Speed-independent static magnetic field metal detector

Details Speed-independent static magnetic field metal detector Speed-independent static magnetic field metal detector

1975-02-24

1976-08-03

Kinsey, Russell R.

Harvesters

Motorized harvester

With condition-responsive operation

130 27JT, 324 41, 340258B, 56DIG15, A01D 6910

Patent

active

039721566

ABSTRACT:
A static magnetic field detector for harvesting machines senses the passage of ferrous or magnetic objects utilizing a balanced magnetic field excitation configuration which provides substantial self-cancellation of spurious background signals. A novel filtering means provides normalization of the fluctuations in the background noise due to the variations in the angular velocity of the rotating harvesting machine components. Additionally, the detector apparatus is disposed within a compressor feed roll of the machine thereby reducing the area which must be scanned and increasing the sensitivity of the device.

REFERENCES:
patent: 3530650 (1970-09-01), Phillips
patent: 3597755 (1971-08-01), Parkin
patent: 3697972 (1972-10-01), Brown
patent: 3757501 (1973-09-01), Bennett, Jr. et al
patent: 3758849 (1973-09-01), Susman et al.
patent: 3889249 (1975-06-01), Bennett, Jr. et al.

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