The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 26, 1999
Filed:
Mar. 27, 1997
Karl E Geisel, Montebello, NY (US);
Andrew Biscamp, Ridgefield Park, NJ (US);
Brad Conway, Harding, NJ (US);
Control Screening L.L.C., Fairfield, NJ (US);
Abstract
The present invention in one embodiment provides a metal detector comprising a coil, a circuit board on which the coil is etched, a digital signal processor, and a warning circuit, and battery power source. When a sufficient amount of metal is near the coil, the digital signal processor activates a device or devices in the warning circuit. In another embodiment the circuit board on which the coil is placed is used in conjunction with a one piece molded housing. In another embodiment the present invention, provides a metal detector comprising an elongated coil etched onto an elongated circuit board. At least one active device, which is part of detection circuitry is also preferably placed on the elongated circuit board. The detection circuitry in one embodiment, includes circuitry which together with the elongated coil forms an oscillator circuit. The elongated covering case in one embodiment is molded substantially seamlessly by blowmold, extrusion, or injection mold.