Search coil assembly for metal detectors

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

1988-06-14

1989-03-21

Kozma, Thomas J.

Inductor devices

With electric and/or magnetic shielding means

29605, 324239, 336 96, H01F 1504, H01F 2702

Patent

active

048147346

ABSTRACT:
A coil assembly for a metal detector of the type used for detecting metal fragments in foodstuffs and pharmaceuticals, the assembly comprising a frame of non-metallic material, the frame have an aperture therethrough for the passage of material undergoing inspection, a coating of carbon material applied to the exterior of the frame, a layer of plastic material applied over the carbon material, electrically conductive strands wound over the plastic material, the frame being fixed to a rigid metal housing providing an enclosed void around the exterior of the coated frame and strands, and foam plastic enveloping the frame and strands, the void being filled with the foam plastic.

REFERENCES:
patent: 2237254 (1941-04-01), Broekhuysen
patent: 3361962 (1968-01-01), Albrecht
patent: 3368175 (1968-02-01), Giegerich et al.

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