Polarized electromagnetic relay

Details Polarized electromagnetic relay Polarized electromagnetic relay

H - Electricity

01

H

306/103

H01H 51/22 (2006.01)

Patent

CA 1139807

Abstract of the Disclosure A polarized electromagnetic relay includes two contact springs extending substantially parallel to each other. One of the contact springs forms a movable contact for cooperation with a fixed contact. In the contacting condition, the free ends of the contact springs touch each other. A first actuator portion of a relay armature serves to move the contact springs into the contacting position, and a second actuator portion serves to move the contact springs in the opposite direction to open the contact. The ratio of the spring lengths between the second actuator portion and the movable contact, divided by the thickness of this length of contact spring is smaller than the ratio of the spring lengths between the first actuator portion and the touching location of the two contact springs, divided by the thickness of this length of contact spring. A contact spring arrangement is thereby achieved in which an essential portion of the permanent-magnetic pull of the armature is stored in the contact springs as the contact force. At the same time, a positive and forced contact opening is achieved with a contact clearance unaffected by contact spring bending.

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