Abstract: A folding frame for an agricultural implement such as a wheel rake. The frame includes ground engaging wheels and two toolbars foldable for operation and for transport. The folding frame is provided flexibility to conform to uneven surfaces, yet stability against the torques and forces of operation. A slidable tongue provides folding action between the transport position and the operating position. A spacing between rear ends of the two toolbars may be altered hydraulically for wider or narrower windrows. A novel caster wheel provides support for the toolbars and is located so that the implement's transport position is narrower than the prior art's.

Abstract: A multisection tandem disk harrow has a frame, a first disk gang, and a second disk gang. The concave sides of the disk blades in the first disk gang face one side of the disk harrow, and the concave sides of the disk blades in the second disk gang face the other side of the disk harrow. The disk blades in the first disk gang are mounted for rotation about a common axis that extends through a center of the disk blades. The disk blades in the second disk gang are mounted for rotation about respective individual axes that are substantially parallel with and spaced apart from each other. The first and second disk gangs are arranged so that the common axis of the first disk gang is nonparallel with the individual axes of the second disk gang. Various frame, support wheels, disk gang, and hitch configurations are also disclosed.

Abstract: Lift wheel structure for an implement includes four bar linkage having a curved lower link connected to the frame closely adjacent a first tool-carrying rank. A caster wheel is supported at the forward end of the linkage for castering in an accommodation area defined by the curved lower link. Plates are bolted to the sides of the lower link and extend along sides of an upper link to a connection with a lift cylinder directly above the upper link. The link and the cylinder closely overlie the frame to limit interference with other components mounted above the frame and to facilitate compact folding of implement sections. Loads, including cylinder lift loads, are transmitted primarily through the lower link. A protected transducer assembly is connected between the lower link and the frame to maximize and linearize transducer response in the depth control range.

Abstract: A phase shifting polygonal transformer or autotransformer for a three phase electrical distribution system is provided, in which the transformer output winding or autotransformer winding is composed solely of three main coils and three auxiliary coils, alternately interconnected in series. The outputs for the transformer/autotransformer are connected to taps in the coils offset from the connections between coils, which eliminates the need for multiple auxiliary coils in each phase. The transformer/autotransformer of the invention is thus much simpler and less expensive to manufacture than a conventional phase shifting transformer or autotransformer, but reduces harmonics just as effectively.