Abstract: The system includes at least two power disc elements mounted for rotation about a central axis, with one power disc element including a peripheral gear portion in a first rim portion thereof, and with the other power disc element including a first peripheral gear portion in a first rim portion facing the first rim portion of the one power disc element. An intermediate gear element has a set of teeth around the outer periphery thereof and is positioned so as to mate with the first peripheral gear portions of both the one power disc element and the other power disc element. At least one power disc assembly which includes an additional power disc element is positioned either before the first power disc element or following the other power disc element and includes a plurality of gears for connection with a prior or successive power disc element. An input drive assembly provides input power to the power system and an output assembly takes power off the power system.

Abstract: The system includes at least two power disc elements, each mounted for rotation on a central shaft which is typically fixed. The first power disc element includes a first peripheral gear portion by which the first power disc element may be turned by an input assembly. The first power disc element has a second gear portion which may have a substantially smaller diameter than the outside diameter thereof. A second power disc portion has a plurality of outer drive gears mounted for rotation to mate with the second peripheral gear portion on the first power disc element. A central gear, which may be substantially larger than the outer drive gears, is positioned to mate with the outer drive gear in the the second power disc element. The second power disc element drives an output assembly.