Electric lamp and discharge devices: systems – With radiant energy sensitive control means – Radiant energy controlled regulation of the current supply...
Patent
1989-02-01
1990-08-14
Pascal, Robert J.
Electric lamp and discharge devices: systems
With radiant energy sensitive control means
Radiant energy controlled regulation of the current supply...
315209R, 315291, H05B 3702
Patent
active
049490141
ABSTRACT:
A low cost, highly efficient, lightweight device for regulating the luminous flux output of an incandescent headlamp as its battery supply voltage changes. The device maintains nearly constant output and allows nearly all of the energy capacity of the battery to be utilized. The device makes practical the use of low cost, readily available batteries to power wild land firefighter's headlamps. The output of an unregulated headlamp diminishes rapidly as the batteries discharge.
REFERENCES:
patent: 4156166 (1979-05-01), Shapiro et al.
patent: 4238709 (1990-12-01), Wallace
Connors William J.
Pascal Robert J.
Silverstein M. Howard
The United States of America as represented by the Secretary of
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