Electric circuit for dimming vehicle lights

Claim 1

AN ELECTRICAL CIRCUIT DEVICE FOR USE IN VEHICLES AND THE LIKE, COMPRISING, IN COMBINATION: A SOURCE OF ELECTRICAL ENERGY; A HIGH FILAMENT AND A LOW FILAMENT; CIRCUIT MEANS, INCLUDING MANUALLY ACTUABLE SWITCH MEANS, FOR CONNECTING SAID FILAMENTS WITH SAID ENERGY SOURCE AND INCLUDING FILAMENT CONTROL MEANS INCLUDING A LIGHT SENSITIVE MEANS FOR CONTROLLING SAID CIRCUIT INTO A CONDITION IN WHICH SAID HIGH FILAMENT IS DISCONNECTED FROM SAID SOURCE AND SAID LOW FILAMENT IS CONNECTED TO SAID SOURCE WHEN LIGHT OF A PREDETERMINED INTENSITY REACHES SAID LIGHT SENSITIVE MEANS AND FOR RETAINING SAID CIRCUIT IN THIS CONDITION EVER AFTER SAID LIGHT SENSITIVE MEANS CEASES TO DETECT LIGHT OF THE PREDETERMINED INTENSITY, SAID FILAMENT CONTROL MEANS COMPRISING FIRST MEANS, INCLUDING AN ELECTROMAGNET, FOR HOLDING SAID HIGH FILAMENT CONNECTED TO SAID SOURCE UPON ACTUATION OF SAID MANUALLY ACTUATABLE SWITCH MEANS UNTIL DISCONNECTION BY SAID LIGHT SENSITIVE MEANS, A TWO POSITION SWITCH FOR CONNECTING SAID LOW FILAMENT WITH SAID SOURCE IN ONE POSITION AND FOR CONNECTION SAID HIGH FILAMENT WITH SAID SOURCE WHEN IN THE OTHER POSITION, AND A DEVICE FOR BIASSING SAID TWO POSITION SWITCH TOWARD SAID ONE POSITION, SAID ELECTROMAGNET BEING CAPABLE OF HOLDING THE TWO POSITION SWITCH IN SAID OTHER POSITION BY MAGNETIC ATTRACTION.