Electricity: magnetically operated switches – magnets – and electr – Permanent magnet-actuated switches
Patent
1988-03-03
1989-04-25
Goldberg, E. A.
Electricity: magnetically operated switches, magnets, and electr
Permanent magnet-actuated switches
340623, H01H 900
Patent
active
048251810
ABSTRACT:
A switching device comprising a reed switch of a normal open type turned on and off by a magnetic field, a fixed bias magnet located in an area where the switch operates stably, and a starting magnet located opposite to the fixed bias magnet with the switch interposed between them and capable of applying a magnetic field, reverse to that of the fixed bias magnet, to the switch. When the starting magnet is carried close to the switch, its a magnetic field overcomes that of the fixed bias magnet to control the switching-on and -off of the switch, and when it is carried remote from the swtich, the fixed bias magnet controls the switching-on and -off of the switch.
REFERENCES:
patent: 3448419 (1969-06-01), Myatt
patent: 3544934 (1969-05-01), Poliakoff
patent: 4107493 (1978-08-01), Nagara et al.
Shipbuilding & Engineering, vol. 18, No. 11/Nov. 1985.
Ichikawa Munehiro
Nagano Suketoshi
Yoneyama Takashi
Donovan Lincoln
Goldberg E. A.
Kabushiki Kaisha Toshiba
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