High-speed seesaw breaking switch with raised fulcrum and accele

Details High-speed seesaw breaking switch with raised fulcrum and accele High-speed seesaw breaking switch with raised fulcrum and accele

1996-11-26

1998-08-18

Scott, J. R.

Electricity: circuit makers and breakers

Snap

Double snap

200 6B, H01H 508, H01H 1320, H01H 1352

Patent

active

057947643

ABSTRACT:
A high-speed breaking switch of the seesaw type having an up-and-down contact plate balanced at the middle by the support of the switch body, a push member slidably attached to the up-and-down contact plate to push the up-and-down plate against the support all the time and at least one terminal formed on the switch body to permit one end of the up-and-down contact plate to abut thereon. The up-and-down contact plate has a raised fulcrum vertically at a level which is higher than the level at which the push member abuts on the up-and-down contact plate. The raised fulcrum is formed by a pair of raised fulcrum archs, one on each side of the contact plate. The up-and-down contact plate has a ramp-and-step plateau or inverted "V"-shaped projection formed thereon. This arrangement increases the rotating force or moment of the up-and-down contact plate, thereby increasing the speed at which the connections in an associated electric circuit can be broken, thereby suppressing the arc across the contact-to-contact space.

REFERENCES:
patent: 3935411 (1976-01-01), Ford
patent: 3944768 (1976-03-01), Aryamane et al.
patent: 4127754 (1978-11-01), Josemans et al.
patent: 4241244 (1980-12-01), Swann
patent: 4408105 (1983-10-01), Tanaka
patent: 4524253 (1985-06-01), Sorenson
patent: 4697053 (1987-09-01), Lockard
patent: 5293507 (1994-03-01), Hayakawa
patent: 5597989 (1997-01-01), Nishio

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