Automatic headlight dimming system for interrupting the connection of the voltage source to the bright filaments only

• US 3,325,680 A
• Filed: 10/01/1964
• Issued: 06/13/1967
• Est. Priority Date: 10/01/1964
• Status: Expired due to Term

• Current Assignee: Arthur W. Amacher
• Original Assignee: Arthur W. Amacher
• Inventors: Amacher, Arthur W.
• Application Number:
  US04/400,649
• Time in Patent Office: 985 Days
• US Class Current: 315/82
• CPC Class Codes: B60Q 1/1423 Automatic dimming circuits, i.e. switching between high beam and low beam due to change of ambient light or light level in road traffic
• CPC Class Codes: B60Q 2300/21 Manual control
• CPC Class Codes: B60Q 2300/42 oncoming vehicle

Claims

1. AN AUTOMATIC VEHICLE HEADLIGHT DIMMER CONTROL SYSTEM COMPRISING A VOLTAGE SOURCE, "BRIGHT" AND "DIM" HEADLIGHT FILAMENTS, A LIGHT SENSITIVE DEVICE RESPONSIVE TO CHANGES IN INCIDENT LIGHT RECEIVED THEREBY, AMPLIFIER MEANS FOR AMPLIFYING ELECTRICAL VARIATIONS IN SAID LIGHT SENSITIVE DEVICE, GATE MEANS RESPONSIVE TO THE OUTPUT OF SAID AMPLIFIER MEANS, CIRCUIT CONNECTION MEANS FOR CONNECTING SAID VOLTAGE SOURCE TO SAID "BRIGHT" AND "DIM" HEADLIGHT FILAMENTS, SOLID STATE SWITCH MEANS IN SAID CIRCUIT