US 5,457,295 A · Circuit breaker

Abstract

A circuit breaker-includes: a casing having a base and a main cover secured to the base, the casing accommodating a circuit breaking mechanism; a recesses formed in one surface of the main cover, the opposite surface of which is on the side of the base, the recess being adapted to receive an auxiliary device of the circuit breaking mechanism; and an auxiliary cover mounted on the main cover in such a manner as to close the recess. The circuit breaker is automatically tripped when the auxiliary cover is opened, thus permitting installation of the auxiliary device thereon with high security.

Claims19

Dependent claims

A circuit breaker comprising:

a casing including a base and a main cover secured to the base, the casing accommodating a circuit breaking mechanism, the main cover having a recess formed therein;
an auxiliary electrical device received in the recess;
an auxiliary cover removably mounted on the main cover in such a manner as to close the recess;
and
means for preventing the auxiliary cover from being removed unless the circuit breaker is not in an ON state.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

08/125,175Filed 23 Sep 1993

Priority

JP 4-25772328 Sep 1992

Granted

10 Oct 1995

Term ends

Not estimatedThe source records don’t support an estimate.

Classification4 codes

H01H 71/126
Automatic release mechanisms with or without manual release: actuated by dismounting of circuit breaker or removal of part of circuit breaker
H01H 71/0228
Mounting or assembling the different parts of the circuit breaker: having provisions for interchangeable or replaceable parts
H01H 71/128
Automatic release mechanisms with or without manual release: manual release or trip mechanisms, e.g. for test purposes
H01H
Electric switches

Circuit breaker

Life of this patent

Circuit breaker

Life of this patent

Abstract

Claims19