Method of and apparatus for the acoustic signalling of cases of

Details Method of and apparatus for the acoustic signalling of cases of Method of and apparatus for the acoustic signalling of cases of

1987-12-21

1989-08-01

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

181122, 181402, 367141, 367173, 340573, 340693, G08B 1320

Patent

active

048536911

ABSTRACT:
The invention describes a method and apparatus for the acoustic signalling of cases of drowning in swimming pools, to guarantee reliable trigger of the alarm while avoiding any false alarms. This is effected basically by a switching element (1) in a water-tight encapsulation, which is disposed beneath the surface of the water and which, in the event of an alarm, triggers a first alarm device (2) and delivers an acoustic signal via a signal horn (5). A transmitter (6) is also connected to the alarm device (2) and transmits the alarm signal to a receiver at a distance and to another alarm device (10). Instead of the switching element (1), a microphone (12) can advantageously be used for cases in which the swimming pool water is frozen.

REFERENCES:
patent: 3999178 (1976-12-01), Hamilton
patent: 4121200 (1978-10-01), Colmenero
patent: 4187502 (1980-02-01), Beverly et al.
patent: 4536747 (1985-08-01), Jensen
patent: 4641127 (1987-02-01), Hogan et al.
patent: 4665385 (1987-05-01), Henderson

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