Electronic circuit ensuring protection against electrical discharge, in particular for hairdryers
OwnerGiovanni Gilardoni, Sergio Gilardoniinventors
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Abstract
An electronic safety device, for example for the current feed of a hairdryer or similar domestic electrical appliance, shuts off the appliance in the presence of moisture or water on electrically conducting parts thereby avoiding a dangerous short circuit. A pair of closely spaced grids is provided, each of which is in series between a pair of connection wires that trip a control circuit which normally maintains energized a relay for closing a control switch of an electrical feed line of the appliance. A supplementary control current continuously flows through each grid and its associated wires.
Claims3
An electronic safety device of the type comprising a pair of parallel, slightly spaced-apart metal sensing grids, and an electronic control and tripping circuit which maintains energized a relay for closing a control switch of an electrical feed line, each of the two grids being connected to the electronic control and tripping circuit by a pair of connection wires through which a supplementary control current constantly flows, accidental interruption of one of two circuits each formed by a grid and two respective connection wires causing tripping of said control circuit, each said grid being in series between its associated said two connection wires.
Dependencies are inferred from the claim text.