Device for the contactless transmission of electrical energy, in particular for pyrotechnic ignitors or firing devices

A device for the contactless transmission of electrical energy, intended in particular for firing an ignitor connected to a pyrotechic charge, of the type comprising a fixed control primary winding capable of being supplied with alternating current, and a secondary winding connected to the ignitor and mounted on the pyrotechnic charge within a magnetic circuit which is itself enclosed in a protective shield against stray induction currents there being an air gap between said windings, characterized in that the said shield comprises a fixed magnetic screen of saturable iron designed so as to be saturated in the presence of the magnetic control flux generated by the primary winding.