Oscillator coil sensing head for contactless inductive proximity

Details Oscillator coil sensing head for contactless inductive proximity Oscillator coil sensing head for contactless inductive proximity

1981-07-20

1984-06-19

Grimm, Siegfried H.

Electricity: measuring and testing

Of geophysical surface or subsurface in situ

For small object detection or location

324236, 331 65, 331108D, 336 83, G01R 3312

Patent

active

044555288

ABSTRACT:
A contactless inductive proximity switch contains an oscillator which is formed of a parallel arrangement of an oscillator coil and an oscillator capacitor connected to an integrated circuit. The oscillator coil is provided with a relatively few number of wire turns so as to occupy a relatively small portion of the volume in the cup core. The capacity of the oscillator capacitor is selected to match the oscillator coil. A hard water is retained within the cup core by a casting resin, and protects the oscillator coil from damage.

REFERENCES:
patent: 3743853 (1973-07-01), Dittman et al.
patent: 3996510 (1976-12-01), Guichard
Siemens AG, "Bauelemente furinductive Naherungsschalter" Datenbuch 1976/77, pp. 2, 3, 14-23.
Siemens AG, "Lineare Schaltungen", Datenbuch 1979/80, pp. 166-167.

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