Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – Contact-actuating means
Patent
1978-07-03
1979-12-25
Broome, Harold
Electricity: magnetically operated switches, magnets, and electr
Electromagnetically actuated switches
Contact-actuating means
335 73, 335195, H01H 342
Patent
active
041807880
ABSTRACT:
An electric circuit breaker includes means for providing a predetermined delay between the initiation of a command pulse and the mechanical operation of an element of the circuit breaker in response to the command pulse. In one embodiment, the predetermined delay is provided between a tripping command pulse and the mechanical operation of the trip mechanism of a vacuum circuit breaker. In this embodiment, a translatable armature is coupled to the trip mechanism through mechanical linkage including a flywheel rotatably mounted on a shaft. The shaft is mechanically coupled to the trip mechanism wherein rotation of the shaft operates the trip mechanism. The translatable armature is mechanically coupled to the flywheel so that movement thereof causes the flywheel to rotate through a predetermined rotation. The flywheel includes impact imposing means extending outwardly from a major face thereof. The shaft includes impact receiving means extending radially therefrom. In operation of this embodiment, following the tripping command pulse, the flywheel rotates through the predetermined rotation with a resulting predetermined delay. At the completion of this rotation, the impact imposing means of the flywheel forcefully engages the impact receiving means of the shaft. This causes the shaft to operate the trip mechanism, causing the circuit breaker contacts to open. Means are provided for varying the predetermined delay. Other embodiments are disclosed.
REFERENCES:
patent: 3113191 (1963-12-01), Frank
patent: 3845263 (1974-10-01), Dickinson
patent: 4032870 (1977-06-01), Oppel et al.
Broome Harold
Freedman William
General Electric Company
Silverman Carl L.
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