Dust preventing device for electromagnetic contactor

Details Dust preventing device for electromagnetic contactor Dust preventing device for electromagnetic contactor

1992-05-20

1993-08-10

Donovan, Lincoln

Electricity: magnetically operated switches, magnets, and electr

Electromagnetically actuated switches

Multiple contact type

335202, 335201, H01H 6702

Patent

active

052353044

ABSTRACT:
A dust preventing device for an electromagnetic contactor prevents foreign matters accumulated on a foreign matter preventing wall from slipping off the wall due to vibrations of electromagnetic contactor. In a case where an arc extinguishing chamber cover is disposed to cover a fixed contact and a movable contact, and includes a foreign matter preventing wall provided under a gas discharging opening formed on the cover, the foreign matter preventing wall is formed with ribs provided therearound in a shape of an embankment. Therefore, foreign matters having entered through the gas discharging opening can be positively trapped in a hollow portion surrounded by ribs, so that the foreign matters do not fall into the electromagnetic contactor from the foreign matter preventing wall due to vibrations of the contactor.

REFERENCES:
patent: 4506243 (1985-03-01), Okado et al.
patent: 5081436 (1992-01-01), Nishi et al.
patent: 5103198 (1992-04-01), Morel et al.

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