Electromagnetic switching device having an improved energizing c

Details Electromagnetic switching device having an improved energizing c Electromagnetic switching device having an improved energizing c

1974-12-18

1976-03-09

Miller, J. D.

H01H 4704

Patent

active

039434168

ABSTRACT:
An electromagnetic switching device having an improved circuit for effecting energization and operation of the device. The device is comprised of a stationary magnetic member, a movable magnetic member in juxtaposition with the stationary magnetic member, and energizing coil magnetically coupled to the stationary and movable magnetic members, at least one stationary contact, and at least one movable contact in juxtaposition with the stationary contact and mechanically coupled to the movable magnetic member. The device is further comprised of full wave rectifying means for converting AC voltage from a source to DC voltage and applying the DC voltage across the energizing coil. Means responsive to movement of the movable magnetic member is further provided for converting the full wave rectifying means to half-way rectifying means to reduce the applied DC voltage across the energizing coil after the movable magnetic member has moved the movable contact into initial electrical contact with the stationary contact and before the movable and stationary contacts are brought into final sealed engagement.

REFERENCES:
patent: 3140429 (1964-07-01), Mais

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