Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – Multiple contact type
Patent
1982-10-22
1984-05-01
Broome, Harold
Electricity: magnetically operated switches, magnets, and electr
Electromagnetically actuated switches
Multiple contact type
335196, 335203, H01H 5108
Patent
active
044464495
ABSTRACT:
A relay having a plunger-type armature is provided with a magnetic circuit having two serial air gaps arranged for additively applying a magnetic force to the armature in a direction substantially parallel to the longitudinal extent of its plunger to provide the requisite endwise motion to the armature. In addition to a relatively conventional air gap between the inner end of the armature and a base terminal included in the magnetic circuit, a second air gap is also provided between an armature flange and the bight of a ferromagnetic U bracket about the coil. The armature flange comprises a relatively large area extending transversely of the outer end of the armature plunger and over the U bracket bight portion. The length of the armature plunger from the underside of the flange is such that the flange comes into contiguous, but not contacting, relation with the U bracket's bight portion upon movement of the armature to its actuated position. A nonmagnetic armature stop is affixed to the U bracket for defining the at-rest position of the armature, and thus defining the air gaps. The armature stop may also serve as a support for a contact.
REFERENCES:
patent: 4003011 (1977-01-01), Hayden
patent: 4044322 (1977-08-01), Brown et al.
patent: 4064470 (1977-12-01), Hayden
patent: 4356466 (1982-10-01), Brown et al.
Andrews George
Broome Harold
Essex Group Inc.
Schneeberger Stephen A.
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