Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – Automatic circuit-interrupting devices
Patent
1979-03-06
1981-04-07
Broome, Harold
Electricity: magnetically operated switches, magnets, and electr
Electromagnetically actuated switches
Automatic circuit-interrupting devices
335 36, H01H 7348
Patent
active
042609690
ABSTRACT:
A low voltage circuit breaker has an insulating housing which is split along a parting line into an upper part and a lower part. Disposed in the housing is an electromagnetic tripping device which comprises a fixed magnet yoke and a movably disposed armature. By means of trunnion (pivot) pins of rectangular cross-section the armature is mounted in bearing openings designed in the form of pocket-like cutouts in the wall surfaces of the lower part which limit the pole channels of the circuit breaker. The bearing surface of the bearing openings associated with a narrow surface of each trunnion pin may be composed of two subsurfaces disposed at an angle to each other so that an edge-like bearing results. For the attachment of the magnet yoke there is provided on the lower part of the housing an island-like projection which is spaced from the wall surfaces and against which the central part of the magnet yoke is caused to rest by a spring element. In addition, a protrusion of a conductor serves to secure the magnet yoke in its position.
REFERENCES:
patent: 3178535 (1965-04-01), Gelzheiser et al.
patent: 3743981 (1973-07-01), Geleziunas
patent: 3909764 (1975-09-01), Belttary
Klatt Erwin
Troebel Werner
Broome Harold
Siemens Aktiengesellschaft
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