Displacement transducers employing printed coil structures

Details Displacement transducers employing printed coil structures Displacement transducers employing printed coil structures

1979-04-11

1981-02-24

Kozma, Thomas J.

Inductor devices

With electric and/or magnetic shielding means

336136, 336179, 336183, 336200, H01F 2106

Patent

active

042530792

ABSTRACT:
There is disclosed a displacement transducer which comprises a plurality of planar circuit boards, each having a coaxial central aperture. Each of said boards having disposed thereon at least one spiral conductive structure which manifests a predetermined coil. The structure is oriented about the aperture and has a first and second terminal. The boards are positioned in a stacked array with each of said boards separated one from the other and with said central apertures aligned to form a central coaxial cavity. Leads are coupled to the first and second terminals of said boards for connecting certain ones in a primary winding configuration and others in at least two secondary configurations. A magnetic core adapted for insertion into said cavity varies the coupling between the primary and secondary windings according to the depth of insertion of said core within said cavity.

REFERENCES:
patent: 3484697 (1969-12-01), Abend
patent: 3979706 (1976-09-01), Jennings

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