Fusible circuit breaker

Details Fusible circuit breaker Fusible circuit breaker

1982-08-20

1985-12-03

Rowland, James L.

Communications: electrical

Condition responsive indicating system

Specific condition

337242, 340639, G08B 2100

Patent

active

045568740

ABSTRACT:
A fuse-type circuit breaker having a fuse link which is manually pivotal in a housing between an on position and an off position. The fuse link has contact caps which, when in the open position, short-circuit two current contacts which are fixed to the housing. Also provided is an operating state indicator device which includes a light source for the fuse link. The indicator device, at least in the on position, is electrically connected with the two contact caps of the fuse link and with the two current contacts. The indicator device is in parallel with the latter and is provided with a very high electrical resistance relative to the fuse link. The indicator device is in the form of a blinker which incorporates a capacitor, a first diode connected ahead of the capacitor, and a charging resistor as well as a glow lamp connected in parallel with the capacitor and in series with a discharging resistor.

REFERENCES:
patent: 2176227 (1939-10-01), Schultz et al.
patent: 3379842 (1968-04-01), Downs et al.
patent: 3831089 (1974-08-01), Pearce
patent: 4394602 (1983-07-01), Apgar et al.
Raphael, "Neon-Bulb Circuit Doubles as Pilot Light and Trouble Light", Electronic Design, Jan. 1970, p. 130.
van Beek, "Fuse Indicator", Elektor Book 75, 1977, p. 50.

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