Abstract: A turnaround control arrangement for a color video recording and playback system, in which a color burst frequency at turnaround time is recorded during a certain vertical blanking interval in a distinct pattern; and in which, in playback the tape reversal operation is initiated at least partially under control of this distinct pattern. This "turnaround flag" is also used to control the insertion of the sound signal carrier frequency of the system during turnaround, thereby to reduce the noise due to the loss of the recorded sound signal during turnaround in playback.

Abstract: In a tape transport system in which the take-up reel of a self-threading magnetic recording tape having a leader attached to its forward end is driven by surface engagement with a rotating capstan, a safety picker is provided at a point just beyond the area of engagement between the take-up hub and the capstan, for intercepting the leader if it fails to properly engage the hub. A contact cooperating with the safety picker causes the threading operation to be discontinued if the leader has thus been intercepted.

Abstract: A system for automatically loading and tensioning a supply reel of magnetic recording which is contained in a tape cassette. The system is designed to be utilized with a tape transport mechanism of the type wherein the supply reel is driven by surface engagement of the outermost layer of tape on the reel with a capstan. A motor driven leadscrew mechanically engages the tape transport apparatus and functions as a means for sequencing its operation in a manner so that upon loading, the normally-closed cassette is opened and the tape pack is advanced by the transport apparatus into an operative position in which it is in contact with the capstan. Following the threading of the tape about the take-up reel, the leadscrew causes the transport apparatus to withdraw the supply tape pack from close contact with the capstan in order to allow slack to be removed therefrom through the action of a brake upon the supply reel.

Abstract: An apparatus for automatically threading a supply reel of magnetic recording tape equipped with a self starting leader into a tape transport mechanism of the type in which take-up and supply reels are simultaneously driven by surface engagement of a capstan with the outermost tape layer on each reel.

Abstract: A magnetic tape cassette comprises a housing open on one side and, movable therein, a sheath enclosing a magnetic tape roll. Detachable retaining means in the cassette hold the sheath and the roll in position while the cassette is not on the recorder. The retaining means are detachable by unlatching means when the cassette is fitted to the recorder, so that, following a movement of the sheath, the cassette is opened to allow the roll to emerge at least partially from the cassette and the circumference of the roll to be rotated by means of a recorder-associated capstan provided outside the cassette. Further advantageous embodiments of the invention concern the cassette and the recorder. The cassette of the invention and the recorder associated therewith can be employed in all fields of magnetic tape recording and reproduction. Its application to a magnetic tape system with a self-threading tape end entails advantages.

Abstract: The invention relates to a cartridge for a recording medium in tape or strip form and a transport apparatus for use with such a cartridge, both being favorably matched to one another according to the invention. The cartridge consists essentially of a housing which is composed of parts pivotally connected to one another and, in the closed position, completely encloses a roll of tape wound on a hub. In the open position of the cartridge, at least part of the roll of tape is so exposed that the roll can be rotated and the tape or strip scanned on the apparatus. The transport apparatus is provided with appropriately designed means for receiving the cartridge which, when some of its components are pivoted, swings apart the parts of the cartridge, which is placed upon the apparatus in the closed position, and thus opens the cartridge.

Abstract: This invention relates to methods or circuit arrangements for compensating time base error in recording systems, particularly video recording systems, by electro-mechanical and electronic means. The circuit arrangements provide for separation of the horizontal synchronizing pulses from the video information contained in a signal coming from a recorded video tape, comparison of the phase of these horizontal synchronizing pulses to the phase of a reference pulse, and adjustment of the frequency of the horizontal synchronizing pulses which go to the video receiver to eliminate time base error.

Abstract: A video tape recorder wherein the video signal is recorded on the tape as a frequency-modulated signal. The video recorder comprises a transport for the tape which is constructed suitably for reversing the direction of tape movement during signal recording and reproducing. The video signals are successively transduced on or from longitudinally extending parallel tracks on the tape. Initiating of the reverse movement of tape is improved by the use of a special high frequency signal. Said frequency also could be higher than the upper frequencies which can still be transduced by the used magnetic head at playback. Easily manufactured circuits are provided for the highly accurate detection of the special high frequency signal. Said frequency should be in a higher frequency range than the highest frequency of the video signals, more exactly above the white level of the video signals.

Abstract: The invention relates to a dropout compensator for a trisequential color video playback system which compensates for dropouts in color video signals with a high degree of accuracy. Only the color information including the Y low portion of the luminance signal is delayed for a period of substantially one line of video information after separation of the color information from the Y high portion of the luminance signal and after FM demodulation of the color information signals. In addition to the two conventional delay means, connected in series, present in a trisequential system and necessary for converting time-sequential occuring color signals into signals occurring at the same time, there is provided a third delay means for the compensation of dropouts.