Back up system for the supply of voltage in television cable sys

Details Back up system for the supply of voltage in television cable sys Back up system for the supply of voltage in television cable sys

1997-07-23

1998-05-05

Elms, Richard T.

Electrical transmission or interconnection systems

Plural supply circuits or sources

Substitute or emergency source

307 64, 348 6, 348 8, 455 671, 455115, H04H 700

Patent

active

057478880

ABSTRACT:
A back-up system for the supply of electric voltage to the main trunk and secondary amplifier located within a television cable system when an electric fault in the electric supply occurs includes switching members in the system. The switching members may be a relay, a triak or a transistor which are automatically actuated when an electric fault occurs which cause a change of direction of the supply of electricity to the cable system. The switching members may be located within the trunk and may be connected to an in/out supply socket, to a fuse terminal or to a voltage supply selecting socket.

REFERENCES:
patent: 3818272 (1974-06-01), Rich
patent: 3860748 (1975-01-01), Everhart et al.
patent: 3909560 (1975-09-01), Martin
patent: 4362951 (1982-12-01), Turner et al.
patent: 4412245 (1983-10-01), Kwok
patent: 4558358 (1985-12-01), Onda
patent: 4741048 (1988-04-01), Mori
patent: 5020134 (1991-05-01), Pecault
patent: 5434610 (1995-07-01), Loveless

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