Safety circuit for compressor drive

Claim 1

IN A SAFETY CONTROL CIRCUIT FOR OPERATIVELY CONNECTING AND DISCONNECTING A COMPRESSOR TO A POWER SOURCE, AN ON-OFF SWITCH TO SELECTIVELY CONDITION THE COMPRESSOR FOR OPERATION, A TEMPERATURE RESPONSIVE SWITCH MEANS IN SERIES WITH THE ON-OFF SWITCH TO RESTRICT COMPRESSOR OPERATION TO PRESELECTED TEMPERATURE CONDITIONS, ELECTRORESPONSIVE RESET MEANS HAVING CONTACT MEANS CONNECTED IN SERIES WITH SAID ON-OFF SWITCH AND SAID TEMPERATURE RESPONSIVE SWITCH MEANS, A DUAL PRESSURE SWITCH MEANS HAVING A FIRST SET OF CONTACTS ADAPTED TO BE COUPLED TO THE HIGH PRESSURE SIDE OF THE COMPRESSOR AND A SECOND SET OF CONTACTS ADAPTED TO BE COUPLED TO THE LOW PRESSURE SIDE OF THE COMPRESSOR AND HAVING SAID FIRST AND SECOND SET OF CONTACTS CONNECTED IN CIRCUIT WITH THE RESET MEANS FOR SIMULTANEOUS AND INDIVIDUAL CONTROL OF THE RESET MEANS, AND LATCH CIRCUIT MEANS CONNECTED TO SAID ELECTRORESPONSIVE RESET MEANS TO MAINTAIN ENERGIZATION INDEPENDENTLY OF THE DUAL PRESSURE SWITCH AS A RESULT OF THE INITIAL ENERGIZATION OF THE ELECTRORESPONSIVE RESET MEANS BY OPERATION OF SAID DUAL PRESSURE SWITCH MEANS.