Search coil assembly for metal detectors

Details Search coil assembly for metal detectors Search coil assembly for metal detectors

1989-05-30

1990-02-20

Kozma, Thomas J.

Inductor devices

With electric and/or magnetic shielding means

174 35MS, 324239, 336 92, 336 96, 336208, H01F 1504

Patent

active

049029975

ABSTRACT:
A coil assembly for a metal detector of the type used for detecting metal fragments in foodstuffs and pharmaceuticals, the coil assembly comprising a frame of non-metallic material, the frame having an aperture therethrough for the passage of material undergoing inspection, coils of electrically conductive strands wound upon the frame, a first plastic coating adhered to the frame and coils, less the aperture portion of the frame, a layer of metal adhered to the first plastic coating to encase the first plastic coating in the metal layer, and a second plastic coating adhered to the metal layer to encase the layer in the second plastic coating.

REFERENCES:
patent: 2237254 (1941-04-01), Broekhuysen
patent: 2628342 (1953-02-01), Taylor
patent: 2705292 (1955-03-01), Wagenseil
patent: 3213173 (1965-10-01), Cobb
patent: 3278455 (1966-10-01), Feather
patent: 3361962 (1968-01-01), Albrecht
patent: 3368175 (1968-02-01), Giegerich et al.
patent: 4683454 (1987-07-01), Vollmer et al.

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