Automatic control system for headlights of motor vehicles comprising a supplementarylight with filter

• US 3,188,519 A
• Filed: 10/13/1959
• Issued: 06/08/1965
• Est. Priority Date: 11/11/1958
• Status: Expired due to Term

• Current Assignee: Bunsaku Shiomi
• Original Assignee: Bunsaku Shiomi
• Inventors: BUNSAKU SHIOMI
• Application Number:
  US03/846,149
• Time in Patent Office: 2,065 Days
• US Class Current: 315/83
• 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 2300/052 Switching delay, i.e. the beam is not switched or changed instantaneously upon occurrence of a condition change
• CPC Class Codes: B60Q 2300/42 oncoming vehicle

Claims

1. IN AN AUTOMATIC CONTROL SYSTEM FOR HEADLIGHTS OF MOTOIR VEHICLES HAVING AT LEAST ONE HIGH BEAM HEADLIGHT MEANS AND A LOW BEAM HEADLIGHT MEANS, AT LEAST ONE SUPPLEMENTARY LAMP DEVICE, A PHOTOSENSITIVE DEVICE SENSITIVE TO VISIBLE AND INFRA-RED RADIATIONS, AND SWITCHING MEANS CONNECTED BETWEEN SAID HIGH BEAM HEADLIGHT MEANS, LOW BEAM HEADLIGHT MEANS AND SUPPLEMENTARY LAMP DEVICE AND SAID PHOTOSENSITIVE DEVICE AND CONTROLLED BY THE OUTPUT OF SAID PHOTOSENSITIVE DEVICE FOR SWITCHING OFF SAID HIGH BEAM HEADLIGHT MEANS WHILE SWITCHING ON SAID LOW BEAM HEADLIGHT MEANS AND SAID SUPPLEMENTARY LAMP DEVICE, THAT IMPROVEMENT IN WHICH SAID SUPPLEMENTARY LAMP DEVICE CONSISTS OF AN INCANDESCENT LAMP, A REFLECTOR IN WHICH SAID LAMP IS POSITIONED AND HAVING AN OPENING THROUGH WHICH DIRECT AND REFLECTED LIGHT FROM SAID LAMP PASSES, A FILTER OVER SAID OPENING THROUGH WHICH ALL OF THE LIGHT FROM THE FILAMENT OF SAID LAMP IS PROJECTED, SAID FILTER HAVING A LIGHT IN THE BLUE-GREEN PORTION OF THE VISIBLE LIGHT SPECTRUM AND INFRA-RED LIGHT.