Title: Circuit breaker with one-way adjustment of tripping current level

Abstract: A molded case circuit breaker having a solid-state trip unit adjustable over a variety of ratings. One-way adjustment is provided, permitting a reduction in the rating of the circuit breaker and preventing an increase in the rating. A ratchet mechanism and a one-way screw mechanism are provided to implement the one-way adjustment.

Do you think this is a good invention? Vote now:

Votes so far: For:(0) Against:(0)
Other info:

Inventors: Hendry, Allen J. (Beaver, PA, US)
Maier, Alfred E. (Beaver Falls, PA, US)

Application Number: 513784
Filing Date: 1974-10-10
Publication_date: 1976-08-17
Assignee: Westinghouse Electric Corporation (Pittsburgh, PA)
Primary Class(es): 335/176 335/42, 337/57, 337/82, 337/94
Other Classes:
US Patent Ref:

3240903	Mar, 1966	Groves et al.	337/82.
3593234	Jul, 1971	Charbonneau et al.	335/176.

Other Refs:
Primary Examiner: Broome, Harold
Assistant Examiner:
Attorney: Converse, Jr.; R. E.