Actuation device for an electrical appliance
US4914376A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 30, 1988 |
| Grant date | Apr 3, 1990 |
| Priority date | — |
| Expiry date | Mar 30, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/94068
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.