US434188A

US434188A - William ii

Info

Publication number: US434188A
Authority: US
Publication date: 1890-08-12
Anticipated expiration: 1907-08-12

Description

[No Model.) v

W. H. LEWIS. PHOTOGRAPHIO PRINTING FRAME.

I Patented Aug. 12, 1890.v

I ,1. V 4 w 4 fiflzwde JML BYW' I Z; ATTORNEY WITNESSES: IiVZNTO WW. M

UNITED STATES PATENT ()FFICE.

\VILLIAM II. LEIVIS,

OF HUNTINGTON, ASSIGNOR TOE. & II. T.

ANTHONY &

COMPANY, OF NEIV YORK, N. Y.

PHOTOGRAPHlC-PRINTING FRAME.

SPECIFICATION forming part of Letters Patent No. 434,188, dated August 12, 1890. Application filed January 27, 1890. Serial No. 338,215. (No model.)

To all whont it may concern:

Be it known that I, WILLIAM II. LEWIS, a citizen of the United States,and a resident of Huntington, in the county of Sufiolk and State of New York, have invented certain new and useful Improvements in Printing-Frames, of which the following is a Specification.

My invention relates to an improvement in printing-frames usedby photographers and others for taking sun-prints from negatives, drawings, &;c.; and it consists in a novel construction of the pressure-board of the frame whereby light is excluded from acting through the rear thereof. As heretofore constructed,

:5 the crack between the two or more hinged parts of the pressure-board has during use of the apparatus gradually widened, thus permitting light to pass through it. This of course injures the print. There have been various means employed to prevent this, but none of them entirely satisfactory. By my invention I accomplish the desired result with certainty and simplicity.

In the drawings, Figure 1 illustrates a plan 2 5 view of the back of a printing-frame embodying my invention. Fig. 2 illustrates a vertical section through the same on the line x :r of Fig. l.

A is the frame. B is the usual ledge on its 0 front face upon which the glass 'ests.

C is the pressure board, composed of two or more parts I) and D, hinged together by hinges E.

F are the spring-clamps, and G G, 850., are

the clips usually employed at the sides of the frame under which the springs F are sprung for confining the pressure-board and exerting pressure thereon.

My invent-ion consists in providing a groove H (see Fig. 2) in the edge of one of the parts 40 composing the pressure-board. which preferably extends entirely across the same, into which a corresponding projection or tongue I, made on the other part, snugly fits when the parts are flattened down as in use. It will be seen that these interlockingparts make a light tight joint when the pressure-board is flattened out during the taking of the print. It is obvious that there may be more than one tongue and groove on the edges of the respect- 5o ive pieces, if desired, and I sometimes line the interior of the groove with a suitable cloth J, in order that any wear of the parts maybe compensated for.

I claim I 1. In a printing-frame, a pressure-board comprising, essentially, a plurality of parts hinged together, each part having means whereby it may be put under pressure relative to the frame, and a tongue and groove in 60 the meeting edges of the hinged parts, substautially as set forth.

In a printing-frame, a pressure-board comprising, essentially, a plurality of parts hinged together, each part having means ()5 whereby it may be put under pressure relative to the framc and a tongue and groove in the meeting edges of the hinged parts, and a light-excluding material, such as cloth, between them, substantially as set forth.

Signed at New York, in the county of New York and State of New York, this 24cth day of January, A. D. 1890.

\VILLIAM H. LEIVIS.

\Vitnesses:

PHILLIPS ABBOTT, FREDERICK SMITH.