Safety disconnect switch for suspended cables

Electricity: conductors and insulators – Overhead – Ground clamps and cable clips

Patent

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Details

200 79, 248 64, H02G 718

Patent

active

041951921

ABSTRACT:
A safety disconnect switch for mounting on a utility pole to serve as an anchor at one end of a suspended service entrance cable extending to a remote building, so as to first disconnect the cable and then drop it harmlessly to the ground upon an excessive tension force being applied to the cable by a falling tree or the like. This device includes a movable terminal clamping means or slider that joins the termial ends of the wires of the suspended cable to the bus bars of the incoming power supply lead wires. A detent switch mechanism or means holds the movable terminal clamping means in either a first fixed position or a second cable-released position. The detent switch means also includes a locking means and a trigger means to open the locking means upon a predetermined tension force being exerted on the suspended cable.

REFERENCES:
patent: 470382 (1892-03-01), Kerstein
patent: 3519727 (1970-07-01), Rasmussen et al.
patent: 3711049 (1973-01-01), Grannis
patent: 3761865 (1973-09-01), Bomgaars et al.

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