US309736A - Photographic-printing frame - Google Patents

Description

Patented Dec. 28, 1884.

J. A. H. PARSONS PHOTOGRAPHIG PRINTING FRAME.

(No Model.)

VVITJVESSES J'O :5, Jazz UNITED STATES PATENT OFFICE.

JOHN A. H. PARSONS, OF IYHEE'LING, "WEST VIRGINIA.

PHOTOGRAPHlC-PRINTiNG FRAME.

SPECIFICATION forming part of Letters Patent No. 309,736, dated December 23, 1884.

Application filed June 19, 1884. (X0 model.)

T 0 tZZ whom it may concern.-

Be it known that I, JOHN A. H. PARSONS, a resident of Vheeling, in the county ofOhio and State of lost Virginia, have invented certain new and useful Improvements in Photographic-Printing Frames; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same, refer- 'ence being had to the accompanying drawings, and to letters of reference marked thereon, which form a part of this specification.

This invention relates to certain improvements in photographic-printing frames; and it has for its object to provide a vignetting attachment that may be readily attached to any frame and the parts adjusted so as to secure the proper vignetting result when exposed for printing, as more fully hereinafter specified. This object I attain by the means illustrated in the accompanying drawings, in which Figure 1 represents a perspective view of an ordinary printing-frame, showing my improved vignettin g attachment applied thereto. Fig. 2 represents a longitudinal vertical sec tion of the printing-frame and the vignetting attachment; and Fig. 3 represents a back view of the printing-frame, showing a side view of the clamps by which the vignetting attachment is secured thereto.

The letter A indicates the printing-frame, which may be of the ordinary or any approved construction, and B indicates the vignetting -frame. The said vignetting -frame consists of a flat sheet of metal having upturned edges B on flanges at the sides and a central opening of rectangular or other shape, as shown. The said vignetting-frame is secured to the printing-frame by means of the longitudinal clamping-plates O, which are preferably constructed of metal, having downwardly-turned flanges D at their upper edges, which set over the side flanges of the vignetting-frame and hold it to the face of the printing-frame, at the same time allowing the vignetting-frame to be adjusted longitudinally on the printing-fra1ne. The vignetting-frame, around its opening, is provided with a vertical rim, E, which is inclined from the lower to the upper end, and over this rim is fitteda similarly-shaped hood, F, which is hinged at its lower or smaller end to the vignettingframe contiguous to the lower or smaller end of the rim E, whereby its angle may be varied with respect to the printing-frame and the negative from which the positive is to be printed. The upper plate or top of the hood has an opening, G, and the sides areprovided with springs H, secured to suitable supports, I, and having loosely-connected cross-bars K, which are adapted to hold the sheet on plate L upon the upper face or top of the hood in proper position. The said sheet or plate has a central perforation or opening, M, for the transmission of light to the negative, and is provided with the usual translucent medium of ground glass, tissue-paper, or other suitable material for softening the light toward the edges of the picture to produce the proper vignetting effect in the printed positive. The side clamps, which secure the vignetting-frame to the printing-frame, are provided with inclined slots, by means of which they may be secured to the printing-frame by the set-screws N, and at their ends are provided with bentwire braces P, by which they are made to keep their form and securely hold the upturned edges of the vignetting-frame.

As constructed, it will be perceived that the vignetting-frame may be readily applied to any printing-frame and its angle readily adjusted to suit the direction of the light, and that while the vignetting-fraine may be adjusted longitudinally to correspond to the pic ture upon the negative the vignettingplate may be adjusted in all directions, so as to produce the proper vignetting effect around the print.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, 1s-

1. The combination,with a photographicprinting frame, of the side clamps having oblique slots and secured thereto by means of set-screws, and provided with downturned flanges at their upper edges adapted to hold a longitudinally-movable Vignetting-plate, substantially as specified.

2. The combination, with the longitudinal clamping-plates, of the vignetting-plate with llanged sides adapted to move longitudinally under the clamping plates, substantially as specified.

3. The combination, with the vignetting- 5 frame having an inclined rim, of the similarly-shaped hood hinged to the vignettingframe, whereby the angle of said frame may be adjusted, substantially as specified.

at. The combination, with the yignetting- :0 frame, of the springs extending from the center to each end of the frame, and cross-wires whereby the vignetting-plate maybe adjusted and held, substantially as specified.

In testimony that I claim the foregoing as my own I hereby affix my signature in pres- 1 5 once of two witnesses.

Witnesses:

S. L. STOUT, G110. K. S'romr.

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