Electronic circuit ensuring protection against electrical...

Details Electronic circuit ensuring protection against electrical... Electronic circuit ensuring protection against electrical...

H - Electricity

02

H

317/11

H02H 5/00 (2006.01) H02H 5/08 (2006.01)

Patent

CA 1288462

ABSTRACT OF THE DISCLOSURE This invention relates to an electronic control circuit ensuring protection against short-circuiting and especially against electrical discharge, in particular in domestic electrical appliances such as hairdryers. This circuit comprises a pair of parallel, slightly spaced- apart metal sensing grids disposed in correspondence with each aperture of the appliance, and an electronic control and tripping circuit which maintains energized a relay for closing a switch connected into the electricity feed line. Each of the two grids is connected to the electro- nic control and tripping circuit by a pair of conductor wires through which a supplementary control current constantly circulates, accidental interruption of one of the two circuits each formed by a grid and the two respective connection wires causing tripping of the control circuit.

517676

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