Automobile swerve alarm system

Claim 1

IN AN AUTOMOBILE DANGER ALARM SYSTEM: (A) A PAIR OF GENERALLY TUBULAR SUPPORT MEMBERS ON AN AUTOMOBILE SO THAT ONE SUCH TUBULAR SUPPORT IS POINTED IN A GENERAL DIERECTION FORWARDLY TOWARD THE PAVEMENT AND TO THE LEFT OF THE AUTOMOBILE, AND THE OTHER TUBULAR SUPPORT AT AN ANGLE THERETO BUT TOWARD A CENTER PORTION OF THE PAVEMENT, (B) A LIGHT-SENSITIVE CELL SUPPORTED IN EACH SUCH TUBE IN A POSITION NOT TO RECEIVE DIRECT LIGHT FROM PASSING VEHICLES, (C) AN ALARM DEVICE, (D) CIRCUIT MEANS FOR ACTUATING SAID ALARM DEVICE WHEN THE LIGHT REFLECTED FROM THE PAVEMENT TO SAID CELLS HAS A PREDETERMINED DIFFERENTIAL VALUE, (E) A LIGHT SOURCE, (F) MEANS FOR SUPPORTING THE LIGHT SOURCE ON THE VEHICLE TO REFLECT LIGHT FROM SAID SOURCE TO AND FROM THE PAVEMENT IN SUBSTANTIALLY EQUAL INTENSITY TO EACH LIGHT-SENSITIVE CELL, (G) WHEATSTONE TYPE BRIDGE WITH TWO LEGS, EACH OF WHICH INCLUDES ONE OF SAID CELLS, (H) ADUSTABLE POTENTIOMETER MEANS FOR BALANCING SAID BRIDGE CIRCUIT WITH A PREDETERMINED RESISTANCE VALUE FOR EACH CELL, (I) AN AMPLIFYING CIRCUIT INCLUDING A POWER SOURCE, SAID BRIDGE CIRCUIT AND A RELAY COIL, SO THAT IMBALANCE OF SAID BRIDGE CIRCUIT WILL CAUSE A CURRENT TO FLOW, AND SAID CURRENT TO BE AMPLIFIED TO ENERGIZE SAID RELAY COIL, (J) SIGNAL MEANS RESPONSIVE TO ENERGIZATION OF SAID RELAY COIL AND ACTUATION OF THE RELAY ARMATURE TO SIGNAL TO THE AUTOMOBILE DRIVER WHEN ONE OF SAID CELLS IS RECEIVING RADIATIONS FROM A ROAD DIVIDING MARKER.