Device for regulating luminous flux of battery powered headlamp

Electric lamp and discharge devices: systems – With radiant energy sensitive control means – Radiant energy controlled regulation of the current supply...

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Details

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

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