Boots – shoes – and leggings
Patent
1980-07-16
1984-02-14
Smith, Jerry
Boots, shoes, and leggings
273 29R, 273 31, 340323R, G06F 1544, A63B 6100
Patent
active
044320582
ABSTRACT:
Systems are disclosed for making automated decisions in tennis based on analyzing effects resulting from the bounce of a tennis ball by means of pattern recognition in order to determine whether the detected "bounce" was a valid bounce of a tennis ball and not caused by other events. The tennis court is laid out with electrical circuits which can define "in" and "out" areas of the court. These circuits are connectable to a network of micro-computers which can analyze the makes and breaks in the electrical circuits resulting from the bounce of an electrically conductive tennis ball and compare said results with predetermined patterns of makes and breaks caused by known valid ball bounces. The systems are designed on a flexible basis to operate with or without an umpire.
The systems use an electrically conductive tennis ball which makes and breaks electrical circuits when bouncing on them. The resulting pattern of makes and breaks is characteristic for an electrically conductive tennis ball in distinction by way of first example from the pattern resulting when a steel tennis racket is touched against electrical circuits deployed around the court and by way of second example from the pattern resulting when an electrically conductive tennis ball rolls along the ground (or remains motionless) in contact with said electrical circuits. The systems may also employ infra-red radiation beams to produce the patterns.
REFERENCES:
patent: 3415517 (1968-12-01), Krist
patent: 3774194 (1973-11-01), Jokay et al.
patent: 3854719 (1974-12-01), Supran
patent: 3982759 (1976-09-01), Grant
patent: 4004805 (1977-01-01), Chen et al.
patent: 4109911 (1978-08-01), Van Auken
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