Abstract: A movable head support arm establishes a curved path and orientation for the head along a memory disc such that the head gap is maintained tangential to the path. A variable delay of the track reference, established as a function of track position, is developed to insure coherence of stored information from track to track in the direction of the head path.

Abstract: Apparatus in which a recording transducer is moved along a rotating record medium to develop a series of imprints which are phase-synchronized from track to track. The adjacent tracks are merged with the result that the imprints form a slanted pattern of generally continuous lines extending at an angle to the record tracks.More than one recording can coexist in the same medium surface by means of utilizing a plurality of such slanted patterns, each of a different slant. For multiple recordings, either a plurality of transducers are used to record and playback, or a single transducer can be used by rotating it to the appropriate orientation.Sound is recorded in the sync. intervals in the form of samples which form a staggered pattern of their own from track to track, so that only one sound sample may be read out at a time, even when the tracks have been heavily overlapped. Since the sound samples utilize a much smaller portion of the medium surface than the video, there is room in the sync.

Abstract: The video or television signals are broken into numerous elements representing spaced portions of the video display screen along the line sweep, and imprints (electrical or optical) for each element are made in a path on a rotating medium which may be a disc, drum or belt. The lineal length of each imprint on the path is determined by the light characteristic of the video signal being recorded. Clock marks are permanently recorded in a separate path on the rotating medium, one for each spacing of the line elements, to accurately locate the elements on the rotating medium and thereby accurately locating the elements on the screen when the information is decoded. For the U.S. television operational mode, one rotation of the rotating medium takes place in 1/30 of a second to give a complete picture frame, including interlacing.

Abstract: The video or television signals are broken into numerous elements representing spaced portions of the video display screen along the line sweep, and imprints (electrical or optical) for each element are made in a path on a rotating medium which may be a disc, drum or belt. The lineal length of each imprint on the path is determined by the light characteristic of the video signal being recorded. Clock marks are permanently recorded in a separate path on the rotating medium.Maximum density of imprints is achieved by using an extremely narrow width of about one ten thousandth to one thousandth of an inch wide, and not only make adjacent tracks contiguous, but actually overlapping.Sound is supplied by using an unused portion of the video signal and the trailing edges of the line start pulses are convenient portions.

Abstract: Video pictures are taken by a standard television camera, and each frame (usually 1/30 of a second duration) is encoded on a magnetic storage disk rotating at a speed synchronous with the frame rate (1800 rpm for a 1/30 second frame), so that one frame is recorded during one rotation of the disk. The encoded disk is then rotated at a rate that permits the encoded magnetic transitions to be read or decoded at an audio frequency. The information thus obtained is transmitted over an audio frequency communication system, such as a telephone line, and is recorded on a second storage disk at the receiving end of the ransmission system, such as a telephone line, and is recorded on a secon storage disk at the receiving end of the transmission system, with the disk rotating at the same speed as the transmitting disk so that one frame is recorded for each revolution.