A system for transmitting information between at least two stations the information originating from free or engaged channels in a multiplex frame, each station comprising at least one transmitting circuit and one receiving circuit powered from a power supply, and means for detecting the free and engaged channels to provide a procedure for establishing a multiplex formed by an elementary frame in which the engaged channels are grouped side-by-side in the elementary frame and means for reducing the power consumption of the transmitting and receiving circuits

Multiplex information transmission system

PURPOSE:To reduce the consumption time of a battery, by actuating an electrical closed circuit consisting of a potentiometer working in coupling to water pressure gauge and a battery only for the necessary time and closing the circuit when not in use. CONSTITUTION:The signal fa sent from a reference signal oscillator 3 is gated through a gate circuit 2 and the gate pulse supplied from the 1st gate pulse generator 1, and a wave transmitter To is excited by a power amplifier 5 via a buffer amplifier 4. On the other hand, the gate pulse of the generator 1 is applied to a pulse delaying circuit 20. The delay time of the circuit 20 is decided by the resistance value of a delay extent control resistor 23 interlocking the mobile bar of a water pressure gauge 13 and then supplied to the 2nd gate pulse generator 21 in the form of a pulse duration after lapse of a necessary time. With this pulse, the output of the generator 21 obtains the signal, and this signal controls a switching transistor 22. Thus voltage information (e) is generated at a potentiometer 14 only for the time corresponding to the pulse duration of signal.

Underwater position measuring pinger

For contactless signal transmission, a signal transmitted by a transmitter is subjected to reshaping in such a manner that its reproducibility and/or transmissibility are/is exacerbated, but also in ;uch a manner that the reshaping can be detected in a detector in the receiver. In this way, the signal transmission is protected against the possibility of a deliberately short range between the transmitter and receiver being enlarged by manipulation by an intermediate transmitter/receiver.

Method for protection of contactless signal transmission from a transmitter to a receiver, and a signal transmission device

In a radio control system of the digital proportional control type in which a control signal whose period comprises a plurality of control pulses and a timing pulse is transmitted to control servomechanisms in response to the time width of each control pulse, the carrier wave exists only for the time between the trailing end of each control pulse and the leading end of the next control pulse, for the time between the trailing end of the timing pulse and the leading end of the first control pulse, and for the time between the leading end of the timing pulse and the trailing end of the last control pulse, in order to minimize consumption of the supply battery.

Energy conserving pulse keying technique for a radio control system

In a radio control system of the digital proportional control type in which a control signal whose period comprises a plurality of control pulses and a timing pulse is transmitted to control servomechanisms in response to the time width of each control pulse, the carrier wave exists only for the time between the trailing end of each control pulse and the leading end of the next control pulse, for the time between the trailing end of the timing pulse and the leading end of the first control pulse, and for the time between the leading end of the timing pulse and the trailing end of the last control pulse, in order to minimize consumption of the supply battery

Kenichi Mabuchi

Papers

Energy conserving pulse keying technique for a radio control system

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