Abstract: An exercising device is described for developing strength and endurance in the wrist and forearms. The device includes two handles mounted to a housing. One handle is fixed. The other handle is rotatable about the axis of a shaft mounting it to the housing. Variable resistance to rotation of the handle and shaft is provided through a dial adjustable brake arrangement attached to the shaft within the housing. The shaft-mounted handle is angularly offset from the shaft axis by an obtuse angle that best represents the natural angular wrist-forearm relation used during pronation, supination, flexion, extension, abduction, and adduction of the wrist. Specific groups of arm and wrist muscles can thus be exercised isotonically by holding one handle stationary and repeatedly turning the other handle against the resistance selected.

Abstract: The laser light is polarized and sent through an electro-optic pockels cell here it is phased shifted in a duty cycle in accordance with the amplitude intensity. The light is then sent through an analyzer which will act as an attenuator to regulate the final amplitude output of the light.