Abstract: An improved arrangement of locking apparatus for securing the fulcrum ring of a clutch in adjusted position includes a rotatable cam operable from a readily accessible location for forcing a locking bar radially into engagement with a slotted fulcrum ring; a wedge shaped nose on the locking bar is preferred for taking up clearance between the bar and slot in order to eliminate hammering or chucking; the nose of the locking bar may have compound inclination for exerting wedging action both radially and parallel to the axis; the wedging and securing of the locking bar is facilitated by the provision of coaxial hexagonal drive lugs adapted for engagement by wrenches. In addition, an improved interlocking drive connection is provided between the finger of a belleville spring and a release sleeve assuring that the sleeve rotates with the spring.

Abstract: A friction clutch is provided with an improved connection for the release levers including an opening in the lever provided with a longitudinally extending sharp knife-edge for cooperating with a longitudinally extending pivot axis formed on an integral support means associated with one of the elements of the clutch. The integral support means and lever openings are constructed in such a manner as to positively constrain the levers in both a radial and circumferential direction with respect to the associate clutch element.

Abstract: A dual clutch, e.g. for agricultural tractors having separate wheel and power take off drives, has a driving plate spaced from a flywheel with two pressure plates interposed. A single Belleville spring clamps one driven plate between one pressure plate and the flywheel and the other driven plate between the other pressure plate and the driving plate. A plurality of release levers pivot on the driving plate to each operate the one pressure plate through a link and the other pressure plate through an adjustable toggle mechanism. The driven plates may drive the same shaft.

Abstract: A friction plate clutch for attachment to an internal combustion engine is protected against vibration induced wear of loosely interfitted parts thereof by spring devices which keep the parts yieldingly in firm contact with each other.

Abstract: Individual seed meter drive shaft engagement mechanisms are provided for each seed meter to enable quick and simple coupling of the planter drive train to each seed meter. A slidable coupler mechanism is biased towards engagement and has locking assembly for securing the coupler in either a disengaged or engaged position. The mechanism is provided horizontal with the seed meter to enable simple seed meter removal for cleaning or changing of seed.