Abstract: Current and voltage waveforms on the branches of each node of a power distribution network are sampled. The samples are converted to digital signals which are resolved into spectral components and processed to obtain the power (KVA) phasor at each frequency (harmonic component) of interest. The phase angles of the phasors describe the directions of movement, and thereby the locations of the sources, of the power harmonics in the network. A summary report is generated.

Abstract: A door mounted exercising device which is to connect with the bottom edge of a door with the door being located in a closed position with respect to the door jamb. The exercising force is to be transmitted through the door against the door jamb. The exercising device is attached to the door by means of attaching bracket assembly which is removably secured to the door. The exercising device includes a tube within which is located a coil spring. The tube is removably connected through a pin and slot assembly to the attaching bracket assembly. The spring is mounted about a rod which is positioned within the tube. A portion of the rod extends exteriorly of the tube and is attached to a graspable handle assembly. The handle assembly is capable of being pivoted relative to the rod.

Abstract: An exercising device which is to connect with the bottom edge of a door with the door being located in the closed position with respect to the door jam. The exercising force is to be transmitted through the door against the door jam. The exercising device is attached to the door by means of an attaching bracket assembly which is removably secured to the door. Between the attaching bracket assembly and a handle assembly is located an elastic, elongated stretchable cord. The cord can be either solid in cross-section or can be tubular. Connected to the handle assembly is an adjustable strap which is to be located about portions of the user's body during the performing of certain exercises. The handle assembly includes a cushiony pad which is to abut portions of the user's body during the performing of certain exercises as to provide a soft cushiony surface. The elongated stretchable cord is almost entirely located between an enclosing tube.