Abstract: The invention relates to a display unit in which characters, symbols or pictures are created in matrices composed of lines and columns by the presence or absence of graphic display elements, and the display elements are moved into a visible or invisible position simultaneously in the one direction, such as columns, and subsequently in the other direction, such as lines, by a composing unit activated, for example, electromagnetically, by a data processing unit. The display elements are moved past the composing unit, and when, during this movement, the next axis (column or line) to be set has reached a setting position, an impulse is sent back to the data processing unit releasing the activation of the composing unit. With a transport belt having display elements which are only partially punched out, the display elements can be moved by the composing unit in a way that they will be positioned in front of or behind a separating strip during subsequent rotation of the transport belt.

Abstract: A television sound receiving circuit for at least one sound channel contained in an RF signal converts the transmitted or already down-converted television signal as a composite signal to the baseband in a single-sideband demodulator circuit using the "phasing method", separates the first sound channel, corresponding to a lower sideband, and the second sound channel, corresponding to an upper sideband, and produces first and second sound signals at the desired frequency by subsequent frequency demodulation. Also shown are the interfaces for possible digitization and an advantageous use of the interfaces in which picture and sound signals are digitized together. The data can be combined into a single data stream which can be transferred over a bus system and is separable into the individual components if required.

Abstract: A superheterodyne receiver using the "Third Method" is equipped for reception of color-television programs. The oscillator frequency for the first mixer is located exactly in the middle between the picture carrier and the chrominance subcarrier, so that the picture carrier and the chrominance subcarrier coincide at the intermediate frequency. The Nyquist slope for the picture carrier is made steeper, so that one loss-pass filter slope determines the Nyquist slope for the picture carrier and the chrominance subcarrier and the adjacent-channel selectivity on both sides in the RF spectrum.

Abstract: By means of sonic or ultrasonic energy, flow rate is determined as a linear function of the difference between two frequencies by taking measurements in the direction of flow and in the direction opposite thereto. Transducers are used alternately as generators and pickups. To this end, the transit time difference is determined by means of a phase detector, and the frequencies of two oscillators are readjusted in accordance with the results of the measurements. The difference frequency can be indicated and calibrated in flow rate, and the number of cycles can be counted, the flow volume being directly proportional thereto.