Abstract: Disclosed is a stepless speed change gear including a plurality of conical rollers each of which is provided with a conical surface frictionally engaging with a ring-member moved by a speed changing assembly. A surface of concave cross-section frictionally engages with a sun-member on an input shaft, and a flat surface frictionally engages with a non-rotatable disc member. A gear train is provided to extend the speed range to include a speed ratio of 1:1. A release mechanism is provided for the non-rotatable disc member, and a clutch mechanism is provided for direct coupling of the input and the output shaft. Power is transmitted by direct coupling of the input and the output shaft.

Abstract: A tensionmeter of the type that the tension of an elongated object is measured by the amount of displacement of a sensing roller, wherein errors caused by the bending stress of the elongated object as well as the weight of the detector including the sensing roller are substantially elimiated from the result of measurement.

Abstract: A digital tachometer provided with a measuring shaft to be brought into contact with a rotating body to be measured for simultaneous rotation therewith. As the shaft is rotated the number of rotations of the rotating object is digitally indicated and the indication remains even after the measuring shaft has been moved out of contact with the rotating object under measurement.