Polarized electromagnetic relay

Details Polarized electromagnetic relay Polarized electromagnetic relay

1980-01-24

1982-04-06

Broome, Harold

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

For relays or solenoids

335194, 335192, 335 78, H01H 5122, H01H 5130

Patent

active

043239455

ABSTRACT:
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.

REFERENCES:
patent: 2833885 (1958-05-01), Wells et al.
patent: 3634793 (1972-01-01), Sauer
patent: 4087667 (1978-05-01), Heider et al.
"Relais Lexikon", by H. Sauer, 1975, p. 12.
"Publication Elektronik", vol. 60, Issue 24 of Dec. 27, 1978, p. 43.

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