US1546023A - Tennis-racket frame - Google Patents

Description

July 14, 1925.

W. C. RASTETTER TENNIS RACKET FRAME Filed Aug. 25, 1924 INVENTR ATTORNEY Patented July 14, 1925.

UNITED STATES WILLIAM: C. RASTETTER, OF FORT WAYNE, INDIANA.

TENNIS-RACKET FRAME.

Application led august 25, 1924. Serial No. 733,915.

To all whom t may concern.'

Be it known that I, l/VILLIAM C. Basra' TER, citizen of the United States of America, and resident of Fort Vayne, in the county of Allen and State of Indiana, have invented certain new and useful Improvements in rlennis-laclret Frames, of which the following is a specification.

This invention relates to improvements in tennis racket frames, and the object thereof is to so construct the frame as to afford added strength to those parts of the frame in the region of the juncture of its loop and handle and thus reduce the tendency of the frame to become fractured at these points.

This object is accomplished by the construction illustrated in the accompanying drawing in which Fig. l is a fragmentary front elevation of a structure embodying the invention, there being portions broken away; and F ig. 2 is a side elevation of the saine.

rIhe characters appearing in the description refer to parts shown in the drawings and designated thereon by corresponding characters.

The invention comprises an oval frame l formed of wooden or fibrous laminae 2, 3, A, 5, 6 and 7 glued together, there being a heart 8 and handle 9 fixed in connection with the terminals of the laminac in the customary manner. Also, a reinforcing strip l0 is secured upon the top of the heart and contiguous portions of the frame.

In each side of the frame, midway between its front and back is interposed a reinforcement l1 constructed of wooden or fibrous material that extends in a plane at right angles to those of the laminae of which the frame is composed, the reinforcement extending also into the corresponding side of the heart and through the strip 10. The reinforcement may be formed of laminae l2, 13 and lll and is glued in place in the frame.

rThe frame has made therein the customary series of holes l5 for the reception of the strands (not shown) with which the frame is strung, the holes 16 within the region of the juncture of the loop of the frame and the heart are disposed through the corresponding reinforcements. j

The outer marginal edge of each reinforcement extends through and is flush with the outer surface of 'the external lamina 7, and its inner marginal edge extends through and is flush with the exposed surface ofthe strip 10. The ends 17 of each reinforcement converge inwardly respecting the frame and bear against the corresponding adjacent surfaces thereof so that the reinforcement is wedged in place and thus prevented` from being drawn inwardly towards the opening of the frame by the tension of the strands.

As the reinforcements lie in a common plane at right angles to the laminae of the frame, rigidity to a greater degree is afforded those regions of the frame when thus reinforced than in the usual structure and a corresponding stiffness in the frame is effected.

What I claim is l. A tennis racket frame consisting of a loop formed of fibrous laminae and having a contiguous handle, a heart fixed at the juncture of the loop and handle; a strip covering the top of the heart and portions of the loop adjacent thereto; and a reinforcement extending into each side of the frame in a plane midway between its front and back and at right angles to the laminae of the frame, the ends of each reinforcement extending convergently inward respecting the frame and bearing against the corresponding surfaces thereof adjacent thereto.

2. In a tennis racket frame having a loop and contiguous handle including a heart at its juncture with the loop, the loop of which is formed of fibrous laminae that extend around the loop in corresponding curved planes disposed in successive order from the 'inner perimeter of its rim to its outer perimeter; and a reinforcement set into each side of the frame at the juncture of the loop and handle portion in a plane midway between its front and back and at right angles to the laminre of the frame, the ends of each reinforcement extending convergently inward respecting the frame and bearing against the corresponding surfaces thereof adjacent thereto.

In testimony whereof I affix my signature in presence of two witnesses.

WILLIAM C. RASTETTER. Witnesses:

MATILDA- METTLER, WALTER G. BURNS.

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