Flashlight with hybrid battery and electronic control circuit

Details Flashlight with hybrid battery and electronic control circuit Flashlight with hybrid battery and electronic control circuit

1989-11-28

1995-05-23

Popek, Joseph A.

Electric lamp and discharge devices: systems

Plural power supplies

Diverse-type current supplies

315176, 315291, 315307, 362157, H05B 3702

Patent

active

054184339

ABSTRACT:
A flashlight has a hybrid battery pack consisting of a primary-cell battery (ex: an Alkaline battery) and an auxiliary rechargeable battery of low internal resistance (ex: a Ni--Cad battery). Connected in circuit between the batteries and the flashlight's light bulb is a slide switch and an electronic control circuit. The slide switch has an OFF-position, an ON-position, and a spring-loaded variable BOOST-position. In full BOOST, the electronic control circuit operates such as to apply a voltage of about 1.5 times normal magnitude to the light bulb; thereby increasing the flashlight's light output by a factor of about 4.0 above normal. However, at that degree of BOOST, if indeed maintained on a continuous basis, the life of the light bulb will be shortened to about 15 minutes versus about 50 hours when used in the normal ON-position. The function of the auxiliary battery, which is controllably charged by the primary-cell battery, is that of permitting the size of the primary-cell battery to be much smaller than otherwise would be required to provide the increased power associated with the BOOST-position.

REFERENCES:
patent: 3885148 (1975-05-01), Di Benedetto
patent: 4023067 (1977-05-01), Zelina et al.
patent: 4234822 (1980-11-01), Garrison et al.
patent: 4257088 (1981-03-01), Nilssen
patent: 4499525 (1985-02-01), Mallory
patent: 4651061 (1987-03-01), Spissinger
patent: 4667142 (1987-05-01), Butler
patent: 4777427 (1988-10-01), Kiyohara
patent: 4920302 (1990-04-01), Konopka

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