Circuit breaker with smooth sliding operation

Details Circuit breaker with smooth sliding operation Circuit breaker with smooth sliding operation

1988-11-17

1990-07-31

Picard, Leo P.

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Automatic circuit-interrupting devices

335 6, H01H 7500

Patent

active

049453254

ABSTRACT:
A circuit breaker wherein at least a pin sliding surface of a guide hole of a first contact arm, at least a pin sliding surface of a long hole of a second contact arm, and at least a contact surface of a second pin in contact with both the pin sliding surfaces, are treated by low-friction treatment to reduce frictional resistance, and surface-treated to provide surfaces exempt from attachment of molten metal caused by arcing; and furthermore at least the pin sliding surface of the first contact arm and at least the pin sliding surface of the long hole of the second contact arm are hardened to provide both the pin sliding surfaces with greater hardness than the second pin, thereby ensuring smooth movement of the second pin.

REFERENCES:
patent: 4635014 (1987-01-01), Erb et al.
patent: 4745384 (1988-05-01), Toda et al.

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