Amusement devices: games – Aerial projectile game; game element or accessory therefor... – Target
Patent
1986-08-08
1987-05-05
Pinkham, Richard C.
Amusement devices: games
Aerial projectile game; game element or accessory therefor...
Target
24 711, 273 73E, A63B 5112
Patent
active
046626328
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a device for adjusting preferably ball-play rackets and badminton rackets. The invention is intended to produce desired tension in the strings of the racket surface, by adjusting the strings by stretching or slackening respective strings.
Ball games played with the aid of rackets have long formed part of sporting activities. Tennis is one ball game which has become increasingly popular over the past years. Participation in the sport of tennis, however, is expensive. A large part of this expense is incurred by the high cost of the conventional equipment required. The strings of a tennis racket progressively lose their tension, and consequently tennis rackets require restringing with new strings, at high cost, in order to regain the desired racket tension. This problem of high costs has culminated in the concept of effectively re-tensioning a racket with the aid of a simple device, at a fraction of the earlier costs.
Only a few devices which can be attached directly to racket strings for the purpose of tensioning the same are known to the art. None of these known devices, however, enable each string to be tensionsed individually, as is required when the extent to which the strings become stretched varies from one string to another. Neither is it possible with such devices to tension the strings alternately in opposite directions relative to the plane of the racket in the same manner as one racket string alternately tensions the strings running perpendicular thereto.
SUMMARY OF THE INVENTION
An object of the present invention is to overcome these disadvantages, by providing a device with which each racket string is tensionsed individually to the strength required, until all the strings are of uniform tension and resilience. This effect is achieved quite independently of whether the strings are initially uniformly tensioned or not when the player desires to adjust the string tension from the beginning. Another important advantage afforded by the present invention is that adjustment of the strings can be effected in an inward or an outward direction, depending upon the position of the string in relation to the undermost and nearest cross-string. As will be understood, the strings can also be tensioned laterally, in the same or different directions.
The present invention thus refers to a device for adjusting strings in preferably ball-play rackets and badminton rackets intended to produce a desired tension in a racket surface by adjusting the hardness of the string tension, and is characterized in that the device comprises a member provided with a groove adapted to receive a string, a first and second abutment spaced apart along the groove and adapted for engaging the string and a hole located intermediate the space abutments, which hole is located in the groove and extending perpendicular to a line through said two abutments, said hole being intended to cooperate with a third adjustable abutment, whereby a string is intended to be tensioned by displacing the part of the string lying between said first and second abutments by means of the third adjustable abutment to a position outside said line through said first and second abutment.
The novel features of the invention are set forth in the following claims, and embodiments of the invention are described below with reference to the accompanying drawings. It will be understood that the invention is not restricted to these embodiments, and that modifications can be made within the scope of the following claims.
BRIEF DESCRIPTION OF THE DRAWING
In the drawings:
FIG. 1 illustrates in a perspective and enlarged scale a device according to the invention;
FIG. 2 shows a device according to the invention seen obliquely from the front and having, according to a modified embodiment, holes in the front;
FIG. 3 is a cross sectional view of the device according to the invention;
FIG. 4 shows a tennis racket in a small scale provided with four devices according to the present invention;
FIG. 5 shows an exploaded view of the device accord
REFERENCES:
patent: 284969 (1883-09-01), McIntosh
patent: 1957367 (1934-05-01), Snydan
patent: 2049074 (1936-07-01), Mott
patent: 2336818 (1943-12-01), Topinka
patent: 2444743 (1946-09-01), Melidoni
patent: 2497007 (1950-02-01), Melidoni
patent: 3183565 (1965-05-01), Schwarz
Pinkham Richard C.
Schneider Matthew L.
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