US300438A - Dry-plate holder - Google Patents

Description

(No Model.)

B. L. BERGSTRESSER.

DRY PLATE HOLDER. v

Patented June 17, 1884.

IJV'VEW'TOR N. PETERS, Pmwumo n hur. Wdsllingtnn, D. c.

FFlGEt EDlV IN L. BERGSTRESSER, OF HUBLERSBURG, PENNSYLVANIA.

DRY-PLATE HOLDER.

SPECIFICATIQN forming part of Letters Patent No. 300,438, dated June 17, 1884.

Application filed March 28, 1884. (No model.)

To aZZ whom it may concern.-

Be itknown that I, EnwrN L. Bnnes'rnnssnn, a citizen of the United States, residing at Hublersburg, in the county of Centre and State of Pennsylvania, have invented a new and useful Dry-Plate Holder, of which the following is a specification, reference being had to the accompanying drawings.

My invention relates to a dry-plate holder or cabinet, and it has for its object to provide a device of this character for retaining plates which shall thoroughly prevent any access of light to the same while they are being removedfrom said cabinet for exposure in the camera, and, further, to provide improved means whereby it may be plainly visible the number of unexposed plates that are in the holder.

XVith these ends in View the invention consists in the improved construction and combinations of parts hereinafter fully described, and pointed out in the claims.

In the drawings, Figurel is a perspective view of myimproved cabinet or plate-holder, showing the devices for withdrawing a plate from the cabinet for exposure. Fig. is a rear elevation, the casing being'broken away. Fig. 3 is a longitudinal section, and Fig. 4 is a transverse section.

In the accompanying drawings, in which like letters refer to corresponding parts in the several figures, A is an outer box or casing, which is preferably of the form shown. Upon the bottom or floor of this casing are secured strips a for the plate-holders to slide upon. Upon the outer side of the rear end of the box or casing A is provided a disk having numbers marked corresponding to the number of plates the casing A is adapted to contain, or, if preferable, these numbers may be marked directly 011 the casing itself.

0 represents a hand or indicator adapted to travel around said disk or figures, making one movement as each plate is inserted in the easing A, as will be more fully described. This hand or indicator 0 is rigidly mounted on a shaft, E, having bearing in the rear end of the casing, and provided 011 its inner side with a ratchet-wheel, G. Upon the inner side of the end of the casing A, adjacent to the ratchetwheel, is provided a pivoted pawl, H, adapted to bear against the upper side of said ratchetwheel, said pawl being held in position thereon by means of a spring, I, secured upon the inner side of the said end.

J represents a lever, which is pivoted between two of the strips a, and is provided at its forward end with an upwardly-projecting arm adapted to bear against and operate the ratchet-wheel from the under side thereof, and

held in position by means of a spring, which is recessed or cut away at its end to form arms, which inclose the end of said arm and prevent any lateral movement of the same.

K represents a partition-strip,which in closes said mechanism, and which is provided with a bracket, 2), for the reception of the end of the ratchet-shaft. The forward end of the actuating-lever is provided with an upwardly-proj ecting extension, 0. The lever is also provided at its forward end and upon the underside thereof with a coil-spring,which bears against the lioor of the casing at its other end, and serves to return the lever to its proper position after it has been depressed by the insertion of a plate. Upon the cover of the casing are provided slots (1 d, having grooves in their sides for the passage of slides 0, having 011 their under side depending lugs to limit the forward movement further than to open the said slot. l

K represents strips inclosing said slots, the same being recessed or cutaway at their ends, as will be described.

L represents a pusher, which is provided 011 its lower end with a slot to fit over the upwardly-projecting extension of the lever, and

provided with a rod detaehably secured to its rear side, the other end of said rod projecting through the casing, and provided with a handle or knob for operating the same. Upon one of the inner sides, adjacent to the pusher, is provided a flat spring, I), which, when a plate is inserted in the cabinet, holds the same in an upright position until it can be moved forward by the'pusher, thus preventing all liability of the plate dropping, which would otherwise be the case, and. to place the plate in an upright position, as would be necessary before it could be pushed forward, would necessitate the removal or lifting of the cover, and consequently the damaging exposure of the plates.

In using the above-described cabinet I employ a casing, as shown, the same being provided with a slide or shutter upon its side and with a slide upon its lower edge. In the upper edge of this shutter is provided a screwthreadedbracket, having communication with the inner side of the said shutter.

X represents a rod, provided at its upper end with a knob or handle and at its lower end with a screw thread. This shutter is adapted to be placed directly over the rear slot, d, of the cover, fitting between the strips inclosing the same, its lower slide fitting in the recessed portion in the end of the same. The holders containing the dry plates are p revidedwith screw-threzuled brackets upon their upper sides, and are situated one, or the rear one, directly under said screw -threaded rod. To withdraw a plate the slides are withdrawn and the rod screwed into the bracket of the plate-holder, and the same then raised into the shutter. The slide of the shutter is then closed and the shutter removed. After the plate has been exposed and it is desired to return the same to the cabinet or easing, the shutter containing the plate is placed over the slot d, the slides withdrawn, and the plate inserted in the casing by means of the rod, the plate-holder depressing the end of the lever and registering l on the dial, thus showing that one exposed plate is in the box. The plateholders are then moved forward by means of the pusher.

It will be seen from the above description that by the use of my improvement a plate may be readily withdrawn from the casing for exposure, and placed therein for developing at some future time, without any possibility of exposure to the light.

It will also be seen that by the use of the devices described it is readily apparent at all times the number of plates that have been exposed, and deducting the number of plates that have been exposed from the number the box contains or is adapted to contain (as the box is usually tilled) shows exactly how many plates there are yet left for exposure, thus preventing any confusion or exposure of plates that had already been operated upon.

IlIavi ng fully described my inventiomwhat I claim as new, and desire to secure by Letters Iatent, is-

11.. A. cabinet for containing plates, provided with n'ieehanism which aulolnatilail ly registers each plate upon a dial as it placed therein alter exposure, substantially as set forth.

2. In a cabinet for holding plates, the com bination, with mechanism :l'or automatically registering each plate as it is inserted, ot' a pusher for moving the plates forward, substantially as set forth.

3. In a cabinet for holding plates, the combination, with a suitable dial having ligures marked thereon, of a shalt carrying a ratchetwheel, and. an indicator, and a lever provided with means for operating said ratchet-wheel, as set forth.

In a cabinet for holding plates, the combination, with a suitable dial having :ligures marked thereon, of a shaft carrying an indicator, and ratchet wheel, a spring pressed pawl engaging said ratchet-wheel, and a lever provided at its forward end with an arm to engage said ratchet-wheel, substantially as set forth.

5. In a cabinet for holding plates, the combination, with a dial having figures marked thereon, of a shaft carrying a ratchet-whccl and indicator, and having bearing at its rear end in a bracket secured td' a strip inelosing said ratchet-wheel, a spring-pressed pawl adapted to engage. said ratchetwheel, and a lever provided with an arm for actuating the same, substantially as set forth.

6. In a cabinet for holding plates, the combinatiol'i, with a dial having figures marked thereon, of a shaft carrying a ratchet-wheel and indicator, a spring-pressed pawl adapted to engage said ratchet-wheel, alever provided with. an arm at its forward end for actuating said ratchet-wheel, a spring for retz'iining the same in position, said. lever being provided at its forward end with an upwardly-pro]ecting extension, and a coil-spring, located between the end ol said lever and the door, substantially as set forth.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in presence of two witnesses.

ll. L. jl'llGI-ZGS'IJtESfilllt.

lVitnesses:

1:1. .llil'nrrziu, i. S. Kampala.

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