Swing speed indicator

Details Swing speed indicator Swing speed indicator

2005-02-15

2005-02-15

Luu, Thanh X. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

C356S028000

Reexamination Certificate

active

06855921

ABSTRACT:
A portable speed measurement apparatus for determining and displaying speed characteristics of a body passing through a target zone includes radiant energy beam generation units disposed in a first housing, the emitted beams of radiant energy defining a target zone therebetween, and radiant energy sensing units disposed in a second housing, the radiant energy sensing units operably generating an output electrical signal upon perception of pre-determined radiant energy characteristics. The first and second housings are configured and are sufficiently portable so that detection and speed measurement of a body moving through the target zone may be accomplished in any desired plane.

REFERENCES:
patent: 3685909 (1972-08-01), Schwartz
patent: 4574238 (1986-03-01), Weinlich
patent: 5298738 (1994-03-01), Gebert et al.
patent: 5634855 (1997-06-01), King
patent: 5833549 (1998-11-01), Zur et al.

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