US66288A - blackma ff - Google Patents

Description

lglgtaitrt tates atrut @fitta PHOTOGRAPHIG COPYING-BOARD.

aT-lgs Segnale maar mit tipa tcttcts ateit mit making putt nf tige saure.

' lO ALL WHOM IT MAY CON CERN Be it known that I, W. D. BLACKMAX, of Defiance, Detiance county, Ohio, have invented a new and improved Photographic Copying-Board; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawings forming part of this specification, in which- Figure 1 represents a side elevation, partly in section, of my improved photographic,platcholder, the plane of section being indicated by the line e e, fig. 2.

Figure 2 is a front elevation, partly in section, of the same.

AFigure 3 is a detail vertical sectional view of the same, the plane of section being indicated by the line :v zr, iig. 2.

Figure 4 is a horizontal sectional view of the same, the plane of section being indicated by the line yy, g. 2.

Figure 5 is an inside view of one of the jaws for holding the picture.

Similar letters of reference indicate corresponding parts. i

The object of this invention is to facilitate the copying of old pictures, such as photographs, ambrotypes, daguerreotypes, and others, by photographic process.

The invention consists in constructing and arranging an apparatus in which the afresaid old pictures can be held; said apparatus being so constructed that pictures of different sizes can be firmly held therein, and so that the pictures in it can be moved to-or from the camera to adjust the focus, and raised or lower to be centred.

A represents a horizontal board or platform, upon the front end of which the camera stands. In its rear end b is arranged a slot, in which a block, B, slides, said block being provided with anges c c, which overlap the edges of the slot, as shown in iig. 2. In the block B is arranged an upright sliding-post, C, which is pro vided with a ratchet-bar, d, on one side, into which a pinion, e, meshes. This pinion is mounted on a shaft, D, which extends through the whole length of that portion of the board A that is in front of the slats; the front end ofthe said shaft being provided with a crank or hand-wheel, f. By turning the said shaft D the post c can be raised or lowered-at will in the block B. Another shaft E passes from the front part of the plate A into and through the block B, being provided with a screw-thread at its rear end, and passing through a nut, g, that is arranged in the said block, as is clearly shown in fig. 3. Thus by turning the shaft E the block B and its appendages can be brought nearer to or further from the camera. The pinion e must slide on the shaft D so that it can be carried along with the block B, that portion of the shaft D being squared for the purpose. To the upper end of the sliding upright post C is pivoted a disk, F, which has two ears t L, through which the pivoting pin z'passes, as is clearly shown in iig. 2. In this disk are two slots, which are arranged on either side ofthe centre on the horizontal diameter, and as indicated in fig. 4; the said slot reaching almost from the centre to the rim, as shown. Through each one ofthe slots in the disk F passes a pin, '7', which is squared in the slot, as shown in iig. 4. From the centre ofthe disk F projects towards the rear a fixed horizontal pin, k, upon which a revolving disk, Gr, is hung, in which eccentric slots are arranged, as is clearly shown in g. 2. The pinsjpass through these eccentric curvilinear slots, and are provided with heads on their front and rear ends. The front end of each pin passes through an almost seinicircular plate H, g. 5, the cord or straight line of each plate H being vertical,l as is indicated by dotted lines in fig. 2. By revolving the disk G around the pinA R, the pins j are moved in the eccentric slots further from or nearer to the centre of the disk, and do thereby bring the plates H more or less'apart so as to adapt the apparatus for holding larger or smaller pictures. On theinner side oi' each plate H is arranged a spring, Z, which carries astraight vertical rod, m, near to and parallel with the straight edge of the said plate H, as shown in iig. 5. These rods m serve as rests or frames for the picture, and are, by turning the disk G, brought close to the edge of the picture. I is a knob, having a tubular extension, n, which fits the centre of the disk G, and surrounds the central spindle R of the disk F. On the front end of the tube n are teeth makingit appear like a clutch, and corresponding teeth are formed on the inside of the disk F, as shown in iig. 4. By turning the knob I the plate G can be drawn away from the disk F, and the plates H will thereby be clamped against the disk F, which will be understood from fig. 4; the knob I being turned so that the projecting parts of yn' are over thehigher parts of the clutch 0n Ft l Thereby the picture will be firmly clamped between the plates II and the disk F.

` coges By means of the shaft D the picture can be raised and lowered and centred; and by the shaft E it can be mo ed nearer to or further from the camera, and its focus regulated.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. A photographic copying-board, made and operating substantially as and for the purposes herein specified and described.

2. The device for ceutring the picture that is helden the plate F, said device consisting of the ratchetbar d C, pinion e, and shaft D, all made and operating substantially as herein specifi-ed and described.

3. The device for adjusting the focus of the picture that is held on the plate F, said device consisting of the sliding-block B, nut g, and screw-shaft E, all made and operating substantially as and-ior the purpose herein specified and described. A

4. The device for increasing the size of the' frame for holding the picture to be photographed, said device consisting of the stationary disk F, revolving disk G, pins jj, plates H, and spring-bars m, all made and operating substantially. as and for the purpose herein specifiedand described.

5. The device for. clampingthe picture, consisting of the revolving clutch I, iu combination with the stationary clutch F, disk G, pins j, and plates H, al1 made and operating substantially as described.

The above specification of my invention signed. by me this 27th day of March, 1867.

' W. D. BLACKMAN. Witnesses:

EDWARD H. GLnAsoN, Hanni HARDY.

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