARE. PHOTOGBAPHIO PLATE HOLDER.

No. 479,186. Patented July 19, 1892.

ATTORN EY UNITED STATES PATENT OFFICE.

JAMES H. HARE, OF BROOKLYN, NEW YORK.

PHOTOGRAPHlC-PLATE HOLDER.

SPECIFICATION forming part of Letters Patent No. 479,186, dated July 19, 1892. Application filed April28,1892. Serial No. 430,990. (No model.)

To aZZ whom it may concern.-

Be it known that I, JAMES H. HARE, a citizen of Great Britain, and a resident of Brooklyn, in the county of Kings 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 an improvementin plate-holders for photographic apparatus.

It frequently happens in the taking of pictures, especially when double plate-holders are used, that the operator forgets which of the two slides have been already drawn in taking a previous picture, and sometimes even Whether a single slide has been drawn. Consequently pictures are frequently superposed upon each-0th er, and sometimes unused plates are destroyed by being treated as though they were negatives, whereas, in fact, they have never been exposed.

My device is intended to obviate all of the foregoing objections.

Figure 1 illustrates an elevation of a double plate-holder, the slide nearest the observer being partly drawn and partly broken away. Fig. 2 illustrates a front elevation of that which is shown in Fig. 1. Fig. 3 illustrates an enlarged view, partly in section, of the tell-tale.

A is the plateholder.

B B are the two slides.

O is the tell-tale. It is composed of a tube a, within which is a spindle Z), having a large head 0, which overlaps the sides of the tube, so that it can be readily manipulated by the fingers of the operator.

d is a spring, which is preferably inclcsed within the tube a, and it normallyprcsses the spindle Z) into the tube.

fis a hole in the side of the tube, through which a letter X (see Fig. 3) or equivalent designation made on the lower enlarged end of the spindle b may be seen when the said designation coincides in position with the hole or opening.

g is a finger or pin attached to the spindle, and it projects laterally through a slot h in the side of the tube a.

o is a ledge or equivalent device, which is attached to the frontbar j of the slide in such position that it will pass beneath and act as a support for the finger 9 when the pin is elevated by the pulling outwardly of the spindle.

If the plate-holder is a double one, I preferably apply two of my tell-tales-one for each slide.

The operation is as follows: When the slides are being pushed in, the spindleb may be lifted by being pulled outwardly by grasping thehead c with the fingers, and it is held out until the ledge 7; on the slide passes beneath the pin g, and the arrangementis such that when the slide is fully in the ledge will lie directly under the pin and prevent the inward movement of the spindle, and of course when the plates are in this position the indication X 011 the enlarged end of the spindle is removed from the openingfin the tube a, and cannot be seen. The moment, however, that the slide is pulled outwardly, as for making an exposure, the ledge i moves out from under the pin g and the spring (Z instantly moves the spindle inwardly and exposes the indication X at the openingf. In this way no error can occur, because after the holder is once properly charged any subsequent drawing of the slides will be at once recorded and made apparent at the opening f. The slide may be replaced or reinserted after the exposure without lifting the spindle. If so, the ledge will pass above the pin g and neither will have any effect upon the other.

I claim 1. In a plate-holder, the combination of an indicator, a spring which actuates the indicator, a slide provided with a ledge, and a device upon the indicator adapted to engage with the ledge upon the slide, substantially as set forth.

2. The combination, in a plate-holder, of a tube fastened to the plate-holder, a spindle within the tube, an indicator on the spindle, a spring adapted to move the spindle, a pin for the spindle, a slide, and a ledge on the slide, substantially as set forth.

Signed at New York, in the county of New York and State of New York, this 26th day of April, A. D. 1892.

JAMES H. HARE.

lVitnesses:

PHILLIPS ABBOTT, J. E. HOFFMAN.