Headlight dimmer using field effect transistor

Claim 1

A CONTROL CIRCUIT FOR THE HEADLAMPS OF AN AUTOMOBILE POWERED DIRECTLY FROM THE CAR CARRIED BATTERY AND WHICH WILL AUTOMATICALLY DIM THE HIGH BEAMS AT THE APPROACH OF ONCOMING MOTOR VEHICLES AND WILL AUTOMATICALLY RETURN THE HIGH BEAMS WHEN ONCOMING MOTOR VEHICLES PASS COMPRISING A PHOTOSENSITIVE RESISTIVE ELEMENT POSITIONED IN THE AUTOMOBILE SO THAT LIGHT FROM THE HEADLAMPS OF ONCOMING MOTOR VEHICLES WILL STRIKE THE PHOTOSENSITIVE RESISTIVE ELEMENT AND DECREASE ITS RESISTANCE, AN AMPLIFYING MEANS HAVING AN INPUT STAGE WITH A FIELD EFFECT TRANSISTOR AND AN OUTPUT TERMINAL AT WHICH THE MAGNITUDE OF CURRENT FLOW WILL VARY WITH CHANGES IN THE MAGNITUDE OF CURRENT FLOW THROUGH THE FIELD EFFECT TRANSISTOR, BIASING MEANS INCLUDING SAID PHOTOSENSITIVE RESISTIVE ELEMENT CONNECTED TO THE FIELD EFFECT TRANSISTOR SO AS TO VARY THE MAGNITUDE OF CURRENT FLOW AT THE OUTPUT TERMINALS OF THE AMPLIFYING MEANS AS MOTOR VEHICLES APPROACH AND PASS, AND AN ELECTROMAGNETIC RELAY HAVING ARMATURE MEANS CONNECTED TO THE BATTERY OF THE AUTOMOBILE, FIRST CONTACT MEANS CONNECTED TO THE LOW BEAM FILAMENTS OF THE HEADLAMPS OF THE AUTOMOBILE, SECOND CONTACT MEANS CONNECTED TO THE HIGH BEAM FILAMENTS OF THE HEADLAMPS OF THE AUTOMOBILE AND AN ELECTROMAGNETIC COIL CONNECTED TO THE OUTPUT TERMINALS OF THE AMPLIFYING MEANS SO THAT THE RELAY CAN BE ENERGIZED AND DEENERGIZED BY THE CHANGES IN CURRENT FLOW AT THE OUTPUT TERMINALS OF SAID AMPLIFYING MEANS TO POSITION THE ARMATURE MEANS EITHER AGAINST THE FIRST CONTACT MEANS OR AGAINST THE SECOND CONTACT MEANS.