Abstract: The invention relates to a moving-armature electro-magnetic device such as a plunger core electromagnet wherein a ring of a non-magnetic material with an appropriate anti-friction coefficient is placed between the armature and the seat which cooperates with said armature. Said ring permits to reduce to a minimum both the frictional forces and the remanence forces between said armature and said seat.
Type:
Grant
Filed:
July 31, 1978
Date of Patent:
December 4, 1979
Assignee:
Techniques Europeennes de Commutation (T.E.C.)