Pneumatically timed electric switch arrangement

Claim 1

A PNEUMATICALLY TIMED ELECTRIC SWITCH ARRANGEMENT COMPRISING: A FIRST MEMBER HAVING A CENTRAL APERTURE AT ONE END AND PROVIDING A SWITCH HOUSING INCLUDING A LOWER CASING WALL STRUCTURE; A CAP MEMBER SECURED TO THE OTHER END OF THE FIRST MEMBER AND HAVING A DOWNWARDLY FACING RECESS; PROJECTIONS ON THE UPPER SURFACE OF THE LOWER CASING WALL STRUCTURE ON THE UPPER SURFACE OF THE LOWER CASING A DIAPHRAGM APERTURED TO BE ANCHORED AT ITS PERIPHERY, ON SAID PROJECTIONS AND RETAINED BETWEEN SAID MEMBERS, TO DEFINE WITH THE CAP MEMBER RECESS AN AIR CHAMBER AND FORMING A FLEXIBLE CHAMBER WALL; AN ANNULAR SEAT FORMATION ON THE INNER FACE OF THE CAP LYING WITHIN THE LOCATION OF SAID PROJECTIONS; MEANS SUPPORTING THE PERIPHERY OF THE DIAPHRAGM FROM BELOW BENEATH SAID SEAT, SAID DIAPHRAGM BEING SUPPORTED WITH A NORMALLY SLIGHT CLEARANCE RELATIVE TO SAID SEAT; A RETURN PRESSURE PAD BEARING ON BUT INDEPENDENT OF THE CENTRAL TOP SURFACE OF SAID DIAPHRAGM AND A CENTRALLY LOCATED DIAPHRAGM RETURN SPRING INTERPOSED BETWEEN THE CAP AND SAID PAD; A CENTRALLY APERTURED GUIDE PLATE SUPPORTED BY THE LOWER CASING IN DOWNWARDLY SPACED RELATION FROM SAID SUPPORT MEANS; AN ACTUATOR PRESSURE PAD IN A LOWER CHAMBER BEARING ON BUT INDEPENDENT OF THE LOWER CENTER SURFACE OF SAID DIAPHRAGM AND HAVING A STEM EXTENDING THROUGH THE APERTURE OF SAID GUIDE PLATE; A COMPRESSION SPRING INTERPOSED BETWEEN THE LAST SAID PRESSURE PAD AND GUIDE PLATE; AN ACTUATING PLUNGER RECIPROCABLY SUPPORTED AND GUIDED IN THE SAID CENTRAL APERTURE OF THE FIRST MEMBER AND HAVING A STOP FORMATION COOPERATING WITH THE LOWER WALL STRUCTURE TO RETAIN THE SAME THEREIN; CONNECTING MEANS FOR CONNECTING SAID PLUNGER TO SAID STEM, AND RECIPROCATING WITH THE STEM UNDER AXIAL FORCES APPLIED EXTERNALLY TO THE PLUNGER AND BY RETURN ACTION OF SAID COMPRESSION SPRING; A SWITCH INCLUDING OPPOSED FIXED CONTACT ELEMENTS SUPPORTED BY THE LOWER MEMBER, OPPOSITELY EXTENDING SWITCH BLADES HAVING INNER ENDS PIVOTALLY SEATED IN PARALLEL FORMATIONS ON THE CONNECTING MEANS; AND A SWITCH TENSION SPRING EXTENDING THROUGH A LONGITUDINAL SLOT IN THE CONNECTING MEANS AND HAVING OPPOSITE ENDS CONNECTED TO RESPECTIVE BLADES, SAID BLADES HAVING INNER ENDS SLOTTED FOR ACCOMMODATION OF SAID SPRING; AND AIR FLOW CONTROL MEANS CONTROLLING AIR FLOW THROUGH A PASSAGEWAY BETWEEN THE ATMOSPHER AND SAID AIR CHAMBER.