Printing apparatus control system

Claim 1

IN A PRINTING SYSTEM, A ROTATABLE PRINT WHEEL HAVING PRINTING ELEMENTS SPACED AROUND THE PERIPHERY THEREOF, A NORMALLY RETRACTED ELECTRICALLY OPERATED STOP MEMBER OPERABLE WHEN ACTIVATED TO STOP SAID PRINT WHEEL TO POSITION ONE OF THE PRINT ELEMENTS AT A PRINT LINE, A PRINTING PLATEN COOPERABLE WITH SAID PRINT WHEEL, ELECTRICALLY OPERATED MEANS CONTROLLING OPERATION OF SAID PLATEN, A PLURALITY OF KEY OPERATED SWITCH MEMBERS RESPECTIVELY REPRESENTATIVE OF THE PRINTING ELEMENTS ON SAID PRINT WHEEL AND ELECTRICALLY CONNECTED TO ACTIVATE SAID STOP MEMBER, ONLY ONE OF SAID SWITCHES BEING CLOSABLE AT A TIME, A SECOND PLURALITY OF SWITCH MEMBERS RESPECTIVELY REPRESENTATIVE OF THE PRINTING ELEMENTS ON SAID PRINT WHEEL AND CONNECTED RESPECTIVELY IN CIRCUIT WITH SAID FIRST PLURALITY OF SWITCH MEMBERS AND WITH SAID ELECTRICALLY OPERATED STOP MEMBER, A ROTARY SWITCH ACTUATOR ROTATABLE IN SYNCHRONIZED RELATION WITH SAID PRINT WHEEL TO SUCCESSIVELY ACTUATE SAID SECOND PLURALITY OF SWITCH MEMBERS, A ROTARY STORAGE SWITCH MEMBER ELECTRICALLY CONNECTED TO SAID ELECTRICALLY OPERATED MEANS AND TO SAID KEY OPERATED SWITCH MEMBERS AND ROTATABLE IN SYNCHRONIZED RELATION WITH SAID PRINT WHEEL, A PLURALITY OF CONTACT MEMBERS COOPERABLE WITH SAID ROTARY SWITCH MEMBER, SAID PLURALITY OF CONTACT MEMBERS RESPECTIVELY REPRESENTATIVE OF THE PRINTING ELEMENTS ON SAID PRINT WHEEL AND RESPECTIVELY ELECTRICALLY CONNECTED TO SAID KEY OPERATED SWITCH MEMBERS, A SWITCH MEMBER CONTROLLING THE CIRCUIT OF SAID ELECTRICALLY OPERATED STOP MEMBER AND ALSO THE CIRCUIT OF SAID ELECTRICALLY OPERATED MEANS, SAID SWITCH MEMBER NORMALLY CLOSED IN THE CIRCUIT OF SAID ELECTRICALLY OPERATED STOP MEMBER, AND A TIMING CAM OPERABLE TO CLOSE SAID SWITCH MEMBER IN THE CIRCUIT OF SAID ELECTRICALLY OPERATED MEANS FOLLOWING THE STOPPING OF SAID PRINT WHEEL BY SAID STOP MEMBER.