US459938A - richards - Google Patents

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Publication number
US459938A
US459938A US459938DA US459938A US 459938 A US459938 A US 459938A US 459938D A US459938D A US 459938DA US 459938 A US459938 A US 459938A
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Prior art keywords
attachment
vignetting
richards
face
photographic
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B27/00—Photographic printing apparatus
    • G03B27/02—Exposure apparatus for contact printing
    • G03B27/14—Details
    • G03B27/28—Edge-masking devices

Definitions

  • My invention consists in forming a vignetting attachment of papier-mach, paper-pulp, or other plastic material, molded or pressed into shape, making a light, cheap, and durable article. [5 It also consists in setting out the face of the attachment, so that increased strength is obtained, and the light may be diffused to a greater extent and the vignette thereby made softer.
  • Figures 1 and 3 represent perspective views of vignetting attachments embodying my invention.
  • Fig. 2 represents a longitudinal section on line a; 00, Fig. 1.
  • Fig. 4 represents a longitudinal section on line 1 y, Fig.
  • A designates a vignetting attachment for a photographicprinting frame, the same being formed of papier-mach or other plastic material, which is molded or pressed into shape between suitable dies, the main portion of the attachment being set out, thus increasing the distance between the line of the negative and the tis- 3 5 sue-paper 011 the block, whereby the light is diffused to a great extent and the vignette made softer, the shape of the attachment rendering it stronger and more durable.
  • the set-out or raised portion of the face is inclined, being especially designed for ac dark draperies, the higher portion having a greater spread of diffused light than the lower part.
  • the attachment is formed by pressing, stamping, or molding, it is cheaper and lighter 5 than heretofore and possesses increased strength.
  • a vignetting attachment for photographic-printing frames formed of plastic material having its face set out, said face portion being integral with the attachment, substantially as described.
  • a vignetting attachment for a photographic-printing frame formed of plastic material pressed or molded into shape and having its face set out, said face portion being integral with the attachment, substantially as described.
  • a vignetting attachment for photographic-printing frames consisting of a piece of plastic material pressed into shape and having an integral inclined face, substantially as and for the purpose set forth.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mirrors, Picture Frames, Photograph Stands, And Related Fastening Devices (AREA)

Description

(No Model.)
G. H. RICHARDS. PHOTOGRAPHIO VIGNETTING ATTACHMENT. No. 459,938. Patented Sept. 22, 1891.
UNITED STATES PATENT OEEIcE.
GEORGE I-I. RICHARDS, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR, BY MESNE ASSIGNMENTS, TO AMOS J. LAMBORN, OF SAME PLACE.
PHOTOGRAPHIC VIGNETTlNG ATTACHMENT.
SPECIFICATION forming part of Letters Patent No. 459,938, dated September 22, 1891.
Application filed November 2, 1889. Serial No. 329,080. (No model.)
To all whom, it may concern.-
Be it known that I, GEORGE H. RICHARDS,
a citizen of the United States, residing in the city and county of Philadelphia, State of 5 Pennsylvania, have invented a new and useful Improvement in Vignetting Attachment for Photographic-Printing Frames, Which improvement is fully set forth in the following specification and accompanying drawings.
My invention consists in forming a vignetting attachment of papier-mach, paper-pulp, or other plastic material, molded or pressed into shape, making a light, cheap, and durable article. [5 It also consists in setting out the face of the attachment, so that increased strength is obtained, and the light may be diffused to a greater extent and the vignette thereby made softer.
Figures 1 and 3 represent perspective views of vignetting attachments embodying my invention. Fig. 2 represents a longitudinal section on line a; 00, Fig. 1. Fig. 4 represents a longitudinal section on line 1 y, Fig.
Similar letters of reference indicate corresponding parts in the several figures.
Referring to the drawings, A designates a vignetting attachment for a photographicprinting frame, the same being formed of papier-mach or other plastic material, which is molded or pressed into shape between suitable dies, the main portion of the attachment being set out, thus increasing the distance between the line of the negative and the tis- 3 5 sue-paper 011 the block, whereby the light is diffused to a great extent and the vignette made softer, the shape of the attachment rendering it stronger and more durable. In Figs.
1 and 2 the set-out or raised portion of the face is inclined, being especially designed for ac dark draperies, the higher portion having a greater spread of diffused light than the lower part.
As the attachment is formed by pressing, stamping, or molding, it is cheaper and lighter 5 than heretofore and possesses increased strength.
Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is
1. A vignetting attachment for photographic-printing frames formed of plastic material having its face set out, said face portion being integral with the attachment, substantially as described.
2. A vignetting attachment for a photographic-printing frame formed of plastic material pressed or molded into shape and having its face set out, said face portion being integral with the attachment, substantially as described.
3. A vignetting attachment for photographic-printing frames consisting of a piece of plastic material pressed into shape and having an integral inclined face, substantially as and for the purpose set forth.
GEO. H. RICHARDS.
Witnesses:
JOHN A. WIEDERsHEIM, L. JENNINGS.
US459938D richards Expired - Lifetime US459938A (en)

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