Metal detector for detecting metal in harvested product flow

Details Metal detector for detecting metal in harvested product flow Metal detector for detecting metal in harvested product flow

1997-05-20

1999-05-11

Shackelford, Heather

Harvesters

Motorized harvester

With condition-responsive operation

56DIG15, A01D75/18

Patent

active

059015349

ABSTRACT:
A metal detector for detecting metal in a harvested product flow has a plurality of permanent magnets for producing a magnet field which passes through a harvested product flow region, a plurality of coils associated with the permanent magnets so that when a foreign body passes through the magnet field useful signals are produced, a signal processing unit operative for processing of the produced useful signals, a plurality of amplifiers and filters each connected to a respective one of the coils, a plurality of threshold value switches each connected with respect to one of the amplifiers and the filters and having output, an OR-circuit connected with the outputs of the threshold values, and stopping mechanisms connected with the OR-circuit.

REFERENCES:
patent: 3889249 (1975-06-01), Bennett, Jr. et al.
patent: 3972156 (1976-08-01), Bennett, Jr. et al.
patent: 5078645 (1992-01-01), Bohman et al.
patent: 5343676 (1994-09-01), Weiss
patent: 5600942 (1997-02-01), Strosser
patent: 5627475 (1997-05-01), Strosser

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