System for the prevention of drowning accidents

Details System for the prevention of drowning accidents System for the prevention of drowning accidents

1991-03-25

1992-02-25

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

340539, 4504, 441 89, G08B 2100

Patent

active

050917145

ABSTRACT:
A device for the prevention of drowning accidents based on the principle of underwater acoustic transmission consists in equipping an acoustic transmitter which communicates with at least one hydrophone placed at the bottom of the water, the hyrophone being connected to an alarm or to adapted rescue means.

REFERENCES:
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patent: 3810146 (1974-05-01), Lieb
patent: 4129905 (1978-12-01), Niemirow
patent: 4305143 (1981-12-01), Simms et al.
patent: 4630205 (1986-12-01), Otaka
patent: 4714914 (1987-12-01), Boe
patent: 4747168 (1988-05-01), Sing
patent: 4813025 (1989-03-01), Rowland et al.
patent: 4842957 (1989-06-01), Yamamoto et al.
patent: 5006831 (1991-04-01), de Solminihac

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