Electricity: electrical systems and devices – Control circuits for electromagnetic devices – Systems for magnetizing – demagnetizing – or controlling the...
Reexamination Certificate
2011-04-26
2011-04-26
Patel, Dharti H (Department: 2836)
Electricity: electrical systems and devices
Control circuits for electromagnetic devices
Systems for magnetizing, demagnetizing, or controlling the...
C361S147000, C361S160000
Reexamination Certificate
active
07933109
ABSTRACT:
Disclosed is an electromagnetic switching device including a number of fixed contact pieces, a solenoid-operated mechanism, a contact support which can be moved counter to restoring devices in at least one embodiment, with the aid of the solenoid-operated mechanism and on which a number of movable contact pieces are arranged, and an off stop for the contact support. A sensor is provided, in at least one embodiment, for detecting the position of the contact support while a control unit is provided which is connected to the sensor and regulates and/or controls the solenoid-operated mechanism during a switch-off process in order to decelerate the contact support before the same hits the off stop. Also disclosed is a method for operating such a switching device. The contact support, in at least one embodiment, transmits only a small momentum to the off stop, thus reducing the load applied to the involved parts. Such a switching device therefore has a longer service life than conventional switching devices.
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PCT/ISA/210.
Office Action for Chinese patent application No. 200580050168.2 dated Apr. 21, 2010.
Mitlmeier Norbert
Runggaldier Diethard
Harness & Dickey & Pierce P.L.C.
Patel Dharti H
Siemens Aktiengesellschaft
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