Vehicle direction indicator systems

Claim 1

A VEHICLE DIRECTION INDICATOR SYSTEM COMPRISING IN COMBINATION FIRST AND SECOND DIRECTION INDICATING LAMPS AT OPPOSITE SIDES OF THE VEHICLE, A TERMINAL FOR CONNECTION OF A D.C. SOURCE, A MANUALLY OPERABLE THREE POSITION SWITCH HAVING A MOVABLE CONTACT PIECE AND FIRST AND SECONE FIXED CONTACT PIECES, A FLASHER UNIT CONNECTED BETWEEN SAID TERMINAL AND THE MOVABLE CONTACT PIECE, FIRST AND SECOND RESISTORS THROUGH WHICH THE FIRST AND SECOND FIXED CONTACT PIECES ARE CONNECTED TO THE FIRST AND SECOND LAMPS RESPECTIVELY, A THIRD FIXED CONTACT PIECE, A THIRD RESISTOR CONNECTED BETWEEN THE SECOND AND THIRD CONTACT RESISTOR CONNECTED BETWEEN THE SECOND AND THIRD CONTACT PIECES, A FIRST SWITCH MOVABLE BETWEEN A FIRST POSITION IN IN WHICH IT INTERCONNECTS THE FIRST AND THIRD CONTCAT PIECES, A SECOND SWITCH MOVABLE BETWEEN A FIRST POSITION IN WHICH IT BRIDGES THE SECOND RESISTOR AND A SECOND NEUTRAL POSITION, AND MEANS COUPLING THE FIRST AND SECOND SWITCHES TOGETHER FOR SIMULTANEOUS OPERATION, OPERATION OF SAID THREE POSITION SWITCH WHEN THE FIRST AND SECOND SWITCHES ARE IN THEIR SECOND POSITIONS PERMITTING CURRENT RESISTOR TO ONE LAMP THROUGH EITHER THE FIRST OR SECOND RESISTOR TO ILLUMINATE THE LAMP, CURRENT ALSO FLOWING TO THE OTHER LAMP THROUHG THE THIRD RESISTOR AND EITHER THE SECCOND OR THE FIRST RESISTOR IN SERIES, THE RESISTANCE OF THE THIRD RESISTOR BEING SUCH THAT CURRENT FLOWING TO SAID LAMP IS INSUFFICIENT TO ILLUMINATE IT BUT SUFFICIENT TO MAINTAIN THE FREQUENCY OF OPERATION OF THE FLASHER UNIT SUBSTANTIALLY THE SAME AS WHEN THE FIRST AND SECOND RESISTORS ARE IN THEIR FIRST POSITION.