Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – Contact-actuating means
Patent
1988-08-01
1990-01-02
Broome, H.
Electricity: magnetically operated switches, magnets, and electr
Electromagnetically actuated switches
Contact-actuating means
200147R, H01H 7710
Patent
active
048916188
ABSTRACT:
A laminated contact assembly is formed from a number of individual contact assemblies. Each individual contact assembly includes a contact arm portion, which carries a movable main or arcing contact and a stationary conductor portion. A flexible shunt is used to connect the contact arm portion to the stationary conductor portion. Intermediate individual contact assemblies are provided with T-shaped slots for receiving square-headed fasteners. These square-headed fasteners are captured by adjacent assemblies once the laminated contact assembly is complete. By providing such an arrangement, the need to drill and tap holes in the base of the laminated contact arm assembly is obviated. Since all of the individual contact arm assemblies are fastened together, the possibility of the square-headed fasteners disposed in T-shaped slots in intermediate individual contact arm assemblies is greatly reduced. The flexible shunt is wound from a continuous strip of an electrical conductor and formed into a V-shaped member having extending leg portions which generate magnetic repulsion forces during overcurrent conditions. By utilizing a form wound shunt the cost of the contact arm assembly can be greatly reduced.
REFERENCES:
patent: 3614687 (1971-10-01), Iida et al.
patent: 4489295 (1984-12-01), Altenhof, Jr. et al.
patent: 4583065 (1986-04-01), Favre-Tissot
patent: 4638277 (1987-01-01), Thomas et al.
patent: 4656444 (1987-04-01), McKee et al.
patent: 4679018 (1987-07-01), McKee et al.
Broome H.
Moran M. J.
Westinghouse Electric Corp.
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