Metal detection device

Details Metal detection device Metal detection device

2005-06-03

2010-02-16

Whittington, Kenneth J (Department: 2858)

Electricity: measuring and testing

Magnetic

With means to create magnetic field to test material

C324S326000

Reexamination Certificate

active

07663361

ABSTRACT:
A metal detection device is capable of effectively detecting a metal mixed in food or the like by generating AC magnetic field simultaneously tuned to respective frequencies by a single transmission coil in response to frequency components of different frequencies without switching an element by a switch or the like. Constituent elements constituting magnetic field generation portion are connected so that a transmission coil L1and a capacitor C1resonate in the first frequency F1. Moreover, constituent elements are connected so that the transmission coil L1and a capacitor C2resonate in the second frequency F2. Furthermore, constituent elements function so as to effectively separate the capacitor C1and capacitor C2so that they do not interfere at least in the same frequency.

REFERENCES:
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patent: 6724191 (2004-04-01), Larsen
patent: 6967574 (2005-11-01), Nelson
patent: 53-23250 (1978-03-01), None
patent: 63-41502 (1988-08-01), None
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Super Mepoli II “The Metal Detection Machine”, Anritsu, pp. 69-75.

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