US150497A - Improvement in photographic-printing frames - Google Patents

Description

2Sheejs--SheetL I. M. VAN WAGNER S. E. P. GRISWLD.

Photographic Printing-Frames.

N0 50 497 Patented Maj/5,1874.

iff @72g ATTURN S. J

, Q Sheets--Sheetl. M. VAN WAGNER & E. P. GRISWDLD.

Photographic Printing-Frames. N0,.50,497. Patenredrvlay 5,1874.

Ulvrrrm iSTATES PATENT @Errea isAAo M. vAN wAeNnn, or NvAcK, AND EZnA r. emswoLD, or New voi-nr, N. Y.

IMPROVEMENT IN PHOTOGRAPHIC-PRlNTING FRAMES.

Specification forming part of Letters Patent No. 150,497, dated May 5, i874; application filed January 3l, 1874.

To all whom tt may concern:

Be it known that we, IsAAC M. VAN WAG- NER, of Nyack, in the county of Rockland and State of New York, and EZRA I. GRiswoLD, ot' the city, county, and State of New York, have invented a new and useful Improvement in Photograph-Printing Apparatus, oi' which the following is a specification:

This invention relates to new and important improvements in apparatus for printing photographie pictures; and consists in an adjustable vignetting attachment to the ordinary printing-frame now in use, by means of which the light-opening, by means of longitudinal and transverse or other movable slides, is adj usted to the picture on the negative. It also consists in a device for varying the distance and position of the light-opening from the negative. It also consists in a contractin g and expanding diaphragm, for varying the form and size of the light-opening, all as hereinaiter set forth and described.

In the accompanying drawing, Fi gure l represents a top view, showing the light-opening and the movable slides. Fig. 2 is a view ot' the reverse side ofthe common printing-frame, showing, also, the edge of our attachment or adjusting-frame. Fig. 3 is a cross-section of Fig. 2, taken on the line -zv Fig. 4. is a longitudinal section taken on the line y y ot' Fig. 2. Fig. 5 is a side view of the ordinary plate, through which the light-opening is made, as at present used. Fig. 6 is a view of the expansible and contracting diaphragm, the construction being represented in dotted lines. Fig. 7 is a cross-section of Fig. 6 on the line z z.

Similar letters oi' reference indicate corresponding parts.

A represents the old or common printingframe. B is a frame which surrounds A, which is provided with springs C, or with any other device, as bellows, straps, Src., by means of which this frame B may be raised and lowered, and fastened in any desired position, either level or parallel with the frame A, or inclined in either direction, as may be desired.

D D are grooved cleats on the upper side ot' the frame I3. E is a slide confined in the grooves ofthe cleats I) D, so that it is readily moved back and forth on a line parallel with the cleats. F F are grooved cleats on the slide E. These cleats are placed at right angles with the cleats D D. G isa slide, which is readily moved back and forth on a line parallel with the cleats F F. rEhe slide E has a large opening in its center. The smaller slide Gr has an opening, over which the plate which contains the light-opening is placed, and which is adjusted, by means ot the movements before described, to the picture on the negative.

Instead of this slide G, a slide or diaphragm having an opening which may be expanded or contracted, by means of adjustable plates or otherwise, maybe employed. H represents such a slide, (see Fig. 6,) on which is fastened a plate, I, which has slots, J, in it. K are sliding plates between the slide H and the plate I, which are guided by means of a pin, I', in each plate, which work in the slots J. These sliding plates K are arranged so as to allow their edges to lap over each other, as seen in the drawing.

By means of a diaphragm of this description, having a light-aperture adjustable as to form and size, the delay and expense of eutting a plate for the light-opening from metal, pasteboard, or other material are avoided.

XVe do not confine ourselves to any particular kind or style of diaphragm. It may be made in any manner, and of any number ot pieces. n A

The device for varying the distance of the light-opening from the negative and fastening it either parallel with the negative or in an inclined position thereto may be made in any manner, and set-screws L L, or other means, may be employed for fastening it in the desired position.

By means ot' this adjustment the proper exy pression and blending of shades are given the picture and the vignette.

M are springs for fastening the light-open- 4. The adjustable slide G and cleats F F,in combination with the slide E, for the purposes described.

5. The slide or diaphragm H, or equivalent expanding and contracting` device, by means of which the light-aperture is Varied at will in size and form, substantially as described.

ISAAC M. VAN WAGNER. EZRA I. GRISWOLD.

Witnesses:

T. B. Mosman, ALEX F. ROBERTS.

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