Swimming pool alarm system

Details Swimming pool alarm system Swimming pool alarm system

1976-03-24

1978-01-17

Caldwell, Sr., John W.

Electricity: circuit makers and breakers

Float

Float and pressure

340244A, 340261, 248301, 220 18, H01H 3602

Patent

active

040694054

ABSTRACT:
A swimming pool alarm system includes a sensor device mounted at the water line of the pool and carrying a magnetically actuated, normally closed switch and a magnet carried by a float for maintaining the switch closed when the water is at a predetermined level whereby the switch closes if the float moves downwardly away therefrom in response, for example, to lifting of the device out of the pool or from wave motion of the water in the pool.

REFERENCES:
patent: 2980775 (1961-04-01), Crain
patent: 3471664 (1969-10-01), Hansen
patent: 3482237 (1969-12-01), Hamburg et al.
patent: 3778803 (1973-12-01), Jahn
patent: 3803573 (1974-04-01), Schonger
patent: 3849771 (1974-11-01), Applin

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