Communications: electrical – Systems – Call station
Patent
1976-08-11
1978-03-14
Swann, III, Glen R.
Communications: electrical
Systems
Call station
9313, 340235, 340421, G08B 2100
Patent
active
040793648
ABSTRACT:
An alarm apparatus which is activated upon immersion. The apparatus is adapted to be worn whenever the wearer is expected to be in the proximity of a body of open water and will sound an alarm should that wearer fall into the water. The apparatus is portable, self-contained and has a water activated release to automatically release the apparatus from the wearer upon immersion of the device. The alarm is mounted in a buoyant housing so that housing is self-righting to float to the surface of the water in an upright orientation so the alarm signal is emitted outwardly of the water when the housing reaches the surface. Various embodiments and actuating and release circuits are also disclosed.
REFERENCES:
patent: 1574485 (1926-02-01), Hylard
patent: 3638258 (1972-02-01), Black
patent: 3810146 (1974-05-01), Lieb
James D. Pauls & Associates, Ltd.
Swann III Glen R.
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