US1029266A - Winding-key for photographic cameras. - Google Patents

Description

G. BORNMANN.

WINDING KEY POE PHOTOGRAPHIO CAMERAS? APPLICATION FILED NOV. 14, 1911.

1,029,266, Patented June 11,1912.

22% (M 13W gwmz ,1; 2!, MM M COLUMBIA PLANOURAPH CO.,WASHINOTON, D. c.

UNITED STATES PATENT onnicn.

CARL BORNIVIANN, OF BINGHAM'ION, NEW YORK, ASSIGNOR 'IO ANSGO COMPANY, OF BINGHAMTON, NEW YORK.

WINDING-KEY FOR PHOTOGRAPHIC CAMERAS.

Specification of Letters Patent.

Patented June 11, 1912.

Application filed November 14, 1911. Serial No. 660,297.

To all whom it may concern:

Be it known that I, CARL BORNMANN, a citizen of the United States, and a resident of the city of Binghamton, county of Broome, State of New York, have invented a new and useful Improvement in \Vinding- Keys for Photographic Cameras, of which the following is a full, clear, and exact specification.

This invention is an. improvement upon the winding key for cameras patented 'to me in United States Letters Patent No. 970,603 dated September 20, 1910, to which reference is made. In the invention of that patent provision was made whereby the winding spool in a film camera could be freely turned in one direction but rotation in the opposite direction would be instantly prevented and the construction has proven of great utility.

The present invention is to carry that previous one still farther and to afford means whereby in a relatively inexpensive, reliable and easily operated manner, the winding key may be retracted from the inward or projected position in which it engages with the spool, so'that the spool may be readily removed and a new one inserted, and the construction is such that the key when retracted, by easy and simple manipulation may be made to permanently retain its retracted position without the necessity for holding on to it, thus both hands of the operator will be free for manipulating the spool.

The parts involved in the invention are few in number, simple and permanent in construction and do not materially increase the cost of the device.

Referring to the drawings, Figure 1 illustrates an elevation of the invention as applied to an ordinary folding pocket camera; Fig. 2 illustrates a vertical sectional view taken from the front to the rear of the apparatus, the winding key being in its projected position; Fig. 3 illustrates a view the same as Fig. 2, excepting that the winding key is in its retracted position; Fig. 4 illustrates an elevation of that which is shown in Fig. 3; Fig. 5 illustrates a plan View of the interior of the casing, showing the look ing devices and some of the co-acting parts in section, the cover plate being removed.

In the drawings, 1 represents the camera, 2 the cover plate for the winding key, 3

a l10rn-like extension from the cover plate, which projects beyond the edge of the camera and serves as a means whereby the usual strap or other handle 4 may be connected by means of a ring 5 or otherwise as preferred.

6 is a casing made of met-a1 which is fastened to the cover plate in any suitable manner, as for instance, by screws. The casing contains a slightly dished spring 8, upon which rests a circular movable block 9, a section of which is broken away and within the space thus made the locking bar 1.0 is located.

11 is a cam shaped part formed on the exterior of a short shaft-like part 12 which revolves in bearings 13 (see Fig. 3) furnished by the edges of a hole in the cover plate 2 and in a similar bearing 14 furnished by the edges of a hole made in the rear plate of the casing 6. This shaft is re cessed at its inner end as at 15 and within this recess is a spring 16 which bears at one end against a shoulder 17 formed at the inner end of the recess 15 in the shaft 12 and at the other end it abuts against a washer 18 which is held to the key spindle 19 by a plate 20 set edgewise in the end of the spindle l9 and which is held by a cross pin 21 or in any other suitable manner. This plate 20 is adapted to enter the saw kerf or other recess made for its reception in the end of the cartridge spool. At the other end of the spindle 19 there is another cross plate 22 similarly connected with the spindle and held by a cross pin 23, or in any other suitable manner.

24 is the winding thumb piece which is preferably pivoted to the cross plate 22 by pivots or pins 25, so that it can be readily folded down within the cup-shaped cover plate 2, as usual.

The operation is as follows: The direction of rotation of the winding key during the winding operation is indicated by the arrow in Figs. 1 and 5 and when the winding key is turned in this direction a shoulder 26 on the cam shaped part 11 pressing against the movable block 9 (see Fig. 5) causes that block and also the locking bar 10 which is pushed around by the block to revolve with the spindle. The moment, however, the atiio immediately takes a bearing upon the locking bar 10 and, inasmuch as all the parts are made to fit somewhat snugly the ends of this bar, which restagainst the inner surface of the recess in the casing 6 in which it is located, will not yield to the pressure of the cam shaped surface, consequently thewinding key will be instantly locked against movement in that direction although it may again be freely moved or turned in the opposite direction.

WVhen it is desired to remove a cartridge spool from the camera or insert one therein, itis necessary to withdraw the plate 20 from the recess in the end of the spool spindle. In order to efiect this the operator, gripping the thumb piece 24 between finger and thumb, will pull it outwardly, thus causing the parts to assume the position shown in Fig. 3, in which the spring 16 is collapsed and the spindle 19 and the cross plate 20 retracted so that their inner ends do not project beyond the plane of the hollow shaft 12 and I prefer toso connect this mechanism with the camera as indicated at Fig. 3, that the inner end of the shaft 12 when retracted shall not project beyond the plane of the side ofthe camera. To hold the spindle and connected parts in their retracted position the thumb piece is given a quarter turn, so that the cross plate 22 shall rest crosswise on the outer end of the shaft 12, as shown in Figs. 3 and 4. The device may be held to the camera in any suitable way. I prefer to em-ploy screws 27 as shown in Figs. 1, 3 and good smooth movement of the parts.

The special embodiment of the invention which I have described and illustrated is one form only in which it may be constructed. Various changes may be made therein without departing from the essentials of the invention.

I claim:

A winding key for cameras comprising a I and which engages with the spring, a device on the inner end of the spindle adapted to engage with and turn a cartridge spool and a device on its outer end adapted to engage with and turn the shaft.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

CARL BORNMANN.

Witnesses GEO. W. TOPLIFF, A. DEICHELMANN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents Washington, D. C.

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