Boots – shoes – and leggings
Patent
1987-04-28
1989-03-21
Smith, Jerry
Boots, shoes, and leggings
273 29A, 273 31, 340323R, G06F 1544
Patent
active
048149861
ABSTRACT:
A device for monitoring the relative point of impact of an object in flight proximal a reference line on a surface. The reference line may be imaginary or it may be visually perceptible. In a preferred application, the reference line is the outer edge of a game court boundary stripe such as the service box stripe or the base line stripe on a tennis court. At least one plane of radiated energy, preferably light beams, is pre-positioned with respect to the reference line. Detectors, preferably photodetectors, provide data signals indicative of the relative elevation of the object at two successive points in time based on intersection of at least one plane of radiated energy by the object. A programmed microcomputer determines whether the point of surface impact is to one side or another of the reference line, or coincident with the reference line, based on the data signals. The microcomputer commands an annunciator to provide an audible or visual indication of the determination.
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Kibby Steven G.
Smith Jerry
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