Headlamp levelling system

Details Headlamp levelling system Headlamp levelling system

1978-11-17

1980-04-08

Dobeck, B.

Electricity: motive power systems

Positional servo systems

With particular motor control system responsive to the...

307 10LS, 315 77, 315 82, B60Q 102

Patent

active

041974913

ABSTRACT:
A headlamp levelling system for a road vehicle, comprises an electric motor which, in use, drives a member coupled to the headlamp so as to allow the headlamp to be adjusted in a manner to vary the direction of the light beam emitted, in use, by the headlamp. The motor is connected across the terminals of an electrical supply by way of an electrical circuit including switch means and a plurality of spaced pairs of electrical contacts. The switch means has a plurality of switch positions, one for each of said pairs of contacts, and a bridging member is associated with said pairs of contacts. The contacts and the briding member undergo relative movement in response to movement of said driven member so that the bridging member bridges said pairs of contacts, in turn, in respective discrete positions of the driven member and hence of said headlamp. The electrical circuit is arranged so that when said switch means is moved from one switch position to a further switch position, current is fed from said supply to said motor to move said driven member until said bridging member bridges the pair of contacts associated with said further switch position, whereupon the supply of current to the motor is terminated.

REFERENCES:
patent: 2876384 (1959-03-01), Brown
patent: 3395323 (1968-07-01), Peters
patent: 3437895 (1969-04-01), Peters
patent: 3614574 (1971-10-01), Hodges
patent: 3856997 (1974-12-01), Kilkes
patent: 3909691 (1975-09-01), Wilson et al.
patent: 4162424 (1979-07-01), Zillaitt et al.

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