Abstract: Back torque is nearly eliminated in dynamos by permanent magnet invarient fields inducing current flow radiated invarient magnetic fields. In motors, back electromotive force is nearly eliminated by confining motor magnet flux lines to cutting of conductors in the direction of their length. Different dynamo configurations are disclosed which provide different outputs, high-amp/low-volt DC or AC and high-volt/low-amp DC. In a preferred dynamo-motor embodiment, flux lines of rotating dynamo dual-pole ring-magnets cut through a stationary copper disc which generates alternating current. The dynamo copper disc is connected to motor stationary flat copper rings. High-amp/low-volt generated AC enters and exits the copper rings at diametrically opposite locations. Motor magnet-pairs are rotationally mounted inside the copper rings.

Abstract: Across the surface and around two opposite sides of a table top are looped two elastic hold down straps. A third elastic hold down strap is looped around these two straps and the other two sides of the table top. Lips grip an edge of the table top. The table top is slidably mounted on rails held parallel by two parallel supports each pivotally connected to ends of arms. The arms are pivotally connected at their other ends to a shaft. Upper ends of table legs are pivotally connected to the shaft. Interspaced between arms and legs on the shaft are spacers and a tube through which the shaft passes. When a cap nut is secured on one end of the shaft and a knob is screwed onto threads at the other end of the shaft, arms and legs are pressed together preventing them from pivoting around the shaft and locking the table top in a chosen position of height and inclination. Springs connecting arms and legs bias arms to rise to a vertical position when the knob is loosened.