Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – Multiple contact type
Patent
1990-04-12
1991-06-18
Picard, Leo P.
Electricity: magnetically operated switches, magnets, and electr
Electromagnetically actuated switches
Multiple contact type
335 83, H01H 6702
Patent
active
050252380
ABSTRACT:
An electromagnetic relay, comprising: a electromagnet consisting of an iron core and a solenoid wound thereon; a yoke extending in parallel with the electromagnet and attached to one end of the iron core; an armature pivotally attached to a part of the yoke adjacent to another end of the iron core at its base end; a fixed contact unit provided adjacent to the electromagnet; an pivotally supported moveable contact carrier; an extension arm extending from the armature and having a free end adapted to abut an actuation point of the moveable contact carrier located between its pivoted point and a moveable contact piece carried thereby; the moveable contact piece being adapted to cooperate with a fixed contact member provided in the fixed contact unit. The lever ratio achieve by the moveable contact carrier permits the magnetic gap between the armature and the iron core to be reduced, and the actuation stroke of the contact mechanism to be increase, in a relative sense, so that the magnetic efficiency can be increased and the reliability of the contact mechanism can be ensured.
REFERENCES:
patent: 4020434 (1977-04-01), Jaegle et al.
patent: 4309682 (1982-01-01), Arnoux et al.
Hori Mitukazu
Matuo Ken-iti
Nakata Muneo
Tanihara Isaji
Donovan Lincoln
Omron Tateisi Electronics Co.
Picard Leo P.
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