Abstract: An unloader position control switch assembly is positioned along the pivot axis of an unloader tube and is provided with a downwardly depending key that engages a slot formed in a pivot pin fixedly secured to the unloader tube. The switch assembly has two switch elements that are mechanically interconnected and are automatically resettable after the unloading tube substantially reaches either the storage position or the unloading position for the unloading tube. An operator's switch is interconnected with the control switch assembly so that an operator may easily manipulate the positioning of the unloader tube.

Abstract: An agricultural combine is provided with electronic controller cards for assisting in controlling and monitoring the combine. The cards are housed in an enclosure located adjacent to the operator's cab above the ground engaging wheels. The enclosure comprises a box mounted in an aperture formed in the supporting structure and a cover which can be latched to the box. The cover is provided with a number of inwardly extending fingers each having a receiving groove for holding the electronic controller cards. The fingers are arranged in pairs for engaging the cards between the fingers. Openings in the cover are located adjacent to each finger pair for providing an opening through which the electronic controller car held therein can communicate with the wiring harness of the combine. Each opinion is provided with an outwardly extending and encircling flange which engaged a rubber boot of the wiring harness.

Abstract: An automatic attitude control system is disclosed for a harvester having a crop pickup connected for pivoting about a transverse axis near the forward end of a crop-gathering head. The system automatically raises or lowers the crop-gathering head to maintain the angle between the upper run of the pickup belt or conveyor and the head within preselected angular limits to assure proper feeding of the crop from the pickup to a transverse auger or the like on the head. Two sensors are provided, each with a plurality of reed switches, including a group of parallel "raise" switches and a group of parallel "lower" switches, and a magnetic actuator mounted for relative movement with respect to the switches as the pickup pivots with respect to the head. The sensor switches are connected to a circuit for activating a control valve for the head cylinders to raise the head when one or more of the switches in either of the "raise" groups are closed by the actuator.