Control system for transferring a load from one power source to a second power source

Claim 1

A CONTROL SYSTEM THAT CAN NORMALLY CONNECT A LOAD TO A FIRST A.C. POWER SOURCE WHILE ISOLATING THAT LOAD FROM A SECOND A.C. POWER SOURCE AND THAT CAN AUTOMATICALLY AND PROMPTLY TRANSFER SAID LOAD FROM SAID FIRST A.C. POWER SOURCE TO SAID SECOND A.C. POWER SOURCE AND CAN ISOLATE SAID LOAD FROM SAID FIRST A.C. POWER SOURCE WHILE SUBSTANTIALLY CONTINUOUSLY SUPPLYING POWER TO SAID LOAD AND THAT CAN SUBSEQUENTLY AUTOMATICALLY AND PROMPTLY TRANSFER SAID LOAD FROM SAID SECOND A.C. POWER SOURCE TO SAID FIRST A.C. POWER SOURCE AND CAN ISOLATE SAID LOAD FROM SAID SECOND A.C. POWER SOURCE WHILE SUBSTANTIALLY CONTINUOUSLY SUPPLING POWER TO SAID LOAD AND THAT COMPRISES A CONTROLLED RECTIFIER THAT WILL NORMALLY BE RENDERED CONDUCTIVE TO ENABLE IT TO CONNECT SAID LOAD TO SAID FIRST A.C. POWER SOURCE BUT THAT CAN BE SELECTIVELY RENDERED NON-CONDUCTIVE TO ISOLATE SAID LOAD FROM SAID FIRST A.C. POWER SOURCE, A SECOND CONTROLLED RECTIFIER THAT WILL NORMALLY BE RENDERED NON-CONDUCTIVE TO ENABLE IT TO ISOLATE SAID LOAD FROM SAID SECOND A.C. POWER SOURCE BUT THAT CAN BE SELECTIVELY RENDERED CONDUCTIVE TO CONNECT SAID LOAD TO SAID SECOND A.C. POWER SOURCE, A CAPACITOR THAT IS CONNECTED IN GENERALLY PARALLEL RELATION WITH SAID LOAD AND IN SERIES WITH FIRST SAID CONTROLLED RECTIFIER, WHENEVER THE FIRST SAID CONTROLLED RECTIFIER IS CONDUCTIVE AND THAT IS CONNECTED IN GENERALLY PARALLEL RELATION WITH SAID LOAD AND IN SERIES WITH SAID SECOND CONTROLLED RECTIFIER WHENEVER SAID SECOND CONTROLLED RECTIFIER IS CONDUC-