Control device for an electrical appliance
AssigneeE.G.O. Elektro-Geraetebau GmbH
InventorMartin Baier
Life of this patent
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Abstract
A control device for an electrical appliance has as an operating unit comprising a rotary knob having an electrical display. The rotary knob is mounted on a rotary shaft connected to a switching device for rotary operation, wherein the rotary shaft comprises a material readily conducting magnetic field lines. An inductive energy supply is provided for the electrical display, wherein a secondary winding is arranged inside the rotary knob whose winding plane is passed through by the rotary shaft and the magnetic field lines of a primary winding. The primary winding is arranged behind the cover of the electrical appliance, and a winding plane of the primary winding is passed through by the rotary shaft.
Claims12
A control device for an electrical appliance comprising an operating unit designed as a rotary knob and mounted on a rotary shaft passing through a cover of said electrical appliance,
- wherein said rotary shaft is connected to a switching device for rotary operation using said rotary knob,
- wherein electrical display means are arranged inside said rotary knob,
- wherein an inductive energy supply to said display means is provided having a primary winding and a secondary winding,
- wherein said secondary winding is arranged inside said rotary knob whose winding plane is passed through by said rotary shaft and magnetic field lines coming from said primary winding,
- wherein said rotary shaft comprises a material for conducting field lines that readily conducts said magnetic field lines, and
- wherein said primary winding is arranged behind said cover of said electrical appliance and a winding plane of said primary winding is passed through by said rotary shaft.
Dependencies are inferred from the claim text.