Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – Automatic circuit-interrupting devices
Patent
1982-09-10
1984-07-10
Miller, J. D.
Electricity: magnetically operated switches, magnets, and electr
Electromagnetically actuated switches
Automatic circuit-interrupting devices
335 23, H01H 7300, H01H 7348
Patent
active
044595727
ABSTRACT:
A circuit breaker having a pivotal movable contact arm (6) operated between open and closed positions with a stationary contact (14c) by an overcenter drive spring (8) in response to pivotal movement of a manual operating handle (4). A latch lever (10) is provided to locate the other end of the drive spring (8) and is releasable upon overload currents to carry the point of connection (10d) of the drive spring and latch lever essentially downward in line with the line of action of the drive spring to quickly reduce its force and stored energy, thereby quickly reducing the contact pressure provided thereby and enabling constriction and/or repulsion forces to separate the contacts (6c,14c). A further amount of movement of the latch lever (10) carries the point of connection (10d) of the drive spring and latch lever across the pivot plane of the movable contact arm (6) to separate the contacts. The latch lever (10) is released by a pivotally supported latch arm (12). A bimetal current sensing member (20) is supported upon a high resistance terminal (18) to concentrate heat in the bimetal member (20) adjacent its fixed end, thereby causing greater deflection at the free end of the bimetal. An extension (18b) of the terminal (18) projects inwardly of the breaker and it is disposed adjacent an arc extinguishing structure (26) to provide a bypass path for high overload current existing in the arc to protect the bimetal from damage.
REFERENCES:
patent: 2502537 (1950-04-01), Speck
patent: 3953812 (1976-04-01), Heft et al.
Fajner Michael J.
Rzepecki Marian M.
Theisen Peter J.
Andrews George
Eaton Corporation
Grace C. H.
Miller J. D.
Vande Zande L. G.
LandOfFree
Circuit breaker with improved latch trip mechanism does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Circuit breaker with improved latch trip mechanism, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Circuit breaker with improved latch trip mechanism will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1578807