Electricity: circuit makers and breakers – Weight – Treads
Patent
1987-08-14
1988-08-09
Tolin, G. P.
Electricity: circuit makers and breakers
Weight
Treads
200 85R, 340666, H01H 314
Patent
active
047629703
ABSTRACT:
A rugged pressure actuated cable switch especially suitable for use in road vehicle detection comprises a central elongate conductor; a flexible insulating element helically wound around central conductor; a flexible tubular body of electrically conductive plastics material surrounding the central conductor; two elongate conductors in electrical contact with the outer surface of the flexible tubular body, and an overall insulating sheath of a transverse cross-section of approximately semi-circular shape having a flat surface for supporting the cable switch on the ground. Each outer conductor is embedded in the sheath alongside the flexible electrically conductive tubular body at a position intermediate of the flat surface and the longitudinal axis of the central conductor. When a pressure is applied to a part of the overall outer sheath remote from its flat surface, the central conductor is urged in a direction towards the flat surface to effect electrical contact with the two outer conductors via the flexible electrically conductive tubular body.
REFERENCES:
patent: 3277256 (1966-10-01), Jones
patent: 3748373 (1973-07-01), Remy
patent: 3778805 (1973-12-01), Gould
patent: 4060705 (1977-11-01), Peachey
patent: 4268714 (1981-05-01), Mori
patent: 4551713 (1985-11-01), Aossey
patent: 4603241 (1986-07-01), Nardi
patent: 4649228 (1987-03-01), Suzuki
BICC Public Limited Company
Casella Anthony J.
Hespos Gerald E.
Tolin G. P.
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