Device for determining swing speed of rotatable implements

Details Device for determining swing speed of rotatable implements Device for determining swing speed of rotatable implements

1987-11-23

1988-12-06

Chapman, John

Measuring and testing

Speed, velocity, or acceleration

Structural installation or mounting means

273 26B, 273186A, G01P 316, A63B 6936

Patent

active

047888636

ABSTRACT:
A device for determining swing speed of rotatable implements, for example human activated sporting goods such as a bat, a tennis racquet, etc. The device comprises a mounting base, a magnetically attractable arcuately movable member in the form of a metal plate, a stopper, the movable member upon activation coming into contact with the stopper to produce a hitting sound, a support member detachably supporting the movable member, and a rotatable disk magnet likewise supported by the support member, the movable member being rotatably movable through a rotational arcuate width between the stopper and the support member. The device further comprises a counter which may be contacted by the movable member to detect numerical frequency of rotations of the movable member.

REFERENCES:
patent: 3113781 (1963-12-01), Guier
patent: 4526036 (1985-07-01), Morrison

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