Motor driven rotary selector valve

Claim 1

INDEXING MECHANISM FOR ACTUATING A ROTARY SELECTOR VALVE, HAVING A VALVE HOUSING, SAID INDEXING MECHANISM COMPRISING, IN COMBINATION: AN INDEXING DISC HAVING A PERIPHERY COMPRISING A SUCCESSION OF CIRCUMFERENTIALLY SPACED SEGMENTAL CIRCULAR RAISED CAM FACES AND A CORRESPONDING SERIES OF CONCAVE DETENTS BETWEEN SAID RAISED CAM FACES; SAID DETENTS BEING POSITIONED TO CORRESPOND TO A SERIES OF LATERAL PORTS IN SAID VALVE HOUSING; A CAM FOLLOWER INCLUDING A ROLLER, MEANS MOUNTING SAID ROLLER FOR RADIAL MOVEMENTS IN CONTACT WITH SAID DISC PERIPHERY, AND A SWITCH ACTUATOR FOLLOWING SAID RADIAL ROLLER MOVEMENT, SAID ROLLER YIELDING ENGAGING SAID INDEXING DISC PERIPHERY; MEANS INCLUDING A REVERSIBLE ELECTRIC ACTUATOR MOTOR FOR SIMULTANEOUSLY ROTATING SAID VALVE AND INDEXING DISC IN UNISON; CONTROL MEANS FOR INITIATING A STAGE OF OPERATION OF SAID MOTOR WHEREIN SAID DISC IS ADVANCED FROM A POSITION WHERE SAID FOLLOWER HAS BEEN IN ENGAGEMENT WITH ONE OF SAID DETENTS TO A POSITION WHERE IT ENGAGES A SUCCEEDING DETENT, AND MEANS RESPONSIVE TO RADIAL MOVEMENT OF SAID FOLLOWER TO SAID LAST MENTIONED POSITION, FOR TERMINATING SAID STAGE OF OPERATION, SAID RESPONSIVE MEANS COMPRISING A LIMIT SWITCH ADAPTED TO MAINTAIN AN ENERGIZING CIRCUIT TO SAID MOTOR WHILE SAID ROLLER RIDES AGAINST ONE OF SAID RAISED CAM FACES AND TO INTERRUPT SAID CIRCUIT WHEN SAID ROLLER DROPS INTO ONE OF SAID DETENTS; SAID CONTROL MEANS INCLUDING A CONTROL CIRCUIT INTERCONNECTING SAID LIMIT SWITCH AND SAID INITIATING CONTROL MEANS ADAPTED FROM THE BEGINNING OF A COMPLETE CYCLE OF OPERATION TO MAIN RECURRING FORWARD INDEXING MOVEMENTS OF SAID INDEXING DISC AND ROTOR THROUGH A NUMBER OF STAGES CORRESPONDING TO THE NUMBER OF SAID LATERAL PORTS, AND FURTHER INCLUDING REVERSING CONTROL MEANS, RESPONSIVE TO ARRIVAL OF SAID INDEXING DISC AND VALVE AT A FINAL POSITION OF FORWARD INDEXING MOVEMENT, TO SET SAID CONTROL CIRCUIT FOR REVERSE OPERATION OF SAID MOTOR FROM SAID FINAL POSITION BACK TO THE POSITION OF STARTING SAID FULL CYCLE OF OPERATION, IN AN UNINTERRUPTED RESETTING MOVEMENT,