Abstract: An exercise device with a crank housing supporting a pedal crank having a pair of opposing pedals that are pivotally mounted to the pedal crank. A first strut extends from the crank housing and is jointed to a second strut by a coupling that selectively allows the struts to rotate relative to each other so that the device may be folded into a planar configuration or extended and locked into place for use of the pedal crank. A cross-member is positioned at the end of each strut to form legs for supporting the pedal crank in an upright position. A strap may be coupled to one of the pair of legs for additionally securing the exercise device to an airline seat. A tensioner is associated with the crank housing for selectively increasing and decreasing the force needed to turn the pedal crank.

Abstract: An exercise device with a crank housing supporting a pedal crank having a pair of opposing pedals that are pivotally mounted to the pedal crank. A pair of struts extends from the crank housing and one of the struts has a hinge that allows the leg to fold inward into a collapsed configuration or extend and lock into place for use of the pedal crank. A cross-member is positioned at the end of each strut to form legs for supporting the pedal crank in an upright position. A strap may be coupled to one of the pair of legs for additionally securing the exercise device to an airline seat. A tensioner is associated with the crank housing for selectively increasing and decreasing the force needed to turn the pedal crank.

Abstract: An exercise device with a crank housing supporting a pedal crank having a pair of opposing pedals that are pivotally mounted to the pedal crank. A first strut extends from the crank housing and is jointed to a second strut by a coupling that selectively allows the struts to rotate relative to each other so that the device may be folded into a planar configuration or extended and locked into place for use of the pedal crank. A cross-member is positioned at the end of each strut to form legs for supporting the pedal crank in an upright position. A strap may be coupled to one of the pair of legs for additionally securing the exercise device to an airline seat. A tensioner is associated with the crank housing for selectively increasing and decreasing the force needed to turn the pedal crank.

Abstract: A remote control system for use e.g. in controlling the locomotives and ancillary devices of a model train layout comprises a transmitter and a number of receivers incorporated in the devices to be controlled. A composite waveform is applied across the tracks, comprising a rectangular power supply waveform with intervals between positive and negative path cycles and control signals which occur in the latter parts of these intervals, the delay between the end of each half cycle and the control signals allowing time for reactive currents resulting from inductive loads to decay. The composite waveform is synthesized by two switching amplifiers driven by a microprocessor and having associated with it slider controls and a keyboard for controlling the receivers. The receivers are programmed to identify control signals addressed to them and to control an associated locomotive or an ancillary device appropriately.