US970603A - Winding-key for cameras. - Google Patents

Description

G. BORN MANN ,WINDING KEY FOB CAMERAS. APPLIOATIOB FILED our. 5, 1909.

970,603. Patented Sept. 20, 1910.

CARL BORNMANN,

OF NEW HAVEN, CONNECTICUT, .ASSIGNOR TO ANSCO COMPANY,

OF BING-HAMTON, NEW YORK, A CORPORATION OF NEW YORK.

WINDING-KEY FOR. CAMERAS.

Specification of Letters Patent.

Patented Sept. 20, 1910.

Application filed October 5, 1909. Serial No. 521,139.

To all whom :it may concern;

Be it known that 1, Cam. BORNMANN, a citizen of the United States, and a resident of the city and county of New Haven, State of Connecticut, have invented a certain new and useful Improvement in Winding-Keys for Cameras, of which the followin is a full, clear, and exact specification, recrence being had to the accompanying drawings, in Wl11Cl1- Figure 1 illustrates a sectional view of a.

' "portion of a box camera, showing also one a plan view,

form of the invention, engaged with a cartridge spool; Fig. 2 illustrates a plan view of ashallow-cu -like device which is preferably employe as a means to center and support the end of the spool with which the key engages; Fig. 3 illustrates an elevation, partly in section, of the detail of the windlng key shown in Fig. 1; Fig. 4 illustrates taken on the line 4- 1 of Fig. 3 and looking in the direction of the arrow; Fig. 5 illustrates an elevation, partly in sec tion, of a modified. construction of the invention; Fig. 6 illustrates a view of that which is shown in Fig. 5 taken on the line 66 thereof and looking in the direction of the arrows; Fig. 7 illustrates an elevation,

' partly in section, of still another modified ings,

construction of the invention; and Fig. 8

illustrates a view taken on the line 8-S of Fig. 7 and looking in the direction of the arrow.

It is the object of this invention to provide a winding key for the spools of photographic cartridges, which shall afi'ord aiirm and reliable hold upon the spool and permit the same to be turned in one direction in a smooth, noiseless and cllicicnt manner, yet absolutely prevent movement in the reverse direction at any and all points of revolution.

Referring now to Figs. 1 to 4 of the draw- 1 represents the exterior box of an ordinary box camera, 2 the removable interior frame which supports the partitions, cartridge spools, etc., 3 one of the spools journaled at one end by a spring supported stud or pin 4 as usual, and at the other end b a shallow cup-shaped plate 5 (see Fig. 2 which has a flange 6, the interior of I which coincides in size with the exterior of theflange 8 on the spool. I prefer to break away a portion of the flange, as shown at 9, so that the film and paper backing may smoothly unwind from the spool without scraping against the flange if the end disk of the spool, when in the cup, should be below the level ofthe f ange.

The winding key shown in Fig. 1 is illustrated in Figs. 8. and 4 and is as follows: 10 is theusual cross-bar, whereby the key is turned, 11 is the shaft of the key, 12 is a thin stiff piece of. metalsct in the end of the spindle 11, which engages with a, suitable groove or notch made irn the end of the spindle of the spool. .13 is aspring which normally projects the spindle.11,so as to maintain proper engagement between its cross piece 12 and the spool. 14: is a back plate for the key locking mechanism and 15 is a flanged box-like casing for it. They are both held rigidly together and to the camera box by screws 16.

The devices within the casing 15 are as follows, (see particularly Fig. 4). 17 is a flat block of metal which is bored centrally to permit the spindle 11 to pass through it and it has such diameter as to turn readily, but with a good smooth movement within the casing 15. It is, as shown in Fig. 4, substantially two-thirds of a circle in area. One

of the edges of the removed third, shown at; 18, 1S provided adjacent to the spindle 11" with an inwardly projecting point or portion 19, against which the edge 23 of a flattened surface 20 on the spindle engages when the spindle is rotated for winding. 21 is a flat curved bar, somewhat resembling a plate spring, set edgewise in the casing 13, and it has such dimension that its ends rest lightly against the interior wall of the casing and it preferably bows inwardly, as shown in Fig. 1, so that the point 22 of the spindle '11 rests lightly against it, or at least is close adjacent to it.

The operation of the device as thus far explained is as follows: The direction of retation of the winding key during the winding operation is indicated by the arrow in Fig. 4, and when the spindle 11 is turned in this direction, clearly the part 23 thereof, which engages with the projecting point or portion 19 of the block 17, will cause that block to move around also in the direction of the arrow, and since the outer edge of the block rests against the adjacent end of the bar 21, that. bar also will be shoved around within the casing as the spindle and the block 17 move. The moment, however, the attempt is made to turn the key in' the remain stationary.

verse direction. then there is no pressure exerted by the point 23 upon the block 17, and consequently that block and the bar 21 re- Meantime, however, the point or part 22 of the spindle 11 is brought into contact with the bar 21, at or nearits medial part, exerting a substantially tangen tial pressure upon it, and since its two ends are supported against the inside of the easing, it will prevent rotation of the spindle 11 in the reverse direction referred to, and consequently the key will be locked against movement in this direction, although it may again be freely moved or turned in the opposite direction.

In Figs. 5 and 6 I show a construction which is the same in principle and mechanical operation, but d ffers in detail of con struction, from that heretofore described, whereby it is adapted to use under conditions and in forms of camera different from that in which that shown in Figs. 1 to 4 may be employed. In Figs. 5 and 6, the

spindle of the winding key is shown at 24. It is provided with a folding thumb piece 25, as well understood. The back plate of the casing is shown at 26, the casing proper, at 27, the movable block within the casing at 28, and the curved bar at 29. The differences between this construction and that shown in Figs. 1 to 4 are principally as follows: In this form I employ a dished, or disk, spring 303 between the back plate 26, the block 28 and the bar 29, in order that these parts may be held firmly in position and be under some pressure, so that they will not move automatically, but only when under the pressure of the winding keyf In this construction also, instead of having the flattened surface 20 with the two contact points 22 and23, as shown in Fig. 4, I employ a pin (see Fig. 6) which is set in the spindle 24, one end of which 32 projects beyond the periphery of the spindle, and it is set in a three cornered space between one end of the block 28 and the bar 29, so that when the key is turned in the direction of the arrow, this projecting end 32 of the pin will engage with the adjacent end of the block 28, and will push it around in the same direction as the pin is turned and consequently the bar 29, whichis in engagement with the block 28 will likewise move around the casing in the same direction. As soon, however, as the'attempt is made to turn the key in the reverse direction,then the projecting end of the pin will come in contact with the bar 29 between its ends, which will preclude further turning of the spindle in a reverse direction.

In Figs. 7 and 8 I show still another form of the invention, it being substantially the same in all respects that shown in Figs. 5 and ('3. This form differs from that however because, as shown best in Fig. 8, there are two blocks adapted to rotation in one direction although not in the other, numbered 32 and 33 respectively, the two bars 34 and 35, and the pin 36 which passes through the spindle 37 is in this case made double-ended; that is to say, both its ends project beyond the periphery of the spindle.

The operation is the same as above described: iVhen the spindle 37 is turned in the direction of the arrow, the projecting ends of the pin 36 engaging with the appropriate surfaces of the blocks 32 and. 33 cause them to travel around in the same direction, and these blocks engaging with the bars 34 and 35 nearwhat may be called the rear end thereof, cause them severally to travel around the interior of the casing in the same direction. When, however, the attempt is made to turn the spindle in the reverse direction, then the projecting ends of the in no longer exert pressure upon the bloc s 32 and 33, so that they and the bars 34 and 35 remain stationary, and meantime the ends of the pin come in contact with these bars between their ends, which are supported against the interior of the casing, whereby the same as in the other instances, the key becomes locked against movement in the reverse direction.

In the above description I have referred to the device which acts as the holding dog, preventing reverse movement of the spindle, as a flat curved bar, somewhat resembling a plate spring. As a matter of fact, it is animportant whatthe exact shape of this part may be, and it is not essential that it shall have any spring action or resiliency, but if it is adapted to yield slightly to pressure brought upon it by the winding key, when it is moved in the reverse direction, it will be advantageous rather than otherwise, because the movement permitted will be so slight that there will be no interference with the proper operation of the device, and

it may at times relievethe mechanism'bf strains which would otherwise tend tokfracto re some part.

It will be obvious to those who are familiar with such matters that the forms of the invention illustrated by me are by no means the only ones in which it may be embodied; on the contrary, the details illustrated may be varied very extensively and still the essentials of the invention be recurate relations between the spool and the by the block, a'key spin 4 1-0 winding key, so that the operation of the several devices is improved.

I claim: I 1. A winding key for cameras comprising a casing, a disconnected-and movable block which partly fills the interior of the casing, a bar in the casing in the art not occup ed tile the inner e d of which is provided with a surface adapted to engage with and rotate a cartridge spool 'andwhich is also provided withsurfaces whereby, during its rotation inone direction, the block and the bar will be pushed around within the casing, but when turned in the reverse direction, will lock the spindle by contact with said bar. 2. A winding key for cameras comprising a casing, a disconnected and movable block which partly fills the interior of the casing, a barin'the casing in the part not occupiedby the block, the ends of which bar are adJacent to the walls of theeasing and also adjacent to the ends of the block, a key spindle the inner end of which is provided with a surfaceadapted to engage with and rotate a cartridge spool and which is direction, will-lock the spindle by contact with said bar.

3. A winding key for cameras comprising a casing, a key spindle which passes t trough the casing the inner end of. which it; provided with a surface adapted to engage with and rotate a cartridge spool, disconnected and movable locking devices within the casing and surfaces upon the spindle which cause said locking devices to move around the interior of the casing when the spindle is turned in one direction, but which means engage with said locking devices and lock the spindle when the latter is turned in the reverse direction.

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

. CARL BORNMANN.

Witnesses:

- R. W. SMITH,

IlnaMANN BUSSMAN, Jr.

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