Traffic signal controller

Claim 1

A SEMI-ACTUATED TRAFFIC CONTROLLER FOR CONTROLLING A TRAFFIC SIGNAL DISPLAY SEQUENCE TO AN INTERSECTION OF A MAIN STREET AND A CROSS STREET, AT LEAST ONE OF SAID STREETS BEING PROVIDED WITH VEHICLE DETECTOR MEANS, SAID DETECTOR MEANS BEING INTERCONNECTED WITH SAID CONTROLLER AND SAID CONTROLLER BEING PROVIDED WITH A POWER SUPPLY, SAID CONTROLLER BEING ALSO INTERCONNECTED WITH A PLURALITY OF TRAFFIC SIGNALS, SAID CONTROLLER INCLUDING A CAM UNIT ROTATABLE THROUGH A CYCLE HAVING A PLURALITY OF DISCRETE POSITIONS FOR ENERGIZING SAID SIGNALS IN A PRE-SELECTED SEQUENCE; SAID CONTROLLER INCLUDING A FIRST TIMER HAVING A NORMALLY CLOSED TIMING CIRCUIT, SAID TIMER BEING OPERABLE TO INITIATE AND CONTROL CYCLICAL MOVEMENT OF SAID CAM UNIT THROUGH SAID PLURALITY OF DISCRETE POSITIONS, SAID DETECTOR MEANS BEING OPERABLE UPON ACTUATION TO ENERGIZE SAID TIMER TO ROTATE SAID CAM UNIT THROUGH ONE OR MORE POSITIONS TO AN INITIAL POSITION WHEREIN THE PROCEED SIGNAL AND THE STOP SIGNAL FOR SAID CROSS AND MAIN STREETS, RESPECTIVELY, ARE CONNECTED TO SAID POWER SUPPLY, SAID FIRST TIMER CONTROLLING THE LENGTH OF DWELL OF SAID CAM UNIT IN SAID INITIAL POSITION AND A NEXT SUCCEEDING EXTENSION POSITION OF SAID CAM UNIT IN WHICH SAID PROCEED SIGNAL FOR SAID CROSS STREET IS ALSO CONNECTED TO SAID POWER SUPPLY, THE LENGTH OF DWELL OF SAID CAM UNIT IN SAID EXTENSION POSITION BEING EXTENDED BY SAID TIMER IN RESPONSE TO ADDITIONAL ACTUATIONS OF SAID DETECTOR MEANS ONLY WHILE SAID CAM UNIT IS IN SAID EXTENSION POSITION, THE TOTAL LENGTH OF DWELL OF SAID CAM UNIT IN SAID EXTENSION POSITION BEING LIMITED TO A PREDETERMINED MAXIMUM BY A SECOND OR MAXIMUM TIMER, SAID SECOND OR MAXIMUM TIMER BEING OPERABLE UPON ENERGIZATION IN SAID EXTENSION POSITION INDEPENDENTLY OF THE OPERATION OF SAID FIRST TIMER TO OPEN SAID NORMALLY CLOSED TIMING CIRCUIT TO PREVENT ANY ADDITIONAL EXTENSION OF THE LENGTH OF DWELL OF SAID FIRST TIMER REGARDLESS OF FURTHER ACTUATIONS OF SAID DETECTOR MEANS.