Magnetic switch

Patent 4489297 Issued on December 18, 1984. Estimated Expiration Date:

March 15, 2002. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

2521723

3056000

3062932

3236964

3273091

3447110

Magnet pole pieces and pole piece extensions and shields Patent #: 4359706
Issued on: 11/16/1982
Inventor: Flack

Inventor

Haydon, Arthur W. (deceased)executor: Haydon, Jean F.; Middlebury

Application

No. 06/357868 filed on 03/15/1982

US Classes:

335/207, Plural magnets200/404, Magnetic snap200/538, Push/pull rod200/547, Slide switch (handle projects perpendicular to motion)200/553, Rocking actuator (e.g., rocker, lever)200/557Actuator biasing mechanism

Examiners

Primary: Broome, Harold

Attorney, Agent or Firm

Robinson, Jr.; Lee C.

International Class

H01H 36/00 (20060101)

Abstract

A magnetic switch has a fixed contact, a movable contact, and a flat, flexible blade supporting the movable contact, and movable between first and second positions in which the contacts are respectively engaged and disengaged. A blade magnet is affixed to the free end of the blade and is movable with it. An actuator is selectively movable to first and second positions corresponding to the first and second positions of the blade. An actuator magnet is positioned on the actuator in facing opposition to the blade magnet. When the actuator is moved to its first and second positions, one pole of the actuator magnet is disposed beyond the position of the blade magnet when the blade is in its respective first and second position. Thus, when the actuator is moved to one of its first and second positions, the blade magnet is repelled by the actuator magnet to drive the blade, with snap action, to the other of its first and second positions.