Abstract: A method for operating a rotary vessel which monitors the position of the tire relative to the upper and lower thrust bearings and the temperature of the upper and lower thrust bearings and provides an output that alerts an operator when corrective action should be taken.

Abstract: A display device for illustrating the internal construction of a conventional bedding system displayed on the sales floor of a store is adapted to be superposed on a corner of the displayed bedding system. The novel display device comprises three generally-planar members, one planar member corresponding with the horizontally-disposed body-receiving surface of the mattress and the other two generally-planar members corresponding to the two side surfaces of the bedding system forming the corner on which the display device is superposed. On each of the three generally-planar members of the device is a different picture, each picture portraying the likeness of the individual components of the innerspring assembly of the mattress on which the display device is superposed in such a way that these likeness simulate in two dimensions the structures and arrangement of the corresponding components in the innerspring assembly of the mattress.