US879477A - Tennis-racket. - Google Patents

Description

No. 879,477. V PATBNTED FEB. 1a, 1908.

- c. H. KRUGER.

TENNIS RAGKBT.

APPLICATION FILED MAE-12, 1906.

UNITED STATES PATENT OFFICE.

CHARLES H. KRIIGER, OF BRADFORD, ENGLAND.

TENNIS-RACKET.

Specification of Letters Patent.

Patented Feb. 18, 1908.

Application filed March 12' 1906- Serial No. 305.736.

' of which the following is a specification.

This invention relates to improvements in tennis rackets, and has for its object the application of a moving weight to the handle 0 the racket, in such'a manner that the balance of the implement may not be impaired, and that the striking power may be considerably increased, such additional power being applied at the desired time.

n describing my invention in detail, reference is made to the accompanying sheet of drawings, similar letters indicating similar parts, in which,

: Figure 1 re resents a sectional elevation of a portion 0 a tennis racket, showing my improvement applied thereto. Fig. 2 re resents an enlarged cross section on line a. in Fig. 1. Fig. 3 represents a detail hereinafter referred to. V

In carrying out my invention, I show and describe the same as a plied to a tennis racket, though it will be 0 vious that my improvement may be ap lied to other implements for games and exercises, such as hockey sticks, cricket bats, baseball clubs, Indian clubs, golf clubs, and the like.

My improvement consists in the application of a moving weight to the interior of the handle or like of the desired im lenient. In the case of a tennis racket a. ho e or channel A is bored or otherwise suitably formed in the handle B, such hole or channel bei of suitable diameter and length, exten 'ng preferably into the lignum vitae making up piece 0. Into the channel A I insert a quail tity of mercury which will readily travel up and down the channel, said mercury being very quick and certain in its action, and

I not liable to stick, the amount depending on individual choice. The channel may be bored in existing rackets, and after the desired weight-medium has been placed there in, the end A of the channel stopped up with a stopper or handle finishe off in the ordinary manner, as shown in Fig. 3; or the channel A may be formed in the handle B and making up piece before the racket is put together.

The plug D may take the form of a screw plug, and be arranged so that the user of the implement may remove and refix the same should it be found necessary to'. alter the weight. It is desirable to have the channel project as far into the piece C'as possible, and where a screw such as S is used, the channel A should be of larger diameter than the screw. In the case of a cricket bat, the channel would be formed in the blade and extend towards the base of the same.

In implements provided with my improvement, a great increase in weight and striking and driving power may be obtained, without the balance being materially aflected and in the case where mercury is used, the additional weight up to, say 5 ounces, in a 13 ounce racket, will be hardly perceptible to the user, and in many instances the movement of the mercury, when the im lement is being used-for striking will materially assist the stroke.

What I claim as my invention is In implements for games and exercises, a tennis racket handle including the lignum vitae making up piece,-said handle having an internal channel therein extending into the lignum vitae making up iece and a weight freely movable in said channel saidweight being composed of mercury.

In witness whereof I have hereunto set my hand in the presence of two "witnesses.

CHAS. H. KRI JGER:

Witnesses:

Lnwrs WAUGH, JosEPH F. KIRBY.

(plug D, and the end of the

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