Fail-safe uninterruptible lighting system

Details Fail-safe uninterruptible lighting system Fail-safe uninterruptible lighting system

1995-06-06

1997-07-08

Pascal, Robert

Electric lamp and discharge devices: systems

Automatic substitution of the power supply

307 66, H05B 3702

Patent

active

056464860

ABSTRACT:
A fail safe power supply system specially adapted for supplying power to devices such as lights. A battery is provided to supply power to the devices, and during normal operation, charge on the battery is maintained within selected levels by a charging control system that is connected to a source of commercial power. During a commercial power outage, the battery continues to supply normal power to the devices for a prolonged period of time, usually until commercial power is restored, thus obviating the necessity for a separate backup power source.

REFERENCES:
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patent: 3440435 (1969-04-01), Sanders
patent: 3480791 (1969-11-01), Lesher
patent: 3691450 (1972-09-01), Cox
patent: 3743918 (1973-07-01), Maitre
patent: 3801794 (1974-04-01), Mauch et al.
patent: 3836815 (1974-09-01), Herzog
patent: 4075504 (1978-02-01), Gnaedinger
patent: 4673826 (1987-06-01), Masson
patent: 4751398 (1988-06-01), Ertz, III
patent: 5471114 (1995-11-01), Edwards et al.

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