Abstract: A light display system adapted for mounting on a rotatable member and capable of generating an image visually perceptible in a reference frame fixed relative to the rotatable member. The display system has a base adapted for mounting on the rotatable member for rotation with the rotatable member about an axis of rotation. Plural light arrays are mounted on the base at angularly spaced locations around a center of the base; each light array has a plurality of lamps. A sensor is operable to detect the fixed reference frame and to provide a signal indicative of the fixed reference frame. A controller is operatively connected to the sensor for receiving the signal from the sensor and is operatively connected to the light arrays. The controller is configured for firing the light arrays in predetermined positions relative to the fixed reference frame to form the image visually perceptible in the fixed reference frame.

Abstract: This invention relates to a lubricating film type gas seal having a stationary sealing ring (stator) with a radially extending sealing face and a rotating mating seal component (mating rotor) with a radially extending sealing face. The present seal has a reduced number of components and is greatly simplified from working seals described in prior art. The mating rotor is deliberately flexible, and hence it may distort (tilt) throughout an angular range during hydrostatic and hydrodynamic operation and is dependent on rotational speed, pressure, temperature and is also a function of its material and geometric properties. The stationary ring sealing face complies to and follows the angular distortion (tilting) of the mating rotor sealing face in a converging or diverging manner throughout the hydrostatic and hydrodynamic operational range. The flexibility of the stator is a function of its geometric and material properties. Mating rotor and stator flexibility is preferably matched (e.g.