US414811A - Vignetting attachment for printing-frames - Google Patents

Description

I (No Model.)

S. D. HARVEY. VIGNETTING ATTAUHMENT FOR PRINTING FRAMES.

No. 414,811. Patented Nov. 12, 1889.

UNITED STATES PATENT OFFICE.

SAMPSON DUDLEY HARVEY, OF TIITON, INDIANA.

- VIGNETTING ATTACHMUENT FOR PRINTING-FRAMES.

SPECIFICATION forming part of Letters Patent No. 414,811, dated November 12, 1889.

Application filed April 25, 1889. Serial No. 308,539. (No model.)

To all whom it may concern.-

Be it known that I, SAMPSON DUDLEY HARVEY, a citizen of the United States, re siding at Tipton, in the county of Tipton and State of Indiana, have invented a new and useful Vignetter, of which the following is a specification.

This invention relates to an improved vignetting attachment for photographic-print-in g frames; and it has for its object to provide a device of this class which shall be simple in construction and of such a nature that it may be conveniently attached to ordinary print ing-frames without altering; the construction of the latter, and by the use of which the maskframe holding the vignetting-card maybe adj usted longitudinally as well as laterally to suit the face of the negative which is to be exposed.

The invention consists in the im proved CO11- struction and arrangement of parts, which will be hereinafter fully described, and particularly pointed out in the claims.

In the drawings, Figure l is a perspective view showing a printing-frame equipped with myimprovedvignettingattachment. Fig. 2 is a longitudinal sectional view. Fig. 3 is a vertical transverse sectional view. Fig. 4: is a perspective view of the mask-frame detached.

The same letters refer to the same partsin all the figures.

A designates a printing-frame, which is of ordinary construction, and the ends of which are provided with outwardly-exten din g screwthreaded studs B B.

The vignetting attachment comprises a boxlike frame 0, made preferably of light sheet metal and fitted over the printing-frame, its ends being provided with slots D D to receive the studs B. Upon the latter are adjusted thu mb-nu ts E and washers F, by tight ening which the frame 0 may be retained securely in any desired position with. relation to the printing-frame. To the under or inner side of the frame 0 are soldered or otherwise secured leaf-springs G G, which bear against the upper face of the printing-frame, thereby tending to force the vignetting-frame in an upward or outward direction. The vignetting-frame has an aperture H corresponding with that of the printing-frame, and along the upper and lower edges of the said vignettin g-frame are secured flanges I I, which serve to retain in position the laterally;adjustable mask-frame J. The latter is also made preferably of sheet metal, and has an aperture K corresponding with those in the vignetting and printing frames. Around the edges of said aperture is soldered or otherwise secured a light wire frame or binding L, which serves partly to strengthen the said mask-frame and partly to support the vignetti ng-card ill. The

latter, which is provided with the usual notched aperture, is held in the flanges N N, which are secured along the edges of the mask-frame, and above the flanges N N are secured additional flanges O O, which serve to retain the diffusing-card P.

The operation and advantages of this invention will be readily understood from the foregoing description, taken in connection with the drawings hereto annexed.

The mask-frame may be adjusted laterally to any position to suit the face in the negative that is to be exposed for printing, and the vignetting-card and diffusing-card will likewise be adjusted longitudinally in the mask-frame for the same purpose. By loosening the thumb-screws E the springs G will force the vignetting-frame outwardly from the printing-frame, and the thumb-screws may be tightened so as to secure it in any desired position. \Vhen it shall be desired to make plain prints, this may be done by simply removing the mask-frame.

The vignctting-card may be readily exchanged for one of a different construction, and the entire device is exceedingly simple, inexpensive, and easily manipulated.

Having thus described my invention, I claim and desire to secure by Letters Patent 1. The combination, with the 'ignettingframe provided at its upper and lower edges with flanges, of the mask-frame adjustable in said flanges, having wire binding around its central aperture and provided with double flanges at right angles to its line of adjustment, substantially as and for the purpose set forth.

.2. The combination, with the vignettingframe having flanges at its upper and lower edges, of the mask-frame adjustable in said flanges and provided with a Wire binding around the edges of its central aperture and flanges along the edges of said aperture, substantially as and for the purpose set forth.

3. The herein-described improved vignetting attachment for photographic-printing frames, consisting of the vignetting-frame having flanges along its upper and lower edges, and provided With vertically-slotted ends and leaf-springs upon its under side, in combination with the mask-frame provided with a Wire binding around the edges of its central aperture, and double flanges at the edges of said aperture, substantially as and for the purpose herein set forth.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in presence of two witnesses.

: SAMPSON DUDLEY HARVEY.

\Vitnesses:

RoBT. B. ZEAUCHAMP, NATHAN BAILEY.

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