US659143A - Magazine-camera. - Google Patents

Description

No. 659,143. Patented Got. 2, |900. G. DE GEOFROY. MAGAZINE CAMERA.

(Application led Har. 13, 1900.)

2 Sheets-Sheet l.

(No Model.)

we Norms vens no. pnumumo., wAsmNorom u c Patented Oct. 2, |900.

G. DE GEOFROY.

MAGAZINE CAMERA.

(Application filed Mar. 18, 1900.)

2 Sheets-Sheet 2` (No Model.)

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UNITED STATES PATENT OFFICE.

GEORGE DE GEOFROY, OF PARTS, FRANCE,

MAGAZINE-CAMERA,

1 SPECIFICATION forming part of Letters Patent No. 659,143, dated October 2, 1900- Application filed March 13, 1900. Serial No. 8,541. (No model To all whom t may concern.-

Be it known that l, GEORGE DE GEOFROY, a citizen of the Republic of France, residing at No. l Rue Matignon, Paris, France, have invented a new and uset'ul Improvement in Photographic Apparatus, of which the following is a specification, reference being had to the accompanying` drawings and to the numerals and letters of reference marked thereon.

My invention relates to a magazine arrangement for photographic apparatus, and has for it-s object to simplifyand render more eflicient the adjustment, exposure, and disposition of the sensitive plates, as hereinafter specied.

In the accompanying drawings, Figure l shows, chieiiy in horizontal section, a photographic apparatus provided with my invention, the section being taken on the line l l of Fig. 2. Fig. 2 is a transverse section on the line 2 2 of Fig. l. Fig. is a vertical longitudinal section on the central line of Fig. l,

the section being on the line 3 3 of Fig. l. Figs. Lt and 5 are details in perspective.

Similar numerals and letters of reference indicate similar parts in the several figures. The magazine consists of adrawer l, (shown in perspective in Fig. 4,) in which are placed in the ordinary way metal holders 2, adapted to hold the sensitive plates. The drawer 1 is adapted to be movedto either end of the box 3, which may be said to consist of two compartments X and Y, respectively, the latter being that constituting or containing the dark chamber. lf removable, it is provided with a screen or shutter. The box 3 is of such dimensions that besides the necessaryspace at X in the optical axis of the objective for lodging the plate to be exposed there is sufficient space at Y to also receive the drawer l. In Order to move the drawer l into either compartment X or Y, one or more rods 4 are provided fixed to the drawer and united with the cross-bar 5, having a ring o'. The side 7 of the drawer, which forms one of the walls of the dark chamber proper, is of a height equal to the total thickness of all the metal holders 2 less at each end the portion necessary to allow ot' the passage of the top and bottom plates. Upon the rear S of the box 3 are ixed in the compartment Y one or more iiat springs 9, which press the pile of plates against the opposite or front wall l0. These springs are disposed according to the line of displacement ot' the drawer, so as not to prevent its movement.

At the forward part of the compartment X, at each side thereof, is secured a hook l1, which hooks when the drawer is moved into the compartment X ride over the top plateholder and drop behind the edge ot' said holder when the drawer has reached its extreme limit in the said compartment.

Fixed in the rear wall ot' the compartment X are horseshoe-magnets l2 l2, their poles being tiush with the inner surface of said wall. This form of magnet in this relation insures a high degree of efficiency by reason of the juxtaposition of the poles.

The several plate-holders 2 having each been charged with a sensitive plate and supposing itis desired to adjust one of the plates for exposure, the box 3 is turned so that the lens 3 stands in vertical position, and the drawer l is then pulled from the compartment Y to that X, and it will be seen that the spring-hooks ll, the tlexure and inclined construction of which allow them to be moved upward by contact with the upper holder 2, will catch over t-he edges 2a of the plate-holder, as above stated. The drawer having been pulled into t-he compartment X and im medi ately pushed back, the holder, with the plate to be exposed, will fall to the bottom ot' the box 3, be there attracted by the magnets l2, and held lirmly in position for exposure. Inclined blocks 13 are provided, as shown pan 'ticularly in Fig. l, and it will be observed that as the holder drops it will come in contact with the inclined faces of the blocks 13 and be automatically pushed toward the opposite end ot" the magazine or box. This provision is necessary because of the thickness of the side 7 of the drawer and results in the proper fastening ot' the plate for exposure.

In the position of the parts shown in Fig.

`l the top plate has fallen to the bottom ot' the box and is held there by the magnets, the next succeeding plate occupying the top position of the pile and being ready to be placed iu position for the next exposure. The tirst plate having fallen to the bottom of the apparatus and being kept in position bythe ICO action of the magnets upon the metal plateholder and the drawer being pulled inl-o the compartment X, the spring-catches 14, provided iu the side 7 of the drawer, ride over the edges of the holder 2 and engage the edge 2 of the holder held by the magnets, and as the drawer is pushed back the said holder and the plate carried with it ride over the springs 9, the plate becoming the lowest one of the pile, as will be readily understood.

A part of the surface of each of the metal plate-holders is buckled, as shown at 15 in Fig. 5, to assist in holding the plate from movement within the holder, and also to keep the plaie 'from slipping an edge of the holder is slightly turned up, as at 1G. (Seen in the same ligure.)

In the magazines heretofore in ilse it was in effect the top plate which was exposed. rIhen when the drawer was pushed back the exposed plate fell tothe bottom of the apparatus, lodging itself under the pile of other plates and becoming the bottom plate when the drawer was put back into the first position for the purpose of presenting another plate for exposure.

According to my invention the upper piate when fallen to the bottom of the apparatus and kept in position by the magnets is the one exposed, and when the drawer is moved into the opposite position the plate just exposed is caught by the catches 1-1 and brought to its proper place as the lowermost plate of the pile. The next plate to be exposed-that is to say, the then upper one of the pile-takes the exposed position or falls to the bottom of the apparatus at the time the drawer for the purpose of returning the already-exposed plate 'to the dark chamber has been brought to the end of its backward motion. When the magazine is moved over the exposed plate and the drawer with it, the holderof the justexposed plate slides from the poles of the magnets, and it is well known that under these conditions there is no appreciable resistance and that the power of the magnets is not impaired. As shown in Fig. 1, the front 10 of the compartment Y is adapted to slide as a lid to permit of the charging of the magazine and is secured by a suitable catch 10a.

1t will he seen that my invention diminishes the thickness of the apparatus to that of merely the pile of the plate-holders, which permits of reduction in the length of the bellows or in the size of the apparatus if it contains a capacity of fixed dimensions in place of the bellows.

The general arrangementl of the parts of the apparatus not entering into my invention is not essential, my improvement relating more specifically to the constructions and combinations entering into the magazine. 'lhe bulk of t-heapparatus maybe still further decreased by making the magazine telescopic or otherwise collapsible in its character, so that the compartment X may be fitted into or over the compartment Y, or vice versa, while the apparatus is not in use.

It will be seen from the foregoing that my invention provides a drawermagazine for photographic apparatus, having the plateholders made of metal arranged so as to expose not the front or iop plate brought into the focus of the objective, but that plate when it has fallen to the bottom of the apparatus, the plate being kept in position by magnets acting on the metal holders, and, furthermore, that the magazine having been pushed back from its place in that compartment where the image is taken the focus is consequently not on a level with the plate farthest from the objective, but on a level with the opposite end plate.

My invention is capable of minor changes in construction and arrangement without departing from the spirit thereof. Such changes or departures from the construction herein described as may suggest themselves to the skilled mechanic without the exercise of invention I claim as within the scope of my improvement.

Having thus described my invention, l claim- In a photographic apparatus, the combination of a box having a dark chamber end or com part mentY and an opposite com pari ment X having hooks 11, a drawer for carrying a pile of spring-held plate-holders and sensitive plates, said drawer being adapted to be moved from one compartment to the other, springcatchcs 14 mounted in said drawer, inclined blocks 13 in the compari ment X, and magnets 12 in the same compartment 5 the construction and operation being such that, as the drawer is pulled from the dark chamber, the hooks 11 will catch over the top plate-holder and draw it into the compartment X, when it with its plate will fall to the bottom of the apparatus, be slid along by the inclined blocks 13, and attracted and held by the magnets 12 during exposure, to be afterward transferred by the return movement of the drawer, through the medium of the spring-catches 14, to the dark chamber Y and to the bottom of the pile, substantially as set forth.

In testimony whereof I hereunto set my hand and seal.

GEORGE DE GEO FROY.

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