A headlamp for a power vehicle having a chassis comprises a reflector mounted on the chassis and turnable in a horizontal direction for adjusting a direction of light bundle produced by the reflector, reference markings arranged on a chassis part for marking a predetermined position of the reflector,...http://www.google.fr/patents/US5138542?utm_source=gb-gplus-shareBrevet US5138542 - Headlamp for power vehicle
