Flashlight with a backup system

Details Flashlight with a backup system Flashlight with a backup system

1987-08-04

1989-02-07

Scott, Samuel

Illumination

Self powered lamp

Having plural lamp bulbs or lamp sockets

362205, 362208, F21L 700

Patent

active

048036056

ABSTRACT:
A hand-held flashlight has a housing for two independent electrical systems: a primary system and a backup system. Each of the systems includes a light source, a power source and a switching device for selectively connecting a power source to a corresponding light source. The backup system uses high performance components to insure that the flashlight is operational for long time periods. The backup system is actuated only after the the primary system has failed. An indicator announces when the backup system is in operation.

REFERENCES:
patent: 1946059 (1934-02-01), Buchholz
patent: 1974292 (1934-09-01), Walsh
patent: 2520023 (1950-08-01), Allen
patent: 2716700 (1955-08-01), La France
patent: 2966580 (1960-12-01), Taylor
patent: 3299262 (1967-01-01), Duncan
patent: 4152755 (1979-05-01), Trosper et al.
patent: 4333129 (1982-05-01), Ewing
patent: 4340930 (1982-07-01), Carissimi

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