Projector television tube alignment means and method

摘要

An article of manufacture comprising a cathode ray tube is disclosed for use in a projection television system. The tube has a funnel and a face panel with a window for receiving a rectangular imaging screen. The projection television system includes tube receptacle means having conjugate means for accepting the tube in proper rotational alignment. The tube according to the invention is characterized by having two pairs of substantially radially oriented embossments on the funnel. The embossments are centered on, and azimuthally spaced one hundred and eighty degrees apart, on a diametrical line about forty-five degrees in counterclockwise rotation with respect to the minor axis of the rectangular imaging screen. The pairs of embossments according to the invention provide for engagement with the conjugate means of the tube receptacle means for proper rotational alignment of the tube in the system.