Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – Automatic circuit-interrupting devices
Patent
1981-09-11
1983-08-16
Broome, Harold
Electricity: magnetically operated switches, magnets, and electr
Electromagnetically actuated switches
Automatic circuit-interrupting devices
335 23, 335 35, H01H 7348
Patent
active
043994202
ABSTRACT:
The following specification describes a circuit breaker having a handle pivoted about an axis transverse to the axis of blade rotation for controlling an operating assembly to pivot a cam about an axis parallel to the blade axis to open or close the breaker contacts. The operating assembly is located in the center compartment of the breaker while the contacts and blades are located in end compartments of the breaker, and when the blades are moved past a predetermined position, they are then independently moved by a respective snap acting spring. Sensing means control the operating assembly in the event of a fault current to move to a trip position and open the contacts while providing a visual signal of the trip condition. Arc gases are vented to prevent engagement with the copper conductor connected to each contact and a stainless steel blade bracket is interposed between the movable contact and the copper blade to prevent an arc from contacting the copper blade.
REFERENCES:
patent: 4011420 (1977-03-01), Heft
patent: 4291291 (1981-09-01), Merchant
patent: 4307359 (1981-12-01), Schultz
Palmer Neil R.
Winter John M.
Broome Harold
Golden Larry I.
Guttman Richard T.
Lesser Norton
Square D Company
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