Abstract: Two embodiments of a non-compatible television system are disclosed. In the first embodiment, two video sources of color television picture information, comprising an independent or stereoscopic pair of real-time images, are encoded and transmitted over a standard bandwidth channel to a non-standard television receiver, i.e., one with means for decoding the encoded transmission. In the case of independent images the received encoded video signal is decoded to recover the two video sources for display; and in the case of stereoscopic images the received encoded video signal is decoded for presentation of stereoscopic imagery. In the second embodiment, a single video source of real-time color television picture information is encoded and transmitted over a half standard bandwidth channel to a non-standard television receiver. The received encoded video signal is decoded to recover the single video source for display.

Abstract: A compatible television system which provides means for encoding two video sources of color television picture information, comprising an independent or stereoscopic pair of real-time images, is disclosed. A first video source provides a first video signal, and a second video source provides a second video signal in time synchronism with the first video signal.The encoding process provides a composite video signal such that a standard television receiver will render the imagery corresponding to the first video source. A non-standard television receiver, i.e., one with means for decoding the second video signal, will render the imagery corresponding to the second video source and/or the imagery corresponding to the first video source. The means for rendering the imagery corresponding to the first video source is provided by a standard video channel as in the standard television receiver, and requires no decoder.

Abstract: A compatible television system which provides means for encoding two video sources of color television picture information, comprising an independent or stereoscopic pair of real-time images, is disclosed. A first video source provides a first video signal, and a second video source provides a second video signal in time synchronism with the first video signal.The encoding process provides a composite video signal such that a standard television receiver will render the imagery corresponding to the first video source. A non-standard television receiver, i.e., one with means for decoding the second video signal, will render the imagery corresponding to the second video source and/or the imagery corresponding to the first video source. The means for rendering the imagery corresponding to the first video source is provided by a standard video channel as in the standard television receiver, and requires no decoder.

Abstract: Moving map and other navigational display systems are disclosed herein which provide indications of relative position between a vehicle such as an aircraft and the terrain or other point(s) of reference. Optical images of a particular segment of terrain (or other reference data) are opto-mechanically selected in accordance with gross vehicle position; the selected segment image is coupled to a vidicon system or flying spot scanner system. By controlling the deflection circuits and thus the geometry of the vidicon raster or flying spot raster as a function of position and orientation of the vehicle as it moves, i.e. by electronically traversing the selected terrain image in duplication of the vehicle's motion (in accordance with the selected display stabilization mode), and photo-electrically sensing the image elements, a video representation of the vehicle's relative location and motion is obtained. This video is then displayed along with other desired data on a cathode ray tube or other display device.

Abstract: A framework joint comprises a square open-ended tube and a connector fitting comprising a preferably cubical hub portion having a tube-receiving projection or post extending from one of two or more faces thereof having a similar projection. Each tube-receiving projection has diametrically opposed portions of maximum spacing adapted frictionally to engage the opposed flat inner surfaces of a square tube and diametrically opposing portions of lesser spacing between said portions of maximum spacing and which provide clearance for the passage of a flexible resilient locking tongue inclining inwardly and axially from the wall of the square tube. The locking tongue preferably has a convex shape to be engageable by the recessed radially outwardly facing surface of a groove formed in the associated tube-receiving projection of the connector fitting.