Title:
CIRCUIT BREAKER
Document Type and Number:
Japanese Patent JPS60175335
Kind Code:
A
Abstract:
A circuit breaker comprising a main contact portion and an actuator portion spaced therefrom and intercoupled therewith by a toggle mechanism, the main contact portion including a fixed-contact member and a movable-contact assembly being actuated into and out of closed relationship with the fixed-contact member by the toggle mechanism upon operation of a hand crank to which is attached an actuator shaft which carries a cam, rotation of the cam by the actuator shaft resulting in movement of the toggle mechanism from a folded condition to an extended condition, closing energy being stored simultaneously in a closing spring assembly through the action of a transmission link carried on the actuator shaft and coupled to the closing spring, such transmission link being coupled to a cam follower which carries a drive plate thereon, such drive plate being coupled to the toggle mechanism, such cam follower being limited in its rotation by a locking action, following which rotation of the actuator shaft stores energy in the closing spring assembly for controlled release upon selective activation by the operator, the transmission link rotating less than 180 degrees in going from the energy storing mode to the energy releasing mode, as a result of which only slight spring length changes occur and high mechanical efficiency is realized, along with high immunity from arcing.
Inventors:
FUJIKAKE AKIO
Application Number:
JP2986284A
Publication Date:
September 09, 1985
Filing Date:
February 20, 1984
Export Citation:
Assignee:
FUJI ELECTRIC CO LTD
International Classes:
H01H33/40; H01H3/42; H01H3/46; H01H5/06; H01H73/38; H01H77/00; H01H3/30; (IPC1-7): H01H5/06; H01H73/00
Attorney, Agent or Firm:
Iwao Yamaguchi