Electric lamp with a single device for focus-control and switch-

Details Electric lamp with a single device for focus-control and switch- Electric lamp with a single device for focus-control and switch-

1982-09-30

1984-01-31

Lechert, Jr., Stephen J.

Illumination

Self powered lamp

With movable focusing element

200 60, 362103, 362105, 362204, 362205, 362206, 362277, F21L 700

Patent

active

044293518

ABSTRACT:
An electric lamp with a parabolic reflector in a threaded collar, provided with a device for adjusting the focus by relative displacement between the bulb and the reflector which occurs when turning the collar on its threads between first and second adjusting positions. The device furthermore controls a switch housed within the casing for the device. The device is particularly applicable as an electric headlamp for mountain-climbers or spelunkers.

REFERENCES:
patent: 4261026 (1981-04-01), Bolha
patent: 4329740 (1982-05-01), Colvin

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