Electricity: electrical systems and devices – Safety and protection of systems and devices – With specific circuit breaker or control structure
Patent
1977-11-23
1980-01-01
Broome, Harold
Electricity: electrical systems and devices
Safety and protection of systems and devices
With specific circuit breaker or control structure
335 6, 335172, 361 96, H02H 308, H01H 7702
Patent
active
041819225
ABSTRACT:
A circuit interrupter includes an adjustable trip unit for tripping the circuit breaker to the open circuit position upon overload current conditions. The trip unit includes a shorting plug adjuster comprising a pair of connecting pins electrically connected together and insertable into cooperating sockets in the trip unit housing. One of the pins is common to all adjustment positions and is of greater length, having a retaining clip at the end thereof to permit the adjuster to be partially withdrawn, pivoted about the common pin, and inserted into the desired position. The adjuster comprises a flange which covers the trip unit panel socket in all positions, thereby providing protecting against dust and other contamination. The adjuster is cheaper and more reliable than the prior art, providing increased protection against shock, vibration, and contact bounce.
REFERENCES:
patent: 1094156 (1914-04-01), Lowe
patent: 2373156 (1945-04-01), Wilhelm
patent: 3761778 (1973-09-01), Willard
patent: 3826951 (1974-07-01), Mater et al.
patent: 4060844 (1977-11-01), Davis et al.
Matsko Joseph J.
Shimp Alan B.
Skalka Paul
Broome Harold
Converse, Jr. Robert E.
Westinghouse Electric Corp.
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