Inductive proximity switch

Details Inductive proximity switch Inductive proximity switch

1983-07-06

1985-11-12

Pellinen, A. D.

Electrical transmission or interconnection systems

Switching systems

Condition responsive

340551, 361180, 336 96, H01H 3500

Patent

active

045530408

ABSTRACT:
The invention relates to an inductive proximity switch having a feeler head with a feeler coil as a component of an LC oscillator circuit of a high frequency oscillator, the feeler head serving to generate a directionally oriented, alternating magnetic field, whereby the feeler coil of the feeler head is coupled with a closed circuit loop comprising an inductance and an ohmic resistance such that the oscillator is damped when the field is undisturbed and its damping is reduced when the field is disturbed by a nonmagnetic object such that an oscillation occurs.

REFERENCES:
patent: 2983852 (1961-05-01), Gray
patent: 3469204 (1969-09-01), Maggar et al.
patent: 3601620 (1971-08-01), Gee
patent: 3601691 (1971-08-01), Gardiner
patent: 3732503 (1973-05-01), Rapp et al.
patent: 3743853 (1973-07-01), Dittman et al.
patent: 3747010 (1973-07-01), Buck
patent: 3764819 (1973-10-01), Muller
patent: 3872398 (1975-03-01), Fausone et al.
patent: 4323847 (1982-04-01), Karbowski
patent: 4419646 (1983-12-01), Hermle

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