US65314A - Improvement in peotogkaphic-cameeas - Google Patents

Description

May 28. 1867.

'f'alfw Patented G. W. VENNER.

Photographic Camera.

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IMPROVEMENT IN PHOTOGRAPHE-CAMERAS.

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TO ALL WIIOM IT MAY CONCERN:

Be it known that I, GEORGE lV. VBNNER, of Charlestown, in the county of Middlesex, in the State of Massachusetts, have invented an Improvement in Camera-Boxes; and I do hereby declare that the following is a full and exact description of the saine, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

lVature.

The nature of my invention consists in a peculiar apparatus, by means of which the sensitive plate in a camera-box may be moved so as to bring each part of it successively opposite to the perforations in the diaphragm the diaphragm itself` always remaining nearly stationary in relation to the adjusting-board, and being con nected with the camera-box by a sliding-frame and a folding screen.

To enable others skilled in the art to malte and use my invention, Iwill proceed to describeits construction and use.

Figure 1 is a perspective view of an ordinary camera-box, A, 'resting upon an adjusting-board, B C.

Figure is a section in perspective, showing a part of a camera-box, and showing especially my arrangement for exposing the several parts ofthe sensitive plate successively to the action of light.

Figure 3 is a longitudinal vertical section.

Figure 4 is a plan of the box on its adjusting-board, B. The dotted lines in this drawing represent one of the positions the box takes as itturns on its swivel-pin, K.

Figure 5 is a cross vertical section.

Figure 6 is a diagram showing how the dierent parts of the sensitive plate are successively exposed to the action of the light.

The camera-box A is connected with the board B by the swivel-pin K, tig. 4. The position of this pin K may be moved at will to the points represented by K K K", tbc. The board B is attached to the board Gby means of a hinge and the piece D, or by any suitable mechanical device. The piece E, figs. l, 3, and 5, is hinged to the lower board C, and serves as a button to hold up the upper board B, as shown in figs. 3 and 5.

From the above description, and the drawings, it will be seen that the box can be turned or swivelled both horizontally around the point K and vertically about the piece I). Upon the sides of the box A I fix two wires or bars, a a', fig. 2. Upon these` wires I hang a frame, M, gs. 2, 3, and el. Attached to the two sides of this frame, and to the side of the box, are two folding screens, figs. 2 and The screens are made of an opaque flexible material, and are used'to protect the plate from the action of light. This frame, M, is free to slide sidewise on the wires a a', or, more correctly, the wires are free to slip through the frame as the box itself` is moved from one side to another. It can be seen that the frame M moves vertically with the box, but not horizontally, so that any movement of' the box upon the board B causes the frame M to approach one side or the other ofthe box. Ailixed tothe frame M, in a vertical position, are the two wires Z2 Zi', fig. 2. Upon these wires slides a second frame, J, figs. 2 and 5. This frame, J, is connected with the lower board C by means of the linl; H, the roller I, and the caps c c. The connecting-bar H is connected with the frame J by e small loosefitting bolt, as shown. It may be seen that the second fra-me J has a vertical motion in relation to the box, but is nearly stationary in relation to the lower board C. The other parts of the box, and the adjusting-board, are already understood and in common use, and therefore requireno particular description.

Having described the construction of my invention, I will illustrate its use. For example, let us suppose that we require to make sixteen pictures on one plate. I put into the frame J a diaphragm perforated, as shown at N', fig. 5. I now adjust the box into what I call the first position, that is, with its rear end down, as shown in tig. I, and turned to the lei't, as shown by the dotted lines in fig. 4. 'Ihe plate is thus exposed, and four impressions, occupying position corresponding to n; fc :c tig. 6, are taken then moving the box to the right, against the pin p, take four more impressions corresponding to g2 2/2 y2 y2, on the diagram, iig. (i, then raise the rear of the box, and having buttoned it, as shown at iig. 3, four more impressions are taken, corresponding to o3 o o3 o, on'the diagram, iig. 6; then swing the box to the left of the pin P, and take four more impressions corresponding to v4 o* a* v4, on the diagram, fig. 6.

My invention may be applied to any case when it is desirable to make more impressions upon one plate than there are tubes in the camera.. By substituting a. single lens for the foul', and removing the diaphragm, the camera may be used for all ordinary purposes, when single picturesare desired.

Claims.

Vhatl claim as my invention` and desire to secure by Letters Patent, is-

1. The compound sliding-frames M and J, made substantially as described, and 'for the purposes set forth.

2. The method of operating the said sliding-frames M and J by means of the bar Lroller I, caps c c', or their mechanical equivalent, and the lower part of the adjusting-board C. v

3. The foldingscreens d d', substantially as described, end for the purpose set forth.

` GEORGE W. VENNER.

Witnesses:

WILLIAM EnsoN, FRANK G. PARKER. 1

Images