Electrical pulse counters – pulse dividers – or shift registers: c – Applications – Measuring or testing
Patent
1987-08-07
1989-04-18
Heyman, John S.
Electrical pulse counters, pulse dividers, or shift registers: c
Applications
Measuring or testing
377 5, 455344, 340556, 340565, G01C 2200
Patent
active
048233676
ABSTRACT:
The present invention provides a method and apparatus for counting the number of occurrences that a mobile unit comes within range of a stationary unit. The invention is useful in counting the number of laps which a runner or swimmer completes through a course. In one aspect, the present invention includes a timer which, in cooperation with the information generated by the lap counter, produces information corresponding to the lap time, average minutes per mile and other such data. In a preferred embodiment, a stationary transmitter emits an infrared signal to create a zone of detection which triggers a receiving unit attached to the runner or swimmer each time the runner or swimmer passes through the zone of detection.
REFERENCES:
patent: 3492582 (1970-01-01), Heywood
patent: 3580496 (1971-05-01), Neild
patent: 4371945 (1983-02-01), Karr et al.
patent: 4578769 (1986-03-01), Frederick
Heyman John S.
Rikagaku Kenkyujyo and Hochiki Corp.
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