Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – Automatic circuit-interrupting devices
Patent
1997-05-28
1998-12-01
Donovan, Lincoln
Electricity: magnetically operated switches, magnets, and electr
Electromagnetically actuated switches
Automatic circuit-interrupting devices
218 22, H01H 7500
Patent
active
058444556
ABSTRACT:
A current-limiting apparatus for a circuit breaker which makes it possible to effectively protect an electric load element by quickly blocking an electric flow path when an excessive current flows due to a ground, shortage, etc. at an electric flow path and preventing a re-formation of an electric flow path after the electric flow path is blocked. The apparatus includes a guide pin passing through the second pin hole and being extended from both side surfaces of the movable contact member, a holder, a portion of which support both ends of the movable contact member rotation center pin, for rotatably supporting the movable contact member, a current-limiting latch having a curved guide surface formed on one outer circumferential surface of the same on which the guide pin slidably moves, a support groove formed on another outer circumferential surface of the same, and a pin hole for supporting the holder, a rotation center pin inserted into the pin hole of the current-limiting latch, both ends of which rotation center pin are inserted into portions of the holder, and a contact spring, both ends of which are supported by the support groove of the current-limiting latch and the support surface of the holder, for generating a variable force which prevents the movable contact member from being rotated.
REFERENCES:
patent: 4528531 (1985-07-01), Flick et al.
patent: 4855549 (1989-08-01), Toda et al.
Donovan Lincoln
LG Industrial Systems Co. Ltd.
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