Abstract: For the remote control of construction machinery, more specially in the form of the distribution mast or boom of a concrete pump, in the invention a transmission system has a radio remote control unit whose control transmitter and receiver are joined up with the command unit and with the distributor for the solenoid valves respectively by respective plug contact connector means. The transmission mode is one using digitally encoded RF messages so that for each control function two part-messages are continuously transmitted after the connections have been made, such messages each being made up of a bit representative of the function, of address information and of a parity bit for security, and mirroring the condition of the circuits of the command unit. The receiver has a RF receiving part, a central process controller and a relay part or a D/A converter.

Abstract: Method of switching off the stand-by operation of a television receiver including a microprocessor, which includes providing the microprocessor in the form of a timer, and switching off the receiver with the timer after a given length of time, and a receiver for carrying out the method.

Abstract: A switched power supply is connected to electronic circuitry the supply of power to which is to be controlled. An automatic switch enables the switched power supply selectively to energize or de-energize the electronic circuitry. A nominally continuous power supply is also provided, and a reset signal generator is connected thereto for generating a reset signal in response to a rising edge of an output voltage of the nominally continuous power supply following an interruption of the output voltage. A power switch is provided, together with a reset device actuated by the reset signal and a switching circuit controller connected to the automatic switch. A memory is connected to the switching circuit controller for memorizing the condition thereof and producing a memory output signal in response thereto. A detector detects the condition of the power switch and produces a detector output signal in response thereto.

Abstract: A vehicle radio receiver apparatus constitutes an antenna device including an antenna element and also a radio receiver integral with the antenna device so as to receive a signal from the antenna element. The radio receiver includes a tuner circuit directly connected to the antenna element, a high-frequency amplifier circuit for amplifying the reception signal tuned into by the tuner circuit, and an audio signal converter for detecting and low-frequency amplifying a high-frequency amplified signal and for producing an audio signal. A tuning control signal and a volume control signal are respectively supplied from a control unit to the tuning circuit and the audio signal converter circuit of the radio receiver. This control unit is arranged separately from the radio receiver and receives volume control and tuning control operating signals from an operating section which has a tuning control knob, a volume control knob and the like.

Abstract: Static audio-frequency control receiver for the time impulse interval process, consisting of a micro-computer, an electronic computing means and an evaluation component. In the micro-computer, a number of impulse scanning patterns are stored, and a programming field is formed for the selection of the impulse scanning pattern governing at the installation location. The programming field consists of a crossbar distribution panel with junctions from the outputs of the micro-computer with three inputs per command execution relay. The inputs for each of the relays have further connections for programming impulse scanning patterns. The micro-computer produces a series of rapid impulses upon connection, and performs a self-activating operation tests. The impulse scanning patterns cause connections to be made in the arithmetic unit for the production of impulse sequences in real time to the audio-frequency control command - impulse sequences. The micro-computer also has a synchronizing input.

Abstract: A remote unit can be controlled by sensing the change of impedance in the power line of a control unit as the control unit is turned on. The power line circuit includes a portion of an oscillator which is damped by the turn-on. Functions such as power turn-on and temporary audio muting are possible with minimal voltage drop in the power line.

Abstract: In a system for the remote control of premises using a watch radar apparatus for detecting intrusions into its field of radiation, including an alarm device, wherein the reception by the radar apparatus of radiation from portable transmitting device controls the connection of the radar apparatus to the alarm device, so that the alarm is made to change from an operative state to an inoperative state, and to change from an inoperative state to an operative state in response to the actuation of said portable transmitting device.

Abstract: In a wired remote control for use with a television receiver, audio signals are coupled to a loudspeaker by a transformer providing electrical isolation. The remote control device comprises an oscillator applying a signal at a frequency above the audio range to the transformer and a rectifier at the transformer secondary converting the oscillator signal to a DC signal. That DC signal is selectively applied by a switch to an optocoupler which couples to a control device for controlling the audio source. A filter blocks the oscillator signal from the speaker. Additionally, the control device controls TV channel selection.

Abstract: A combined remote control unit is provided for wireless communication equipment such as television receivers, frequency modulation or amplitude modulation radio receivers, or other equipment used in wireless communication systems, the remote control unit being capable of setting the equipment to any selected signal channel, and the remote control unit concomitantly causing the antenna associated with the equipment to be rotated to an angular position at which optimum signal processing in the selected channel may be effectuated.

Abstract: Method of increasing the number of instructions according to the invention consists therein that withing the command signal (6) additional instructions are transmitted, which after being decoded in the instruction decoder (1) and processed in the strobbin signal generation circuit (4) strobes the operation of additional controlled units (5) and control the transmission of the signal through the register (2) to the controlled units (3).In the system according to the invention, between one of the outputs od the instruction decoder (1) and the unit (3) to be controlled the register (2) is connected, provided with an additional input for the record inhibiting instruction (10), whereas to the second output of the instruction decoder (1) the strobbing signal generation circuit (4) is connected aimed at controlling the additional controlled units (5).

Abstract: A battery-powered receiver having a switch for disconnecting the battery from radio frequency detection circuits within the receiver upon receipt of a sequence of coded address and command signals. Each address and command signal is a radio frequency modulated with an audio or tone frequency. A tone decoder within the receiver is sensitive to audio signals whose frequencies lie within any one of sixteen predetermined frequency ranges. Stored at the output of the decoder is an address code of two or more numbers representing tone frequencies, these numbers being representative of the particular receiver or group of receivers. A sequence of audio signals detected by the tone detector is compared with the stored address code. If the address signals are followed by a coded command signal, made up of a tone signal or sequence of tone signals, the tone detector gives an output which causes the battery switch to be opened for a time determined by the coding of the command signal.

Abstract: An exterior mounted remote control television channel selector for use with a television receiver having a conventional manual channel selector knob is provided. A receiver mechanism is provided with a motor that is rotated in response to a remote control signal received thereby. A U-shaped linkage member is coupled to the motor and is rotated thereby. The U-shaped linkage member is adapted to be selectively coupled directly to the channel selector knob of a television receiver to thereby impart rotary motion of the channel selector knob and permit channel selection to be affected.

Abstract: A radiotelephone system having a control transmitter unit which includes a control unit having operating keys, a channel indicator device, a function indicator device and a loudspeaker/microphone device, the control transmitter unit including an ultrasonic or infrared transmitter for the transmission of the function signals required for operation of the radiotelephone system, the radiotelephone system further having a receiver unit provided with an ultrasonic or infrared receiver for actuating function and indicator devices.

Abstract: A remote volume control for television sets wherein an unshielded flexible metal shaft is directly connected to the television volume control at one end and at the other to a motor driven gear train mounted to the side or top of the set adjacent to the volume control. Remotely positioned hand-held switching means and batteries permit the user to effect clockwise and counter-clockwise rotation of the volume control shaft to control volume.

Abstract: A scan-lock control device is provided for use with a high frequency receiver in a manner which adds frequency scanning and lock-up functions to the receiver without affecting any of the receiver's other functions. The scan-lock control incorporates an interface unit which can be operatively connected to the receiver to interconnect scanning and lock-up circuits to the receiver. The scan-lock device also incorporates a novel multiplexer unit which is modular and expandable and has a plurality of plug-in cards operatively associated therewith; each card having programmed thereon a frequency data channel which may be selectively scanned.

Abstract: The invention is directed to a remote equipment control system having a low duty cycle communications link between a remote command transmitter and a remote receiver. The remote receiver is controllingly coupled to the equipment. The remote command transmitter includes a means to transmit a message signal of set time duration at a preselected message separation interval. The message signal has a unique address portion and a command portion.The remote receiver includes a decoding unit and a timing circuit. The decoding unit is responsive to the unique address portion of a received message to provide an enabling signal to be delivered to the timing circuit. The timing circuit upon receipt of the enabling signal provides an output to the decoding unit to prevent entry of any message signal to the decoder for a time duration matching the preselected message separation interval and allowing entry of a message signal for a time duration matching the time duration of the message signal.

Abstract: A superheterodyne radio receiver which is simultaneously tuned to receive both signals selectively tuned within the general AM broadcast spectrum and signals transmitted at the intermediate frequency, as defined in the receiver. The receiver responds to predetermined coded signals on the broadcast intermediate frequency signal to inhibit the local oscillator in preference to subsequent information broadcast on the intermediate frequency.

Abstract: A control circuit for controlling selected functions in a signal receiver, such as a television receiver, in response either to remotely generated control signals of different selected frequencies or to manual controls which are provided on the signal receiver. The control circuit comprises an integrated circuit having a first input for receiving the remotely generated control signals. A frequency discriminator is included in the integrated circuit to detect the frequency of a signal applied thereto and to produce corresponding function control signals. A variable oscillator, also included in the integrated circuit, selectively generates local control signals of substantially the same different selected frequencies as the remotely generated control signals. A mixing circuit supplies the received remotely generated control signals or the local control signals to the frequency discriminator.