Electronic proximity switch dependent upon a magnetic field

Details Electronic proximity switch dependent upon a magnetic field Electronic proximity switch dependent upon a magnetic field

1986-10-02

1988-01-12

Shoop, Jr., William M.

Electrical transmission or interconnection systems

Switching systems

Condition responsive

324207, 324236, 331 65, H01H 3600, G08B 1326

Patent

active

047193620

ABSTRACT:
A magnetic field dependent electronic proximity switch adapted to be operated by a magnetic trigger, with the switch comprising an HF tank circuit of an oscillator circuit, which tank circuit can be acted upon by the magnetic trigger, the coil arrangement of the oscillator circuit exhibiting a tank circuit coil and a coupling coil and being associated with a magnetizable member which, starting with a specific magnetic field strength is drivable into magnetic saturation by an external magnetic field of the magnetic trigger with undamping of the tank circuit. The magnetizable member includes an amorphous or predominantly amorphous metal band, with the coil arrangement being disposed on a joint bobbin and the metal band being fashioned as a linear strip member or a slotted ring having an opening on a response side of the proximity switch.

REFERENCES:
patent: 3458774 (1969-07-01), Garshelis
patent: 3743853 (1973-07-01), Dittman et al.
patent: 3919629 (1975-11-01), Scruggs
patent: 3935542 (1976-01-01), Buck
patent: 4433309 (1984-02-01), Hermle et al.
patent: 4455528 (1984-06-01), Walker
patent: 4553040 (1985-11-01), Truper et al.
patent: 4583006 (1986-04-01), Okada et al.
patent: 4618823 (1986-10-01), Dahlheimer et al.

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