Electricity: magnetically operated switches – magnets – and electr – Permanent magnet-actuated switches
Reexamination Certificate
2006-04-25
2006-04-25
Donovan, Lincoln (Department: 2832)
Electricity: magnetically operated switches, magnets, and electr
Permanent magnet-actuated switches
C335S017000
Reexamination Certificate
active
07034644
ABSTRACT:
The auxiliary switch includes a non-contact sensor, such as a Hall effect device, that is switched by the condition of a magnetic field. The magnetic field condition is effected by a movable contact indicator that moves between open and closed positions with the separable contacts of the electric power apparatus. A magnet may be attached to the movable contact indicator, or the movable contact indicator can be magnetized to form the magnet. Alternatively, the moving contact indicator can intercept or not intercept a magnetic field produced by a fixed magnet spaced from the sensor. The Hall effect device may be mounted on the outside of the nonmagnetically permeable housing of the electric power apparatus, or inside if there is sufficient room. In either case, no mechanical coupling is required for the sensor.
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patent: 5612579 (1997-03-01), Wisbey et al.
patent: 6326871 (2001-12-01), Freimuth
Gazdecki Randal D.
Larsen Michael R.
Moldovan Peter K.
Rollmann Paul J.
Skibinski John R.
Donovan Lincoln
Eaton Corporation
Moran Martin J.
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