Stone detector for field chopper

Details Stone detector for field chopper Stone detector for field chopper

1986-10-02

1988-10-11

Hirsch, Paul J.

Harvesters

Motorized harvester

With condition-responsive operation

56DIG15, A01D 7518, A01F 2916

Patent

active

047761547

ABSTRACT:
An agricultural machine has a machine frame adapted to move along the ground in a normal travel direction, a crop cutter on the front of the frame, and a crop comminuter carried on the frame behind the cutter. An intake device including a generally fixed feed element on the frame and another feed element displaceable on the frame toward and away from the fixed feed element is operated by a stoppable drive connected to the fixed feed element to feed the cut crop as a stream back in the transport direction to the comminuter. The displaceable element compacts the stream of cut crop against the fixed feed element. An accelerometer is connected between the displaceable feed element and the frame for joint displacement with the displaceable feed element and generates an output corresponding to acceleration of the displaceable feed element toward and away from the fixed element. The machine may also have an alarm. A controller connected between the accelerometer and the drive and/or the alarm stops the feed and/or sounds the alarm when the output exceeds a predetermined limit indicating presence of a massive object between the elements.

REFERENCES:
patent: 3896608 (1975-07-01), Garrott
patent: 4261161 (1981-04-01), Colgrove et al.
patent: 4296591 (1981-10-01), Martenas et al.
patent: 4322937 (1982-04-01), Hollmann
patent: 4344074 (1982-08-01), Strosser et al.
patent: 4433528 (1984-02-01), Bohman
patent: 4531118 (1985-07-01), Beams

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