Control mechanism for rotary compressors

Claim 1

IN A ROTARY COMPRESSOR HAVING A SUCTION LINE AND A DISCHARGE LINE, THE IMPROVEMENT COMPRISING A CONTROL MECHANISM INCLUDING A RESTRICTIVE ORIFICE ADAPTED TO BE DISPOSED IN SAID DISCHARGE LINE, FIRST PRESSURE DIFFERENTIAL SENSING MEANS ADAPTED TO BE CONNECTED TO SAID SUCTION LINE AND SAID DISCHARGE LINE TO SENSE THE DIFFERENCE IN PRESSURE THEREBETWEEN, SECOND DIFFERENTIAL PRESSURE SENSING MEANS ADAPTED TO BE CONNECTED TO SAID DISCHARGE LINE ON EACH SIDE OF SAID RESTRICTOR ORIFICE TO SENSE THE DIFFERENCE IN PRESSURE ACROSS SAID ORIFICE, AND CONTROL MEANS CONNECTED TO SAID FIRST AND SECOND PRESSURE DIFFERENTIAL SENSING MEANS AND MOVABLE IN ACCORDANCE WITH A RATIO OF THE DIFFERENCE OF SAID FIRST AND SECOND PRESSURE SENSING MEANS AND ADAPTED TO BE CONNECTED TO SAID COMPRESSOR TO CONTROL THE OUTPUT THEREOF, SAID CONTROL MEANS INCLUDING FIRST AND SECOND SENSING FINGERS DISPOSED IN ALIGNMENT WITH SAID FIRST AND SECOND DIAPHRAGMS AND DISPLACEABLE THEREBY, SAID MOVABLE MEMBER COMPRISING A LEVER CONNECTING EACH OF SAID FIRST AND SECOND SENSING FINGERS.