High-voltage switches with arc preventing or extinguishing devic – Arc preventing or extinguishing devices – Magnetic blowout
Patent
1994-09-28
1996-12-17
Brown, Brian W.
High-voltage switches with arc preventing or extinguishing devic
Arc preventing or extinguishing devices
Magnetic blowout
335 16, 218 32, H01H 7500
Patent
active
055856098
ABSTRACT:
A circuit breaker including a base having an operating mechanism mounted thereon, a line contact blade assembly coupled to the operating mechanism for movement between open and closed positions, and a load contact blade assembly pivotally supported by a terminal strap for movement between an open and closed position with respect to the line contact blade is disclosed herein. A load blade return spring is positioned to bias the load contact blade assembly into engagement with the line contact blade. Furthermore, a multi-force spring device is disposed to apply a first force to the load contact blade while the load contact blade is in the closed position and a second force to the load contact blade in the blow open position, wherein the first force is greater than the second force.
REFERENCES:
patent: 4594567 (1986-06-01), DiMarco et al.
patent: 4595896 (1986-06-01), DiMarco et al.
patent: 4680564 (1987-07-01), DiMarco et al.
patent: 4695690 (1987-09-01), Banfi
patent: 5164560 (1992-11-01), Uchida et al.
patent: 5184099 (1993-02-01), DiMarco et al.
Brown Brian W.
Friedhofer Michael A.
Siemens Energy & Automation Inc.
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