Electric sequential combination mechanism

Claim 1

AN ELECTRIC SEQUENTIAL COMBINATION MECHANISM FOR AN OPERATED MEMBER HAVING A FIRST AND A SECOND POSITION, SUCH AS OPEN AND CLOSED POSITIONS OF A LOCK BOLT COMPRISING POWER LINES; AN OPERATED MEMBER; AND MEANS TO ACTUATE THE OPERATED MEMBER TO ITS SECOND POSITION; A PLURALITY OF SWITCH ACTUATORS; SWITCH MEANS OPERATIVELY CONNECTED WITH EACH SWITCH ACTUATOR INCLUDING A NORMALLY CLOSED FIRST CONTROL SWITCH, AND A NORMALLY OPEN SECOND CONTROL SWITCH FOR AT LEAST SOME OF THE ACTUATORS, THE FIRST CONTROL SWITCHES BEING CONNECTED IN SERIES, THE SECOND CONTROL SWITCHES EACH HAVING AN INPUT CONTACT CONNECTED WITH A POWER LINE AND AN OUTPUT CONTACT; RELAY MEANS INCLUDING AT LEAST A FIRST RELAY, A SECOND RELAY AND A LAST RELAY, EACH RELAY INCLUDING A COIL AND AN ARMATURE; A FIRST CIRCUIT CONNECTED ACROSS THE POWER LINES INCLUDING IN SERIES THE FIRST CONTROL SWITCHES, AND THE FIRST RELAY COIL; SHUNT SWITCH MEANS INCLUDING AT LEAST A FIRST SHUNT SWITCH AND A LAST SHUNT SWITCH, A SHUNT SWITCH BEING OPERATIVELY CONNECTED WITH THE ARMATURE OF EACH RELAY EXCLUSIVE OF THE LAST RELAY, THE FIRST SHUNT SWITCH BEING NORMALLY HELD IN CLOSED POSITION, BY THE NORMALLY ENERGIZED FIRST CIRCUIT RELAY COIL, EACH SHUNT SWITCH BEING CONNECTED ACROSS A FIRST CONTROL SWITCH; A SECOND CIRCUIT CONNECTED ACROSS THE POWER LINES INCLUDING IN SERIES A SECOND CONTROL SWITCH, A NORMALLY CLOSED FIRST SEQUENTIAL SWITCH, A FIRST POSITION LIMIT SWITCH, AND THE SECOND RELAY COIL, AND A SECOND RELAY HOLDING SWITCH CONNECTED WITH THE POWER LINE AND A CONNECTION FROM THIS SWITCH TO THE SECOND RELAY SWITCH PROVIDING A HOLDING CIRCUIT FOR THE SECOND RELAY, THE SECOND CONTROL SWITCH BEING THAT ONE WHICH IS OPERATIVELY CONNECTED WITH THE FIRST CONTROL SWITCH HAVING THE FIRST SHUNT SWITCH ACROSS THE SAME, THE SECOND RELAY SWITCH BEING OPERATIVELY CONNECTED WITH THE ARMATURE OF THE FIRST RELAY AND THE SECOND CIRCUIT HOLDING SWITCH BEING OPERATIVELY CONNECTED WITH THE ARMATURE FOR THE SECOND RELAY; A LAST CIRCUIT CONNECTED ACROSS THE POWER LINES INCLUDING IN SERIES A SECOND CONTROL SWITCH, A LAST SEQUENTIAL SWITCH, A NORMALLY CLOSED SAFETY SWITCH, AND THE LAST RELAY COIL, AND A LAST RELAY HOLDING CIRCUIT INCLUDING A LAST RELAY HOLDING SWITCH CONNECTED WITH THE POWER LINE AND WITH THE LAST SEQUENTIAL SWITCH, THE SECOND CONTROL SWITCH BEING THAT ONE WHICH IS OPERATIVELY CONNECTED WITH THE FIRST CONTROL SWITCH HAVING THE LAST SHUNT SWITCH, AND THE LAST RELAY HOLDING SWITCH BEING OPERATIVELY CONNECTED WITH THE ARMATURE OF THE LAST RELAY; MEANS OPERATIVELY CONNECTING EACH SEQUENTIAL SWITCH WITH THE ARMATURE OF A PRECEDING RELAY TO BE CLOSED UPON THE RELAY BEING ENERGIZED; MOTOR MEANS; THE OPERATED MEMBER BEING OPERATIVELY CONNECTED WITH THE MOTOR MEANS TO MOVE THE OPERATING MEMBER AT LEAST TO ITS FIRST POSITION, ONE LIMIT SWITCH BEING OPERATIVELY CONNECTED WITH THE OPERATED MEMBER TO BE OPENED WHEN THE MEMBER IS IN ITS FIRST POSITION; AND THE OTHER LIMIT SWITCH BEING OPERATIVELY CONNECTED WITH THE OPERATING MEMBER TO BE OPENED IN THE SECOND POSITION OF THE OPERATING MEMBER; AND A MOTOR CIRCUIT CONNECTED BETWEEN THE POWER LINES INCLUDING A MOTOR SWITCH AND THE MOTOR, AND THE MOTOR SWITCH BEING OPERATIVELY CONNECTED WITH THE ARMATURE OF THE LAST RELAY AND CLOSED THEREBY.