Emergency lighting system provided with a fluorescent tube

Details Emergency lighting system provided with a fluorescent tube Emergency lighting system provided with a fluorescent tube

1989-07-19

1991-05-14

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

Automatic substitution of the power supply

315 87, 315127, 315171, 315200R, 320 2, H05B 3704, H05B 4114

Patent

active

050159194

ABSTRACT:
An emergency lighting system provided with a U-shaped fluorescent tube having power supplied by a square wave oscillator connected to a relatively small sized battery. A battery charger is employed to charge the battery when the standard AC source is connected to the network. An electronic switching circuit is included which will switch the oscillator on when a network failure is sensed and will switch if off when the network appears to be operating properly. The switching circuit also ensure that the battery does not discharge below a particular voltage level.

REFERENCES:
patent: 3348060 (1967-10-01), Jamieson
patent: 3599070 (1971-08-01), Davis
patent: 3659179 (1972-04-01), Barker et al.
patent: 3660714 (1972-05-01), Chandler
patent: 4232252 (1980-10-01), Peil
patent: 4388563 (1983-06-01), Hyltin
patent: 4583004 (1986-04-01), Yearsin
patent: 4728808 (1988-03-01), Bet-Esh et al.
patent: 4920299 (1990-04-01), Presz et al.

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