Devices for detecting the rupture of an electrical circuit eleme

Details Devices for detecting the rupture of an electrical circuit eleme Devices for detecting the rupture of an electrical circuit eleme

1979-07-19

1981-04-21

Brigance, Gerald L.

Communications: electrical

Condition responsive indicating system

Specific condition

340652, G08B 2100

Patent

active

042635896

ABSTRACT:
The device comprises means for applying a DC voltage U as a function of the voltage taken from the terminals of a fuse between a fixed electrode and a movable electrode forming together a capacitor. The movable electrode is urged towards the fixed electrode by an electret fast to the latter and in the opposite direction by a magnet and by the voltage U. As soon as this voltage exceeds a threshold corresponding to the rupture of the fuse, the movable electrode swings over and closes a switch for warning purposes.

REFERENCES:
patent: 1036620 (1912-08-01), Hawley
patent: 2495981 (1950-01-01), Parkenson
patent: 2637020 (1953-04-01), Stegall
patent: 2913712 (1959-11-01), Lee
patent: 2993148 (1961-07-01), Pywell
patent: 3045167 (1962-07-01), Colaiaco
patent: 3158761 (1964-11-01), Bullock
patent: 3460079 (1969-08-01), Di Marco
patent: 3634735 (1972-01-01), Komatsu

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