Abstract: A double eccentric wave generator assembly for a harmonic drive type transmission having a circular spline and a flexible spline coaxially mounted each having matable gear teeth, a deflection means mounted within said flexspline, said deflection means comprising a pair of wave generating discs journalled on eccentric hubs on a sleeve. The discs are non-parallel with one another so as to present an outer periphery which is parallel to the flexspline when it is coned during deflection thereof. A third disc is disposed on the sleeve to provide shape control to the flexspline during rotation thereof.

Abstract: A process and apparatus are described for collection of gases and particulates which arise during the feeding of an electric furnace, especially in the manufacture of phosphorus. The collection system for the gases and particulates includes novel explosion panels which are employed in an enclosure that contains the gases and particulates, and the use of such panels also in the ductwork and filter units that conveys and treats the gases and particulates from the enclosure. A further treating system also prevents moisture in the gases and particulates from clogging the filters used to separate the particulates from the gases. Also described is a novel furnace feeding system that can be used in cooperation with the gas and particulate collection system.