Low air warning device for scuba divers

Details Low air warning device for scuba divers Low air warning device for scuba divers

1993-12-29

1996-04-09

Peng, John K.

Communications: electrical

Condition responsive indicating system

Specific condition

36441331, 12820127, G08B 2100

Patent

active

055065716

ABSTRACT:
A low air warning device for scuba divers. The low air warning device attaches to the first stage of the air regulator, which is attached to the top of the air tank. The low air warning device, being compact and easily used, sounds an audible alarm in the event of low air levels. The low air warning device utilizes a piezo speaker element and driver, located within the waterproof housing, to produce an audible tone which is easily heard under water. The low air warning device automatically turns itself on and off utilizing a water conductivity activation switch.

REFERENCES:
patent: 4563758 (1986-01-01), Pasternostro
patent: 4658358 (1987-04-01), Leach et al.
patent: 4800373 (1989-01-01), Mayz
patent: 4882678 (1989-11-01), Hollis et al.
patent: 4949072 (1990-08-01), Comerford et al.
patent: 5033818 (1991-07-01), Barr
patent: 5191317 (1993-03-01), Toth et al.

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