Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – With magneto-mechanical motive device
Patent
1994-10-11
1995-06-27
Picard, Leo P.
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
With magneto-mechanical motive device
335250, 335277, 335282, H01F 710
Patent
active
054283302
ABSTRACT:
A magnet switch for a starter device includes a plunger on which a sufficient pull force can be exerted. The plunger drives a movable contact, and is guided by a sleeve so as to move therealong. An excited coil wound on a bobbin is provided around an outer periphery of the sleeve. The exciting coil is covered by a cylindrical frame of a magnetic material, and a bottom plate portion of the frame has an opening fitted on the outer periphery of the sleeve. A cushion spring is interposed between the bottom plate portion of the frame and the bobbin to hold the exciting coil in a predetermined position. The cushion spring has an annular portion disposed in contact with the bottom plate portion and the outer periphery of the sleeve, and a magnetic path can be formed between the annular portion and the plunger.
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Journal of Nippondenso Technical Disclosure, May 15, 1984, Ref. 35-091, Magnet Switch, Hirama Kazuo.
Nippondenso Co. Ltd.
Picard Leo P.
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