Multi-speed electric motor drive

Claim 1

A MULTI-SPEED ELECTRIC MOTOR HAVING MAIN WINDINGS,, FORMING NORMAL RUNNING POLES AND STARTING WINDINGS FORMING ADDITIONAL STARTING POLES; POWER INPUT LINES TO SAID MOTOR; RELAY MEANS INCLUDING AT LEAST ONE COIL MEANS AND FIRST AND SECOND NORMALLY OPEN CONTACCTS AND FIRST AND SECOND NORMALLY CLOSED CONTACTS ALL CONTROLLED BY SAID COIL MEANS; A NORMAL RUNNING CIRCUIT INCLUDING THE FIRST NORMALLY CLOSED CONTACTS AND SAID MAIN WINDINGS CONNECTED ACROSS SAID INPUT LINES; A STARTING CIRCUIT INCLUDING THE SECOND NORMALLY CLOSED CONTACTS, A PHASE DISPLACING MEANS, A FIRST NORMALLY CLOSED CONTACTS, A PHASE DISPLACING MEANS, A FIRST NORAMALLY CLOSED CENTRIFUGAL SWITCH DRIVEN ACROSS SAID INPUT LINES WITH SAID FIRST CENTRIFUGAL SWITCH CONTROLLING THE ENERGIZING OF SAID STARTING CIRCUIT; A FIRST SWITCH INN ONE OF SAID INPUT LINEES ADAPTED TO MAINTAIN ITSELF IN A CLOSED POSITION; A SLOW SPEED RUNNING CIRCUIT INCLUDING FIRST NORMALLY OPEN CONTACTS AND SAID MAIN AND STARTING WINDINGS ALL CONNECTED WITH SAID STARTING AND MAINN WINDINGS IN SERIES ACROSS SAID INPUT LINES; A NORMALLY CONTROLLED NORMALLY OPEN SECOND SWITCH REQUIRING DELIBERATE MAINTAINED OPERATION FOR CCLOSING THEREOF; A SHUNT CIRCUIT AROUND SAID FIRST SWITCH INCLUDING SAID SECOND SWITCH AND A SECOND NORMALLY CLOSED CENTRIFUGAL SWITCH DRIVEN BY SAID MOTOR, SAID SECOND SWITCH BEING CONNECTED TO THE ONE INPUT LINE AHEAD OF SAID FIRST SWITCH; AN ENERGIZING CIRCUIT FOR SAID RELAY MEANS INCLUDING SAID COIL MEANS, A NORMALLY OPEN CENTRIFUGAL SWITCH DRIVEN BY SAIID MOTOR AND ARRANGED TO CLOSE AFTER SAID MOTOR HAS ATTAINED A SPEED AT WHICH SAID FIRST NORMMALLY CLOSED CENTRIFUGAL SWITH IS OPENED, AND CONNECTIONS PLACING SAID RELAY COIL MEANS IN SERIES CIRCUIT WITH SAID NORMMALLY OPEN CENTRIFUGAL SWITCH AND WITH SAID SECOND SWITCH ACROSS SAIDD INNPUTE LINE; AND A HOLDINNG CIRCUIT FOR SAID RELAY COIL MEANS CONPRISING THE SECOND NORMALLY OPEN CONTACTS CONNECTED IN SHUNT ACROSS SAID NORMALLY OPEN CENTRIFUGAL SWITCH TO MAINTAIN ENERGIZATION OF SAID RELAY COIL MEANS UPON SLOWING OF SAID MOTOR TO SUCH A DEGREE THAT SAID NORMMALLY OPEN CENTRIFUGAL SWITCH IS UNABLE TO MAINTAIN SAID RELAY ENERGIZING CIRCUIT.