Electricity: magnetically operated switches – magnets – and electr – Electromagnetically actuated switches – Polarity-responsive
Patent
1999-08-13
2000-06-13
Donovan, Lincoln
Electricity: magnetically operated switches, magnets, and electr
Electromagnetically actuated switches
Polarity-responsive
335129, 335130, 335154, H01H 5122
Patent
active
06075429&
ABSTRACT:
A single-pole relay switch capable of effective arc extinction irrespective of the current flowing directions in which the device is connected in a circuit. The switch has a housing and two sets of contacts located in the housing, each set being composed of a fixed contact and a movable contact. A contact carrier is provided to have first and second movable arms which extend commonly from a bridge and are provided respectively with the two movable contacts. An actuator applies a driving force to move the contact carrier between an ON-position of holding the movable contacts simultaneously in contact respectively with the fixed contacts, and an OFF-position of keeping the movable contacts at respective opening gaps from the fixed contacts. The housing includes a casing which is divided into first and second chambers respectively for receiving the contact sets, each of the first and second chambers being surrounded by a dielectric wall. Permanent magnet are disposed around the casing to stretch the individual arcs in opposing directions to each other and towards the dielectric walls of the first and second chambers, respectively. Thus, the individual arcs can be stretched individually within the separate chambers, i.e., in an isolated condition. Therefore, the individual arcs can be free from merging even when the current flows in such a direction as to drive the arcs in the approaching direction.
REFERENCES:
patent: 5519370 (1996-05-01), Perreira et al.
patent: 5546061 (1996-08-01), Okabayashi et al.
patent: 5554962 (1996-09-01), Perreira et al.
patent: 5831502 (1998-11-01), Kirsch
patent: 5892194 (1999-04-01), Uotome et al.
patent: 5903201 (1999-05-01), Reiss
Hoshino Narutoshi
Ito Masahiro
Toguchi Takehiko
Uotome Riichi
Yamamoto Ritsu
Donovan Lincoln
Matsushita Electric & Works Ltd.
Nguyen Tuyen T.
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