Tap resistant security circuit

Details Tap resistant security circuit Tap resistant security circuit

1997-10-14

1999-03-09

Gaffin, Jeffrey

Electrical transmission or interconnection systems

Vehicle mounted systems

Automobile

307 101, 200 81R, 200 6108, 200300, 180287, 123198DC, G08B 2100

Patent

active

058805354

ABSTRACT:
A tap-resistant security circuit. In the preferred embodiment, the apparatus includes a conduit including an electrically conductive wire surrounded by a gas-filled, gas impermeable sheath. At one end of the conduit is a pressure switch which is normally open but is maintained closed by the pressure in the gas-filled conduit. The other end of the conduit is sealed. If the gas-filled conduit is disturbed, for example, if an attempt is made to cut the wire, the gas within the conduit escapes, the pressure holding the switch closed drops and the circuit is opened. As a result, any attempt to by-pass or "tap" the wire results in the current through the wire being interrupted.

REFERENCES:
patent: 1855321 (1932-04-01), Shackelton
patent: 1904226 (1933-04-01), Henneberger
patent: 1904227 (1933-04-01), Henneberger
patent: 2089179 (1937-08-01), Black
patent: 2219262 (1940-10-01), Mample et al.
patent: 3217309 (1965-11-01), Parker
patent: 3259892 (1966-07-01), Wickelmann
patent: 3268867 (1966-08-01), Pickett et al.
patent: 3271752 (1966-09-01), Lansch
patent: 3444336 (1969-05-01), Holt et al.
patent: 3512556 (1970-05-01), McKhann
patent: 3757292 (1973-09-01), Sato et al.
patent: 4122436 (1978-10-01), Gmeiner et al.
patent: 4322590 (1982-03-01), Sobel
patent: 4439894 (1984-04-01), Schwiers et al.
patent: 4908483 (1990-03-01), Miller
patent: 5168240 (1992-12-01), Howe
patent: 5225643 (1993-07-01), Marchant
patent: 5359927 (1994-11-01), Demeyer
patent: 5362100 (1994-11-01), Werbelow et al.
patent: 5398965 (1995-03-01), Giurlando et al.
patent: 5410916 (1995-05-01), Cook

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