Wave motion detector for swimming pool

Details Wave motion detector for swimming pool Wave motion detector for swimming pool

1992-04-28

1993-12-07

Williams, Hezron E.

Communications: electrical

Condition responsive indicating system

Specific condition

340573, 367136, G08B 1300

Patent

active

052686736

ABSTRACT:
A swimming pool alarm responsive to wave motion that will produce a signal when two waves exceeding a threshold level of amplitude are sensed within a preset duration of time. A transducer senses air or water pressure changes and produces electrical signals corresponding to the changes. A comparator system, connected to the transducer, receives the transducer signals and, if the signals exceed a preset threshold level, transmits a signal to the discriminator system. The discriminator times the signals received from the comparator and when two signals are received within a specified period of time, a third signal is generated. A warning device such as an alarm is connected to the discriminator and will be activated by the third signal.

REFERENCES:
patent: 4932009 (1990-06-01), Lynch

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