Alarm to detect accidental sudden or slow falls from children in

Details Alarm to detect accidental sudden or slow falls from children in Alarm to detect accidental sudden or slow falls from children in

1990-05-23

1992-05-19

Ng, Jin F.

Communications: electrical

Condition responsive indicating system

Specific condition

340566, 340595, 340619, 340625, G08B 2300

Patent

active

051152223

ABSTRACT:
The disclosure pertains to a device for detecting sudden or slow immersion of a body into a swimming pool. More specifically, the invention pertains to a device to detect the accidental immersion of children into swimming pools. In a first embodiment, a first chamber is submerged in the water, and communicates with the water through tubes, so that disturbances in the water not caused by the immersion of a body are damped. A second chamber is in communication with the first chamber and has a sensor disposed inside it. The immersion of a body in the water causes a variation in the air mass contained in the chambers, which is sensed by the sensor which then sounds an alarm.

REFERENCES:
patent: 4017842 (1977-04-01), Vineyard
patent: 4029920 (1977-06-01), Odell
patent: 4069405 (1978-01-01), Fima
patent: 4080985 (1978-03-01), Eagle
patent: 4533907 (1985-08-01), Thatcher
patent: 4571579 (1986-02-01), Woolley
patent: 4771272 (1988-09-01), Barnes

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