Vehicle sensing device

Details Vehicle sensing device Vehicle sensing device

1987-11-04

1989-06-13

Tolin, Gerald P.

Electricity: circuit makers and breakers

Weight

Treads

338114, 340666, 200 86R, H01H 316

Patent

active

048394807

ABSTRACT:
A vehicle sensing device comprises an electrically insulating elongate carrier (1) with two electrical conductors (2,3) extending longitudinally of the carrier and spaced apart transversely of the carrier so that there is no direct contact between the conductors. A strip (14) of elastomeric material overlies both conductors and is in contact therewith in areas distributed along substantially the whole of their length. The strip (4) being such that in the absence of a given level of applied pressure the strip forms a barrier of high electrical resistance between the conductors, and that in the presence of applied pressure above the given level in any region of the strip, that region of the strip forms an electrically conductive path between the conductors. The carrier, conductors and strip are wholly encapsulated in a jacket of water-resistance and abrasion-resistance elastomeric material.

REFERENCES:
patent: 3794790 (1974-02-01), Leyland
patent: 4172216 (1979-10-01), O'Shea
patent: 4529959 (1985-07-01), Ito
patent: 4742196 (1988-05-01), Kelly

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