Thermal overload relay

Details Thermal overload relay Thermal overload relay

1979-04-06

1981-05-26

Broome, Harold

Electricity: electrothermally or thermally actuated switches

Electrothermally actuated switches

With bimetallic elements

337359, H01H 7116

Patent

active

042701139

ABSTRACT:
A thermal overload relay characterized by a housing containing a plurality of pole units, two pairs of spaced terminals on the housing, one terminal of each pair comprising a stationary contact within the housing, a movable contact mounted on and extending from the other of each terminal and being biased in one of the open and closed positions of the stationary contact, a slide within the housing for moving the movable contact between said positions, latch means on the slide for latching the slide in one of said positions and being spring biased in the other position, reset means for moving the slide to a latched position, each pole unit having a bimetal element responsive to current flow to effect heating thereof, and means associated with the latch means for unlatching the latch means.

REFERENCES:
patent: 3265831 (1966-08-01), Ramsey et al.
patent: 3792401 (1974-02-01), Anderson
patent: 3842383 (1974-10-01), Anderson et al.
patent: 4047140 (1977-09-01), Anderson et al.

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