Communications: electrical – Condition responsive indicating system – Specific condition
Patent
1991-10-31
1993-10-26
Mullen, Thomas
Communications: electrical
Condition responsive indicating system
Specific condition
137554, 3242072, 32420722, G08B 2100, G01B 714
Patent
active
052570142
ABSTRACT:
An electromagnetic actuator is disclosed. The actuator includes a core, and a cylindrical shell disposed around the core defining an annular space therebetween. A signal device produces a desired position signal. A direct current amplifier transmits an energization signal in response to the desired position signal. A coil disposed in the annular space has a plurality of windings. The coil is adapted to receive the energization signal and responsively produce a magnetic field about the coil proportional to the magnitude of the energization signal causing one of the coil and the core to move relative to the other. A sensing device is adapted to detect the magnetic field produced by the energized coil. The sensing device responsively produces a sensed position signal correlative to the magnitude of the magnetic field. A signal conditioning circuit receives the sensed position signal and responsively produces an actual position signal indicative of the position of the moving one of the coil and the core relative to the other of the coil and the core.
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Aura Systems, Inc., The Aura Systems High Force Actuator, El Segundo, Calif., Jun. 1990.
Caterpillar Inc.
Masterson David M.
Mullen Thomas
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