Electricity: power supply or regulation systems – External or operator controlled – Using an impedance as the final control device
Patent
1988-03-30
1990-04-03
Gellner, Michael L.
Electricity: power supply or regulation systems
External or operator controlled
Using an impedance as the final control device
323368, 338 32R, G05B 2402
Patent
active
049143760
ABSTRACT:
The invention is directed to an actuation device for an electrical appliance, in particular for small electrical appliances such as tooth-brushes, oral jet devices, hair dryers, curling irons, shavers and food processors, for the open- or closed-loop control of at least one operating quantity, including a primary detector for generating controlled variables and a circuit arrangement. The actuation device is characterized in that the primary detector includes a movable element which is arranged at the electrical appliance and produces magnetic or electric fields of varying field strengths in dependence on its position, and further includes an element fixedly disposed on the electrical appliance and sensitive to magnetic or electric fields. The field-sensitive element produces an output quantity which is a measure of the field strength at the site of the field-sensitive element, the output quantity is deliverable to the circuit arrangement, and the circuit arrangement incorporates at least one control function which in turn operates on the operating quantity of the electrical appliance.
REFERENCES:
patent: 3366909 (1968-01-01), Hini et al.
patent: 3622922 (1971-11-01), Mogi
patent: 4578624 (1986-03-01), Neki et al.
patent: 4733214 (1988-03-01), Andersen
patent: 4812804 (1989-03-01), Masaki
Braun Aktiengesellschaft
Gellner Michael L.
Gray David M.
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