US362663A - Shutter for photographic cameras - Google Patents

Description

(No Model.) Y

W. E. ROBERTS.

SHUTTER POR PHOTOGRAPHIG CAMERAS.. .Y No. 362,663. Tatented May 10, 1887.

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UNITED STATES PATENT OEEICEo WESLEY EATON ROBERTS, OF HARTFORD, KENTUCKY. l

SHUTTER FOR PHOTOGCRAPHIC CAMERAS.

SPECIFICATION forming part of Letters PatentNo. 362,663, dated May l0, 1887. Application tiled December 15, 1886. Serial No. 221,595. (No model.)

To all whom, it may concern:

Be it known that l, WEsLEY EATON RoB- ERTs, of Hartford, in the county of Ohio, and State of Kentucky, have invented new and useful Improvements in Shutters for Pho tographic Cameras, ofwhich the following is a full, clear and exact description.

This invention relatesy to camera-shutters made up of two pivoted parts or sections conh trolled as regards their opening movement, which is away from each other, by a hand-bulb pneu matic attachment; and the invention consists in novel means for communicating motion from the pneumatic attachment to the divided shutter, and for securing a close action to said shutter and holding it closed when shut.

Reference is to be had tothe accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in both figures.

Figure l is an interior view of the front end ofa camera with my invention applied, and Fig. 2 a transverse section of the same upon the line x x in Fig. 1.

A is the front end of the camera, in the front board, b, of which is the usual aperture, c, for passage of the light as transmitted through the lens or lenses carried by the tube B, as usual.

CC are the two sections of the divided dropshutter, pivoted above, as at d d, to the board b, on its inside, and meeting, when closed, by an overlapping vertical joint in central transverse relation with the aperture c, and having the pivots d cl so arranged that the' shuttersections, when free, close by their own weight within a keeper, D, at theirlower ends. This keeper has astop or partition, u, across it in the meeting line of the shutter-sections, and the shutter-sections have notches c in their lower ends, so that when said sections come together the partition u in the keeper D will stop them, and at the same time allow them to close perfectly tight. Fig. l shows by full lines the divided shutter as fully open, and by dotted lines the same as closed.

The board b is independent of the headblock or front board, b, of the camera, and may be secured by screws to the latter on its inside, as shown in Fig. l, whereby said shutter-carrying board b may be attached and detached at pleasure.

The shuttersections C C are more orl less opened, as required, and for a longer or less period to give the necessary exposure for the taking of the picture, by squeezing with the hand upon an elastic bulb, E, of a pneumatic attachment, such action causing the air in the bulb to be compressed and to be forced along a tube, F, and within a small cylinder, G, iitted on the outer end of said tube, andsecured on thetop of the forward end portion of the camera-box, over the divided shutter. L This cylinder G is fitted with a plunger, H, that, as the air is compressed in rear of it by squeezing of the handbulb E, is forced outward and caused to ,open the shutter-sections from over the aperture c by pulling upon a cord, e, secured to an arm, f,

. upon the plunger, and which, passing through the top of the camera-box, is connected by a hook, g, and loop 7L with a doubled or divided cord, c', that, passing through an eye or guide, s, inside of Vthe camera, is attached to the shutter-sections OC upon the off side of their pivots or fulcrums. The hook-and-loop connection g h between the cords e e', which virtually form but a single cord, provides for the convenient and ready attachment and detachment ofthe shutter-sections C C when required.

\V.hen hand-pressure is removed from the elastic bulb E, then the plunger H returns to its normal inward position and the shuttersections C C drop and close, as shown by dotted lines in Fig. l.

lf it is desired to keep the shutter-sections open for any very prolonged period of time, a clamp of any suitable kind may be applied to the tube F, to retain the compressed air back of the plunger H.

When the divided shutter is closed, light is effectually excluded from entering the camera through the lens-tube and aperture c.

To prevent any rebound of the shutter-sections as they are closed or brought together, a latch, I, is p'ivoted, as at t', to the one shuttersection and made to automatically engage with apin or catch, k, upon the other shutter-section, and so keep the two shuttersections closed as they come together. This latch works within a staple, Z, that serves to guide it'and form a rest or support for it. Furthermore, said latch is connected by a cord, m, with the cord or cords e e', or, if desired, directly with the plunger H, so that when the divided drop-shutter is opened said latch will be simultaneously IOO raised or lifted from its engagement with the catch and adjusted or turned to a position out of the Way of any interference with the aperture c of the camera, as shown by full lines :in 5 Fig. 1.

The support for the lens-tube may be suitably constructed, if desired, to provide for a carriage adjustment of said tube. To provide for this the boards b L are made, when secured 1o the one upon the other, to give a combined thickness which will admit of the carriage movement of the lens/tube.

Having thus fully described my invention7 what I claim as new, and desire to secure by 15 Letters Patent, is*

1. The combination, with a caineralsliutter composed of two independent pivot-ed risingand-i'alling sections, G C, and with the lexible air bulb and tube F, of the cylinder G, plunzo ger H, and the cords or eordseetions e e', snb

stantially as spceilied.

2. The combination, with the camera-box having an exposingaperture in its Vforward end, oi" the pendent shutter-sections C C, the

25 keeper D, the cords or cord-sections e e, the

ter-sections and means, substantially as de- 3o scribed, for opening the saine, of an automatically-closing latch carried by the one shuttersection and adapted to engage with a catch upon the other shutter-section, and a cord or connection between said latch and said shutter-opening means, essentially as specified, whereby the shutter-sections are kept from rebounding when closing and the latch is released and adjusted ont of the way simulta neonsly with the opening of the divided dropsliutter, as set forth. l

4L. The combination, with the pendent sl1utter-sections G C and the cords or cordseetions e e', adapted to open the divided drop-slint ter, ofthe cord m, the latch l, and the catch In, 45 substantially as shown and described.

WESLEY EATON ROBERTS. XVitnesses:

T. M. SMITH, Ir-mins ANDERSON.

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