Patent ID: 7034700

Claim:
An electronic pressure switch comprising: a) a pressure transducer for providing an output voltage proportional to the magnitude of applied pressure; b) comparison means responsive to said output voltage for providing an output comparator signal when said voltage exhibits a predetermined value; c) a bistable device having a first and a second output and having an input responsive to said output comparator signal to switch from a first state at said first output to a second state and to switch at said second output from a second state to a first state during the presence of said comparator signal; d) a first source of operating potential adapted to be coupled to said bistable device; e) gating means for providing a pulse of a fixed duration, said gating means coupled to said source of operating potential to provide a gated potential adapted to be applied to said pressure transducer and said comparison means to enable said pressure transducer to provide said output signal during said duration and said comparator means to provide said output signal during said duration, said pulse duration being relatively small to thereby reduce power consumption of said switch due to the operation of said pressure transducer and said comparison means during said pulse duration; and f) indicator means coupled to said bistable device to provide an indication indicative of the state of each output of said bistable device.