Automatic height control for a harvester header

Details Automatic height control for a harvester header Automatic height control for a harvester header

A - Human Necessities

01

D

56/33, 341/97

A01D 75/00 (2006.01) A01D 41/14 (2006.01) H01H 19/12 (2006.01)

Patent

CA 1160326

AUTOMATIC HEIGHT CONTROL FOR A HARVESTER HEADER Abstract of the Disclosure A self-propelled combine harvester is equipped with a grain cutting platform having a floating, flexible cutter bar. The operating height of the grain platform is controlled convention- ally by hydraulic cylinders. An automatic operating mode may be chosen in which the hydraulic cylinders are responsive to a signal corresponding to vertical disposition of the floating cutter bar relative to the floor of the platform. The automatic control system includes a sealed self-contained position sensor switch module directly coupled to a sensor rock shaft whose rotational position in the platform frame is representat??e of the disposition of the cutter bar relative to the platform floor. The sensor switch module includes a segmented printed circuit board and an associated wiper arm with a brush assembly, directly coupled to the sensor shaft. Selector switching means includes a rotary switch at the operator station which the operator can set to control the platform at any one of three operating height set points. A mechanical float range indicator is optionally provided.

383796

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