Illumination unit for normal and emergency operation

Details Illumination unit for normal and emergency operation Illumination unit for normal and emergency operation

2005-05-31

2005-05-31

Lee, Wilson (Department: 2821)

Electric lamp and discharge devices: systems

Automatic substitution of the power supply

Reexamination Certificate

active

06900595

ABSTRACT:
An illumination unit, that comprises a lamp; an adaptor for attaching the electrical contacts of the unit to contacts of a socket being connected to an electricity network feeding the unit through a switch, the switch electrically connects/disconnects at least one contact of the unit to/from the electricity network, while being in its conductive
onconductive state, respectively; a rechargeable element for supplying electrical power form to the lamp during emergency period, when the electricity network fails, and an electronic circuit for automatically detecting the state of the switch and failure of the electricity network and to operate the lamp, which is operative to disconnect the unit from the rechargeable element from the electricity network, if failure is detected whenever the switch being in its conductive state, or otherwise, to disconnect the unit from the electricity network and from the rechargeable element whenever the switch being in its nonconductive state.

REFERENCES:
patent: 4061956 (1977-12-01), Brown et al.
patent: 4350930 (1982-09-01), Peil et al.
patent: 5426347 (1995-06-01), Nilssen
patent: 5473517 (1995-12-01), Blackman
patent: 5646486 (1997-07-01), Edwards et al.
patent: 6107744 (2000-08-01), Bavaro et al.
patent: 6479965 (2002-11-01), Barbeau et al.

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