Protection device for telephone line and interface

Details Protection device for telephone line and interface Protection device for telephone line and interface

1995-02-13

1999-07-27

Chiang, Jack

Telephonic communications

Terminal accessory or auxiliary equipment

Protective structure

379437, H04M 100

Patent

active

059303557

ABSTRACT:
A non-armored apparatus for protecting an exterior telephone service line and telephone connection box. The apparatus comprises a layered structure which includes a non-conductive, preferably plastic or rubber substrate, which is sized and dimensioned to encase a space which includes the telephone service line and telephone connection box. A pair of conductive layers or films, separated by an insulating layer, are disposed on the substrate. Each of the conductive layers is electrically connected to an electrical contact which in turn is connected to a building alarm and/or security system. Detection switches are also provided to detect any unauthorized attempt to remove the shield. Any attempt by an intruder to cut the telephone service lines or disconnect the telephone connection box will trigger an alarm via the detection switch and/or a short circuit created between the conductive layers by, for example, use of a drill, saw, knife, or the like, to penetrate the shield.

REFERENCES:
patent: 2879725 (1959-03-01), Zuver
patent: 3633194 (1972-01-01), Kothe
patent: 4246451 (1981-01-01), Nix
patent: 4673771 (1987-06-01), Grant
patent: 4731819 (1988-03-01), Kalfon
patent: 5018185 (1991-05-01), Riddle
patent: 5315654 (1994-05-01), Kraft
patent: 5369548 (1994-11-01), Combs

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