Electronic breathing mixture control

Details Electronic breathing mixture control Electronic breathing mixture control

1978-10-23

1980-12-02

Cline, William R.

Fluid handling

Self-proportioning or correlating systems

Mixture condition maintaining or sensing

137 93, 12820422, G05D 1103

Patent

active

042365465

ABSTRACT:
An electronic breathing mixture control system which senses and controls oxygen component partial pressure of an underwater breathing mixture. Three oxygen sensors disposed within a mix chamber generate voltages proportional to the oxygen partial pressure in the mixture. These voltages are processed and compared with reference voltages using digital logic circuitry. The resulting processed signals control two light emitting diodes warning the user of improper oxygen partial pressure and in addition control a switch that actuates an oxygen valve which either restricts oxygen flow to the mix chamber or allows more oxygen to flow therein.

REFERENCES:
patent: 3556098 (1971-01-01), Kanwisher
patent: 3593735 (1971-07-01), Reiher
patent: 3675649 (1972-07-01), Basham et al.
patent: 3727626 (1973-04-01), Kanwisher et al.
patent: 3794059 (1974-02-01), Burt, Jr.
patent: 3805590 (1974-04-01), Ringwall et al.
patent: 3957043 (1976-05-01), Shelby
patent: 3973562 (1976-08-01), Jansson
patent: 4016876 (1977-04-01), Martin et al.
patent: 4056098 (1977-11-01), Michel et al.

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