Motor vehicle headlamp system

• US 3,999,058 A
• Filed: 06/25/1975
• Issued: 12/21/1976
• Est. Priority Date: 07/03/1974
• Status: Expired due to Term

• Current Assignee: Cibie Projecteurs
• Original Assignee: Cibie Projecteurs
• Inventors: Puyplat, Olivier
• Primary Examiner(s): Tomsky, Stephen J.
• Application Number:
  US05/595,009
• Time in Patent Office: 545 Days
• Field of Search: 240/62 R, 240/62 B, 240/62.4, 240/61.2, 240/61.6, 240/61.9, 240/8.25, 240/7.1 A
• US Class Current: 362/386
• CPC Class Codes: B60Q 1/076 by electrical means including means to transmit the movements, e.g. shafts or joints
• CPC Class Codes: B60Q 1/1415 Dimming circuits

Abstract

A motor vehicle headlamp system has an adjusting mechanism which causes the dipped beam briefly to be raised and deflected sideways, to improve vision, when the main beam is extinguished.

Claims

1. A motor vehicle headlight system comprising:

a. main light beam producing means and dipped light beam producing means,

b. said dipped light beam producing means including a headlight having a normal position and mounted for pivotal movement about a non-vertical axis,

c. electrical drive means for pivoting said headlight out of its normal position to slightly raise the dipped light beam emanating therefrom,

d. means for simultaneously extinguishing said main light beam producing means and turning on said dipped light beam producing means,

e. means responsive to operation of said means (d) for providing an electrical signal of limited duration to said drive means to energize the latter and pivot said headlight out of its normal position, and

f. means automatically returning said headlight to its normal position after operation of said drive means.

2. A motor vehicle headlight system as defined in claim 1 wherein said returning means (f) comprises resilient means which is stressed when said headlight is pivoted out of its normal position.

3. A motor vehicle headlight system according to claim 1 including means for limiting the rate of return movement of said headlight from its raised position to its normal position.

4. A motor vehicle headlight system according to claim 3, in which said means for limiting the rate or return movement of said headlight comprises a damping device.

5. A motor vehicle headlight system according to claim 1, in which said drive means includes an electromagnet whose energization is controlled by said electrical signal.

6. A motor vehicle headlight system according to claim 5 including a damping device adapted to dampen the return movement of the headlight back to its normal position.

7. A motor vehicle headlight system according to claim 1, in which said drive means includes an electric motor, cam means arranged to be rotated by said motor, and an abutment element connected to said headlight engaging said cam means.

8. A motor vehicle headlight system according to claim 7, in which said cam means includes a first portion shaped to quickly move the headlamp to its raised position upon energization of the motor, and a second portion shaped to limit the rate of return movement of the headlamp back to its normal position.

9. A motor vehicle headlight system according to claim 8, in which said means (e) includes a relay for controlling energization of the electric motor in response to said electrical signal, and a limit switch for shutting off the motor energization once the headlight returns to its normal position.

10. A motor vehicle headlight system according to claim 1, in which said means (e) includes a monostable multivibrator brought to the 1 state by operation of said means (d), a resistance-capacitance circuit to restore the monostable multivibrator to the 0 state after a delay, and a relay responsive to the operation of the monostable multivibrator to control operation of the drive means.

11. A motor vehicle headlight system according to claim 1, in which the drive means produce a movement of the headlight to cause an approximately 0.01 radian reduction of the inclination of its optical axis relative to the horizontal.