US371934A

US371934A - Stretcher-frame

Info

Publication number: US371934A
Authority: US
Publication date: 1887-10-25
Anticipated expiration: 1904-10-25

Description

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H. P. GRAY.

STRBTUHER FRAME.

No. 371,934. Patented Oct. 25, 1887.

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HENRY F. GRAY, OF COLUMBUS, OHIO.

STRETCHER FRAME.

SPECIFICATION forming part of Letters Patent No. 371,934, dated October 25, 1887.

Serial No. 241,556. (No model.)

adapted to bear against the rear side of the To all whom it may concern:

Be it known that l, HENRY F. GRAY, a citizen of the United States, residing at Columbus, in the county of Franklin and State ,of Ohio, have invented a certain new and useful Improvement in Stretcher-Frames, of which the following is a specification.

My invention relates to the improvement of frames over which artists canvas or other similar material is stretched, and particularly relates to the improvement of my former invention, filed April 18, 1887, and allowed; and the objects of my invention are to produce a simple, neat, and effective device of this class, by means of which the sides and ends of the frame may readily and easily be separated to stretch the canvas thereon and frame, said pieces being mitercd at their ends in the usual manner to form a miter-joint at each corner of the frame, as shown. The front surface of each of the framepieces a adjoining one of its ends, is cut away to form a depression, b, therein in the form of an arc ofa cirole and a curved shoulder c.

The formation and arrangement of each of the pieces a being alike, I will, for convenience, describe the upper end piece of the frame and its connection with one of the side pieces.

Formed in the depressed end of the piece a at the true center of said partially-circular depression I) is a vertical rounded hole, d, through which is made to pass from the rear side a closely-fitting cylindrical metallic operating pin or bolt, 6, provided with a square head, 0, said head being adapted to project forwardly until its front end is about flush with the front surface of the framepiece at, its front extension being limitedby a circular flange formed about the base of the pin, and

frame-piece about the hole (Z. The rear end, e, of the pin projects slightly outward from the rear side of the framepiece, and is formed square or nutshaped to facilitate its engagement with a wrench. on the front end of the pin 6, and seated within the depression b,is ametallic disk, f, said disk being of such thickness as to bring its front surface flush with the front surface of the frame-piece a. This disk f is of such circumference and is mounted on the head of the pin 6 at such distance from the center of the. former as to admit of its being turned to a position admitting of the joining of the mi-- tered parts of the frame. As described in my former application, above referred to, there is made to project from the end of the piece at, below the surface of the depression Z), dowelpins h, which are adapted to enter corresponding holes formed in the adjoining piece.

The operation of my device is as follows: The parts of the frame being joined and con nected by means of the dowel-pins, the canvas i is then secured to the front sides of the frame pieces in the usual manner. Two adjoining parts of the frame may then be easily and gradually separated to stretch the canvas the desired distance by fitting a wrench over the rear square end of the pin 0, and turning the same, thus causing the disk f to revolve and press against the end of the adjoining framepiece to separate the parts, as shown in the upper and lower left-hand corners of the frame in Fig. 1. of the drawings.

While the parts are being separated, as above described, it will be seen that the dowelpins will form guides on which the moving frame-pieces may slide. It will also be seen that by the means above-described an equal movement of a side and end piece of the frame is attained'at the same time that the tendency of the j ointed parts of stretcher-frames to pinch toward each other at their front edges and leave a gap at the rear isobviated by having the separatingdisks bearing against the ends of the frame-pieces near their front surfaces.

While the objects of the invention herein mentioned are similar to those mentioned in my former application, it will be observed that they are attained by a more simple and inexpensive device,

Mounted "eccentrically Having now fully described my invention, I the operating-pin e, carrying the eccentricailywhat I claim, and desire to secure by Letters mounted disk f, substantially as and for the Patent, is purpose specified.

In a stretcher-frame, the combination of the 5 frame-pieces a, each having'a depression, I),

pin-hole d, and dowel-pins h, adapted to enter 1 dowel-holes in the adjoining frame-piece, with HENRY F. GRAY. Witnesses:

E. O. IRVINE, F. H. SHEPHERD.