Abstract: In an overload protective circuit breaker, a fixed contact element and a bimetal contact element are arranged in parallel beside each other. When a current overload occurs and the bimetal junction is heated, a movable contact post on a snap disc mounted on the bimetal contact element moves away from a fixed contact post on the fixed contact element, thereby breaking circuit, and an insulating wall piece of a slider body will be moved automatically into the gap between the two contact posts so as to break circuit and cut off an arc forming between the two moving-apart posts and accelerating cooling of the bimetal junction. Returning the circuit breaker to circuit-making position requires depression of a push button which is preferably a leg of an L-shaped switch member, the other L-leg being constituted by the slider body.

Abstract: A preferably push button-actuated overload protective circuit breaker with bimetal cut-out is devised for being plugged into a flat female plug socket. The circuit breaker comprises a bimetal contact element and a fixed contact element besides each other and consisting each of an elongated punched-out part of substantially flat right parallelepiped shape. They have outer ends protruding out of a circuit breaker housing and lying with their flat longitudinal sections in the same plane, while their inner free ends inside the housing have their flat longitudinal sections lying in two different planes which are parallel with, but spaced from each other. A bimetal snap element is fastened at one end thereof, on the inner free end of the bimetal contact element and overlaps with its opposite slewable end, which bears a bimetal contact post, the inner free end of the fixed contact element and a fixed contact post thereon.

Abstract: A method of moulding an element of an insulating material, such as a thermosetting plastics material, on a bimetal strip in which the bimetal strip is clamped in an injection mould by narrow clamping jaws disposed on either side of the mould cavity in the longitudinal direction of the bimetal strip. The width of the clamping jaws is such as to enable the remaining portions of bimetal strip to bow freely in response to heat present in the injection mould.The bimetal strips may be processed individually or as a group formed from a blank, the individual bimetal strips in the group being transversely joined to each other.