Abstract: An elastic motor having a constant torque characteristic utilizes a reel with elastic divided into unit lengths that are stretched to their maximum tension. Each unit length of the elastic is allowed to relax to its normal state while generating work in a process that will continue until the wheel is fully unwound. The present invention will ease design of mobile devices and the like by providing a power source having a predictable, constant, and stable output characteristic.

Abstract: An improved elastic motor is disclosed having a constant torque characteristic. In contrast to earlier motors which use springs wound on spools, the present invention utilizes a reel with elastic stretched to its maximum tension. Each unit length of the elastic is allowed to relax back to its normal state while generating work in a process that will continue until the wheel is fully unwound. The present invention will ease the design of mobile devices and the like by providing a power source having a predictable, stable, and constant torque output characteristic.

Abstract: A lifting platform is disclosed that utilizes means for energy recovery in order to maximize efficiency. Prior lifting platforms described by the inventor have utilized partial toroidal vortices in order to create a high pressure region below the platform. The present invention, however, improves on the prior lifting platforms by utilizing a complete toroidal vortex. Thus, a great deal of the energy expended is recovered by the recirculation of the fluid. The vortex fan must only supply the energy needed to overcome friction.

Abstract: Transformer rectifier units (TRU) for the conversion of AC to regulated DC are disclosed. One aspect of a TRU according to the invention is output boost regulation by monitoring the output from a conventional TRU, and when the output drops below 28 volts DC an additional electronic switching converter boosts the output up to the 28 volt DC level. Under overload conditions a bypass diode returns the operation to that of a conventional TRU to maintain the required high current. Another aspect, input buck regulation, regulates by controlling the impedance of an auxiliary TRU by transferring its output to the DC output via a conventional flyback converter.

Abstract: An improved coupling circuit for use in switched power supplies and other applications utilizes a DC restoration circuit following the secondary stage of a coupling transformer to maintain a relatively constant DC component in the coupled waveform, regardless of its duty cycle. Advantages of the invention include better frequency response, lower noise, and better linearity.

Abstract: A circuit and method for converting three-phase .DELTA. AC to a higher voltage DC output. The method utilizes first, second and third rectifying circuits and a storage circuit to provide DC. The circuit herein does not require an independent DC power source, nor a neutral AC connection, as used for conventional Y connected power systems. The circuit herein also provides a uniform loading to all three phases of the AC input. A preferred embodiment is provided herein comprised of twelve diodes and three capacitors, wherein the diodes rectify the current, and the capacitors store charge.

Abstract: An improved resonant forward dc-to-dc converter circuit includes control circuitry for achieving an optimal power cycle in which the transistor is either supplying current to the load or recovering in a sinusoidal manner, for limiting power loss by controlling the switch turn on time to the time when the switch collector voltage at recovery is at a mimimum, for maintaining an approximately constant turn off time and for providing pulse by pulse current mode control for high loop stability and superior transient response.