Abstract: A stroke adjustment for reciprocating mechanisms which includes an external adjusting wheel to vary internally the longitudinal position of a carrier through an interconnected shaft and gear. A butterfly arm is pivotally connected to the power shaft and is pivoted by the carrier to raise or lower one end of a connected crank to vary the length of the piston stroke by changing the eccentricity of the crank.

Abstract: A speed reducer comprising a worm gear of the type suitable for driving proportioning pumps. The worm is rotated by an input shaft which is suitably journalled within a speed reducer housing wherein the input shaft bearings are respectively carried within aligned housing openings. Either one of the input shaft bearings is adjustable by means of a threaded hole in the housing where the input shaft is inserted. A threaded adjusting piece is screwed against the race of one of the bearings that hold the input shaft to precisely adjust the longitudinal alignment of the worm relative to the gear and to precisely load the two bearings that hold the input shaft to substantially eliminate excessive wear, vibration and chatter.

Abstract: A farm pump mounting bracket comprising a split arm assembly suitable to adjustably support a mounting plate for pump supporting purposes. An adjustable safety retainer interconnects the housing of the farm pump with a portion of the body of the drive motor to prevent unrestricted mounting plate rotation in the event of drive belt failure. The bracket is sturdily constructed and employs a minimum number of operating parts.