Harvesters – Motorized harvester – With condition-responsive operation
Patent
1980-09-26
1982-04-06
Hafer, Robert A.
Harvesters
Motorized harvester
With condition-responsive operation
56DIG15, 324236, A01D 6910
Patent
active
043229379
ABSTRACT:
A harvester of the type comprising a pick-up mechanism operative to gather harvested material from the ground and to supply the same to a conveying structure within the harvester is further provided with a metal detector located within the harvester between the pick-up mechanism and conveying structure. The metal detector comprises a non-conductive shield structure which is disposed adjacent the path of movement of material passing from the pick-up mechanism to the conveying structure and arranged to provide a surface over which said material passes, and sensor means mounted within the shield structure and operative to produce a field which penetrates said surface and extends transversely across the path of movement of material being supplied by the pick-up mechanism to the conveying structure. The sensor means preferably operates to generate a high frequency oscillating field which is interrupted by the presence of metal objects in the material being fed to the conveying structure, with the field interruption producing a signal which shuts the harvester down.
REFERENCES:
patent: 3656284 (1972-04-01), Meek et al.
patent: 3889249 (1975-06-01), Bennett et al.
patent: 3959953 (1976-06-01), Garrott
patent: 3972156 (1976-08-01), Bennett et al.
patent: 3996510 (1976-12-01), Guichard
Claas OHG
Hafer Robert A.
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