Telescopic spring operable as an electric switch

Details Telescopic spring operable as an electric switch Telescopic spring operable as an electric switch

1978-11-24

1980-12-02

Scott, James R.

Electricity: circuit makers and breakers

Special application

200 6119, H01H 312, H01H 3538, F16F 950

Patent

active

042373530

ABSTRACT:
A telescopic spring has an outer spring member and an inner spring member movable inward and outward of a cavity in the outer spring member. Fasteners on the spring members outside the cavity permit the spring members to be fastened to respective objects. A compressed gas in the cavity outwardly biases the inner spring member. One of the spring members carries a contact element which engages a conductive face portion of the inner spring member during one portion of the movement of the inner spring member. Insulating matter insulates the contact element from the conductive face portion during another portion of the movement. Two electrical connectors outside the cavity are conductively connected to the contact element and the conductive face portion respectively.

REFERENCES:
patent: 1003455 (1911-09-01), Hardwick
patent: 2845503 (1958-07-01), Durand
patent: 3339910 (1967-09-01), Jackson
patent: 3606375 (1971-09-01), Jackson
patent: 3610611 (1971-10-01), Elliott et al.
patent: 3853331 (1974-12-01), Jones
patent: 3919509 (1975-11-01), Schnitzius
patent: 4163970 (1979-08-01), Allinquant et al.

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