Pumps – Motor driven – Including means for selectively varying motor speed or...
Patent
1995-01-23
1996-11-12
Thorpe, Timothy S.
Pumps
Motor driven
Including means for selectively varying motor speed or...
416247R, 200 52R, F04B 1700
Patent
active
055733824
ABSTRACT:
A multi-speed electric fan comprising a fan assembly, a variable power controller and an electrostatically actuated signal generator. The fan assembly includes an electric fan motor having a pair of power supply inputs. The variable power controller has a pair of power inputs, a pair of power outputs, and an actuating signal input. The actuating signal controls the power output of the variable power controller. The signal generator preferably includes a conducting plate, having an insulated conducting lead, and an isolation housing, having an open top. The conducting plate is installed within the isolation housing in a manner such that the conducting plate is electrically isolated from the housing of the fan assembly and the conducting lead is in electrical connection with the signal generator. The isolation housing preferably includes an aperture through a section thereof of a size sufficient to allow the insulated conducting lead to pass therethrough and includes a recessed, conducting plate receiving notch located adjacent a peripheral lip of the isolation housing. The conducting plate is preferably a substantially rectangular shaped metal plate having rounded corners.
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Breaux Joseph N.
Thai Xuan M.
Thorpe Timothy S.
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