Ambient pressure responsive switch

Claim 1

A PRESSURE RESPONSIVE SWITCH APPARATUS COMPRISING: AT LEAST ONE SWITCH ELEMENT, SAID ELEMENT INCLUDING A PAIR OF OPPOSED, SPACED APART DIAPHRAGMS, A RESILIENT BELLOWS BETWEEN SAID DIAPHRAGMS, SAID DIAPHRAGM AND BELLOWS CONSTITUTING A REFERENCE PRESSURE CHAMBER, MEANS FOR PRESSURIZING SAID REFERENCE PRESSURE CHAMBER TO A PREDETERMINED PRESSURE, A PAIR OF COACTING CONTACTS CARRIED BY SAID DIAPHRAGMS WITHIN SAID REFERENCE PRESSURE CHAMBER, SAID CONTACTS, RESPECTIVELY, BEING ELECTRICALLY CONNECTED THROUGH SAID DIAPHRAGMS INTO AN ELECTRIC CIRCUIT; A HOUSING COMPLETELY SURROUNDING SAID SWITCH ELEMENT SO AS TO FORM A SEALED PRESSURE CHAMBER THEREAROUND, SAID SWITCH ELEMENT BEING MOUNTED WITHIN AND WHOLLY SPACED FROM THE WALLS OF SAID HOUSING; COUPLING MEANS MOUNTED ON A WALL OF SAID HOUSING FOR CONNECTING SAID CONTACTS INTO THE ELECTRIC CIRCUIT; AND SENSING MEANS MOUNTED ON A WALL OF SAID HOUSING FOR ATTENUATING TURBULENT PRESSURE WITHIN SAID PRESSURE CHAMBER, SAID SENSING MEANS INCLUDING A PRESSURE TUBE EXTERIOR OF SAID HOUSING AND A PAIR OF ATTENUATOR TUBES INTERIOR OF SAID HOUSING, WHEREBY ACTUATION OF SAID SWITCH ELEMENT IS EFFECTED THROUGH SAID SENSING MEANS AS THE PRESSURE WITHIN SAID PRESSURE CHAMBER ACTS UPON SAID OPPOSED DIAPHRAGMS, AGAINST THE PRESSURE IN SAID REFERENCE PRESSURE CHAMBER, AND, WHEN THE PREDETERMINED PRESSURE WITHIN SAID REFERENCE PRESSURE CHAMBER IS ATTAINED, SAID CONTACTS TOUCH OR SEPARATE FOR EITHER CLOSING OR OPENING THE ELECTRIC CIRCUIT.