Abstract: A shaft-carried speed reducer is provided having an adaptable mounting arrangement. The hub of the speed reducer is configured having a substantially cylindrical axial bore. At least one annular groove may be defined in the axial bore to receive a snap ring when desired. A removable adapter having a tapered interior surface may then be situated in the hub bore to abut the snap ring. As an alternative to such a snap ring, an annular flange may be provided on the removable adapter to engage an end face of the hub. A tapered sleeve member engages the tapered interior surface defined on the removable adapter to effect securement of the hub to the shaft. If a single adapter is used, it may be inserted from either side of the hub in some configurations. Further, some configurations permit a pair of adapters and corresponding sleeve members to be used. The adapter and snap ring, if any, may be removed when the hub is to be secured to a screw conveyor drive shaft or the like.

Abstract: A device and method is provided for filtering frequency components of an electrical signal above a selectable low pass cutoff frequency which is changeable within a designated range. An input filter having a fixed low pass cutoff frequency provides aliasing protection for a first of at least three clock driven filter stages respectively having variable low pass cutoff frequencies proportional to a clock rate of a received clock signal. The overall selectable low pass filter is determined at an intermediate stage of the clock driven filter stages. Clock rates of respective clock signals applied to clock driven stages proceeding the intermediate stage having the selectable cutoff frequency are adjusted so that each provides aliasing protection for the next. Similarly, the low pass cutoff frequencies of clock driven filter stage succeeding the intermediate stage having the selectable cutoff frequency are adjusted to eliminate staircasing distortion in the output signal.