초록

A practical all plastic headlamp is disclosed comprising, for the lens and reflector, an engineering plastic having a heat distortion temperature in excess of 130°C.

대표청구항 ▼

In a sealed, long life headlamp having a transparent plastic lens, a plastic reflector having a specular coating thereon, and at least one filament, the improvement comprising: a sealed inner bulb enclosing said at least one filament with lead wires therefor, sealed through said reflector, and with

In a sealed, long life headlamp having a transparent plastic lens, a plastic reflector having a specular coating thereon, and at least one filament, the improvement comprising: a sealed inner bulb enclosing said at least one filament with lead wires therefor, sealed through said reflector, and with said filament operating at a sufficient wattage and lumen output for the principal forward lighting source for a motor vehicle; said lens and reflector characterized by a heat distortion temperature in excess of 130°Celsius; and said lens and reflector being sealed together to define an enclosed volume and said filament having a wattage such that the loading of said headlamp in watts per cc. is from 0.045-0.078 inclusive.