Koninklijke Philips Corporation N.v.

Gerben Jan Willem Olyerhoek

Fokke Roelof Voorhorst

Robert Godlieb

An electrical appliance for performing a cutting action on hairs present on an area of skin () comprises at least one assembly of a driven internal cutting member () for cutting off the hairs and an external cutting member () which serves for contacting the area of skin () and also for covering and contacting the internal cutting member (). The cutting members () are designed such that friction between them is related to their condition of wear in a predetermined way. Information relating to an actual condition of wear of the cutting members () is determined by measuring a parameter related to the friction between the cutting members () and processing the parameter, and such information is indicated to a user of the appliance.

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Eindhoven, Netherlands

Gerben Jan Willem Olyerhoek