Amusement devices: games – Aerial projectile game; game element or accessory therefor... – Target
Patent
1987-08-18
1990-02-13
Schwadron, Martin P.
Amusement devices: games
Aerial projectile game; game element or accessory therefor...
Target
273 77R, A63B 5300
Patent
active
049000250
ABSTRACT:
A dynamically correlated, matched set of golf clubs which comprises a plurality of golf clubs each of which has a shaft having one end with a grip and the other end with a head, wherein each grip has a substantially uniform weight, moments of force at the head end sides of said golf clubs are standardized with reference to a substantially central portion between both hands of a golf player who holds the golf club during swing about a rotating axis, and when natural frequencies at the club head end side of said golf clubs in said set are measured with reference to said central portion as a support end so that natural frequencies of arbitrary clubs A and B are given as Fa and Fb and lengths from the support end to the centers of gravity extending from the support ends to head ends of said clubs are given as La and Lb, each shaft has a stiffness characteristic satisfying a substantial relation Fa.multidot.La=Fb.multidot.Lb.
REFERENCES:
patent: 4070022 (1978-01-01), Braly
patent: 4128242 (1978-12-01), Elkins
patent: 4415156 (1983-11-01), Jorgensen
Article, "Dynamic New Ways to Match Clubs so They Feel the Same", Larry Dennis, Golf Digest Dec. 1976, pp. 560-64.
Flanigan Allen J.
Jaskiewicz Edmund M.
Schwadron Martin P.
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