Hermetic compressor pressure switch

Claim 1

IN A RECIPROCATING COMPRESSOR OF THE TYPE HAVING COMPRESSOR BLOCK MEANS RESILIENTLY MOUNTED WITHIN A HERMETICALLY ENCLOSED CASING AND AN ELECTRIC MOTOR DRIVEN COMPRESSOR MECHANISM IN SAID BLOCK MEANS, SAID COMCAVITY THEREIN, THE IMPROVEMENT COMPRISING A DISCHARGE GAS PRESSURE SENSING MEANS ON SAID COMPRESSOR BLOCK MEANS ENTIRELY WITHIN SAID CASING SO AS TO BE TAMPERPROOF AND DISPOSED IN SAID DISCHARGE GAS CAVITY FOR SENSING THE PRESSURE OF SAID DISCHARGE GAS AT ITS SOURCE, SAID DISCHARGE GAS PRESSURE SENSING MEANS BEING OPERATIVELY CONNECTED TO SAID ELECTRIC MOTOR DRIVING THE COMPRESSION MECHANISM OF THE COMPRESSOR FOR TERMINATING OPERATION OF THE ELECTRIC MOTOR UPON ATTAINMENT OF PREDETERMINED HIGH DISCHARGE GAS PRESSURE, SAID DISCHARGE GAS PRESSURE SENSING MEANS COMPRISES A SEALED HOUSING SECURED TO SAID COMPRESSOR BLOCK MEANS IN AN OPENING THEREIN, SAID HOUSING BEING SEALED IN SAID OPENING, SWITCH MEANS WITHIN SAID HOUSING, DIAPHRAGM MEANS RESISTANT TO ADVERSE REACTION WITH REFRIGERANT AND OIL IN THE COMPRESSOR DISPOSED WITHIN SAID HOUSING RESPONSIVE TO DISCHARGE GAS PRESSURE IN SAID DISCHARGE GAS CAVITY AND MOVABLE TO ACTUATE SAID SWITCH MEANS TO CONTROL OPERATION OF SAID ELECTRIC MOTOR.