Key card dispatched conveyor systems

Claim 1

IN A CONVEYOR SYSTEM WHEREIN CARRIERS ARE CONVEYABLE ON A TRACKWAY FOR TRANSPORTING WORK TO BE ACTED UPON AT SELECTED POINTS THEREALONG, CONTROL MEANS BEING PROVIDED AT EACH POINT TO EFFECT AN ACTION WITH RESPECT TO CARRIERS SELECTING THE POINT; A REPLACEABLE KEY CARD BORNE BY EACH CARRIER TO INSTRUCT SAID CARRIER TO TAKE PREDETERMINED ACTIONS RELATIVE TO SELECTED POINTS ALONG SAID TRACKWAY, A STATIONARY RECEIVER ADJACENT EACH POINT TO ENGAGE THE KEY CARD ON THE CARRIER ARRIVING THEREAT, SAID RECEIVER PRODUCING A SIGNAL ONLY WHEN THE INCOMING CARD IS PROPERLY CODED RELATIVE THERETO, SAID SIGNAL BEING APPLIED TO SAID CONTROL MEANS TO EFFECT THE DESCRIBED ACTION, EACH KEY CARD HAVING A SERIES OF BINARY CODE POSITIONS THEREON WHEREIN A PARTICULAR CODE COMBINATION IS DEFINED BY ELEMENTS PROJECTING FROM SELECTED POSITIONS IN SAID SERIES, SAID RECEIVER HAVING A LIKE SERIES OF SWITCHES HAVING ACTUATOR MEMBERS ALIGNED WITH SAID KEY POSITIONS TO ENGAGE SAID ELEMENTS, EACH OF SAID SWITCHES BEING IN A NORMALLY OPEN OR CLOSED STATE AND BEINGMOMENTARILY REVERSED IN STATE WHEN ACTUATED, AT LEAST ONE SWITCH IN THE SERIES BEING NORMALLY OPEN WHILE ANOTHER SWITCH IN SAID SERIES IS NORMALLY CLOSED, SAID SWITCHES BEING SO INTERCONNECTED IN A BINARY CODE NETWORK WHEREBY WHEN SELECTED SWITCHES ARE ACTUATED BY KEY CARDS HAVING OPERATIVE CODES, THE RESULTANT CONNECTIONS COMPLETE A CONDUCTIVE PATH TO PRODUCE SAID SIGNAL.