Electricity: magnetically operated switches – magnets – and electr – Magnets and electromagnets – With magneto-mechanical motive device
Patent
1987-05-06
1988-03-08
Harris, George
Electricity: magnetically operated switches, magnets, and electr
Magnets and electromagnets
With magneto-mechanical motive device
335 85, 335234, 335 79, H01F 708
Patent
active
047301759
ABSTRACT:
A polarized electromagnet device is constructed with a magnetic block movable within a specially designed yoke in response to the attraction forces of permanent magnets and an electromagnetic coil. The movable block and yoke designs form magnetic circuits which result in a relatively large permanent magnet attraction forces on the attraction side of the device and relatively small permanent magnet attraction force on the return side such that a spring load on the return side is not required.
REFERENCES:
patent: 4451808 (1984-05-01), Koehler
patent: 4604599 (1986-08-01), Koehler
Hirota Takato
Ichikawa Haruo
Fuji Electric & Co., Ltd.
Harris George
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