Abstract: A container for storing a moisture-sensitive material which comprises a fillable space behind the moisture-sensitive material, which has contained therein a water-reactive, highly volatile silane, alkyl titanate or isocyanate which, upon reaction with water, produces a low-viscosity material which is water repellant. The water-reactive compound prevents contact of moisture with the moisture-sensitive material while it is in the container.

Abstract: A reproducing stylus traces a track of a recording medium, in which track an information signal is recorded as variations of geometrical shape, and reproduces as variations in capacitance the information signal thus recorded. The reproducing stylus comprises a reproducing stylus main structure having a tip portion with a sliding contact face for slidingly contacting at least one track of the recording medium, and an electrode disposed on the reproducing stylus main structure to trace one track and reproduce the information signal as the variations in capacitance in accordance with the variations in geometrical shape. The electrode has an end edge and side edges. The side edges are substantially parallel at least in the vicinity of the tip portion of the reproducing stylus main structure. The sliding contact face has a leading part and a trailing part respectively at the foremost end and the rearmost end in a relative sliding direction of the sliding contact face on the recording medium.

Abstract: An information signal recording system records an information signal, a first and a second reference signals for tracking control, and a third reference signal for switching the first and second reference signals at the time of reproduction on a recording disc. The first and second reference signals of different frequencies are alternately recorded on intermediate parts of the recording disc, at positions between centerlines of adjacent information signal tracks. The third reference signal of a still different frequency is recorded at a predetermined position on every information signal track. A reproducing system reproduces the information signal together with the third reference, and the first and second reference signals by a single reproducing element. A tracking control signal is produced from the first and second reference signals switched by the third reference signal separated from the reproduced information signal.

Abstract: A recording system records a television video signal of 60 fields per second converted from a signal of the picture image content of a cinematographic film for projection at 24 film frames per second, in a manner such that the video signal has parts in each of which the picture image content of one and the same film frame continues during at least 4 fields thereof, along a spiral track on a rotating recording medium rotating at a rotational speed of 900 revolutions per second at a recording rate of 4 fields per revolution of the recording medium.

Abstract: An information signal recording system records both an information one and at least one single kind of reference signal for providing a tracking control on a recording medium. The reference signal is recorded on an intermediate part of the recording medium. That part is located between the center lines of adjacent the tracks on which the information signal is recorded.

Abstract: An information signal recording system records both an information one and at least single kind of reference signal for providing a tracking control on a recording medium. The reference signal is recorded on an intermediate part of the recording medium. That part is located between the center lines of adjacent the tracks on which the information signal is recorded.

Abstract: An information signal recording system records both an information signal and at least one kind of reference signal for providing a tracking control on a recording medium. The reference signal is recorded on an intermediate part of the recording medium. That part is located between the center lines of adjacent tracks on which the information signal is recorded.

Abstract: An information signal recording system records an information signal, a first and a second reference signals for tracking control, and a third reference signal for switching the first and second reference signals at the time of reproduction on a recording disc. The first and second reference signals are alternately recorded at positions intermediate between centerlines of adjacent information signal tracks. The third reference signal is recorded at a predetermined position on every information signal track. A reproducing system reproduces the information signal together with the third reference, and the first and second reference signals by a single reproducing element. A tracking control signal is produced from the first and second reference signals switched by the third reference signal separated from the reproduced information signal.

Abstract: A system for transmitting carrier chrominance signals of color video signals has a maximum transmissible optimum level. A detection circuit responds to the level of the carrier chrominance signal comprising a carrier chrominance signal component and a color burst signal of a color video signal to generate a level control signal. A level control circuit responds to the level control signal, so that the peak value of the carrier chrominance signal becomes a value which is always substantially equal to the transmissible optimum level of the signal transmission system, and sends out the level controlled carrier chrominance signal to the signal transmission system.

Abstract: An information signal recording system separates a color video signal into a luminance signal and a carrier chrominance signal. The frequency of the separated carrier chrominance signal is converted to a lower frequency band. A carrier is frequency modulated with at least one audio signal which is mixed with the separated luminance signal and the frequency converted carrier chrominance signal. A carrier is frequency modulated with the mixed signals, and recorded as a main information signal on a main information signal track of a recording medium. A system for reproducing the recording medium reproduces the recorded main information signal from the recording medium. The reproduced main information signal is frequency demodulated, and the resulting output signal is separated into the luminance signal and the frequency converted carrier chrominance signal.