Abstract: Embodiments of a performance tracking system and method are disclosed. One method embodiment, among others, includes receiving standardized physical performance test data over a network from a test site, the standardized physical performance test data corresponding to physical performance for a plurality of individuals, and processing the standardized physical performance test data to provide standardized data of physical performance among the plurality of individuals.

Abstract: A chain stitch sewing machine has a movable stitch eccentric shaft for switching between a bunch stitch and a long stitch and a rotatable main drive shaft. A mechanism is mounted on the main drive shaft for rotation therewith to move the eccentric shaft to effect the switching from the switch to the other while the machine is in operation.

Abstract: A stitch shortening device for a blind stitch sewing machine. A multiple cam is provided for reciprocating the feed drive lever. An adjustment wheel with peripheral teeth regulates the drive position of the multiple cam for lengthening or shortening the stitch by adjusting the feed drive. A pneumatic motor drives a toothed wheel meshing with the peripheral teeth of the adjusting wheel. When the pneumatic power is applied, the motor rotates the adjusting wheel in the direction of rotation of the sewing machine shaft but at a greater speed to maintain the adjusting wheel in large stitch drive position. When the operator activates a switch to cut off the pneumatic drive, the toothed wheel is idled and the adjusting wheel is moved into short stitch drive position. Applying the pneumatic power again moves the adjusting wheel into large stitch drive position again.