H - Electricity – 01 – F
Patent
H - Electricity
01
F
336/48, 340/124.
H01F 5/00 (2006.01) G08B 13/14 (2006.01) G08B 13/24 (2006.01) H01F 17/02 (2006.01) H01F 17/04 (2006.01)
Patent
CA 1210465
ABSTRACT OF THE DISCLOSURE A coil assembly for use in a communications system is essentially isotropic in a plane normal to the plane of the coil and includes two flat coils stacked one next to the other. One coil is connected in series with a resistor in a closed loop and has a strip of high permeability material woven through it. The other coil is tuned by a parallel capacitor across its coil terminals, such terminals being connected to electronic circuitry. The coil is separated from the printed circuit board that contains the electronic circuitry by a sheet of high permeability material. The assembly is self-contained and powered by a flat battery on which the circuit board is placed. Another embodiment is disclosed that contains only one coil, the terminals of which are connected to a suitable electronic circuit, not shown. Strips of high permeability material are disposed on both sides of the coil and an assembly is produced with a printed circuit board and a flat battery.
424471
Barrett Raymond L. Jr.
Gross Thomas A.o.
Pfister Henry F.
Sensormatic Electronics Corporation
Smart & Biggar
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