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Match Document Document Title
7689195 Multi-protocol radio frequency identification transponder tranceiver  
A transceiver for a RFID reader and a transceiver for a RFID transponder (tag) allow communication between the two devices. The RFID reader utilizes an analog front end and a digital backend. In...
7647125 Time-based control of a system having integration response  
A time-based controller provides control for a controlled system including a plant having an integration response. The time-based controller includes a comparator that detects a polarity change in...
7489254 System and method for monitoring a vertical shaft impact crusher  
A system and method for monitoring a vertical shaft impact crusher comprises a plurality of sensors which continuously monitor the current status of a plurality of crusher component parts, a...
6288652 Digitally encoded keyless entry keypad switch  
A five-switch keypad apparatus having four diodes that multiplex the switch contacts onto three sense terminals. The three sense terminals create a binary code that defines eight possible switch...
6137794 Audio-visual projector control apparatus allowing selection among multiple input devices  
A method and apparatus for controlling a remotely located audio-visual projector. In preferred embodiments, the invention enables connection of any selected one of a number of input devices (such...
6108377 Transmitter unit for an anti-theft system of a motor vehicle, and method for operating the transmitter unit  
A transmitter unit generates a carrier signal in the form of a periodic bipolar signal. The carrier signal has intrapulse periods between two pulses of different polarity. A transmission antenna...
6008733 Air conditioning system master/slave control unit determination  
A plurality of air conditioning system control units are connected to each other through a communication line (20). Discharge resistors (R1, R2) are provided for discharging residual charges of...
5661754 Receiver arrangement  
An infrared remote-control receiver employs at its front end a gyrator-configured transistor operating as a current-to-voltage converter, but derives its data information from a negative-going...
5400017 Transmission apparatus  
A transmission device is disclosed wherein a plurality of control units each having a transmitting/receiving block connected to one another through a positive signal line and a negative signal...
5339073 Access control equipment and method for using the same  
Access control equipment includes an interrogation unit which emits an interrogation signal, and a plurality of transponders, each transponder having a stored identity code different from that of...
5210531 Monitoring and control system with binary addressing  
A network of addressable modules is disclosed with each module being addressable by a particular multi-digit binary code and each having first and second normally high address input lines which go...
5210846 One-wire bus architecture  
A system architecture which provides efficient data communication, over a one-wire bus, with a portable data module which does not necessarily include any accurate time delay circuit whatsoever....
5194858 Lighting control system with set/reset ground remote  
A lighting load can be turned on/off manually from one or more remote switching stations as well as from a master switch controller station, with ON/OFF control signals produced at the remote...
5049729 Coded key system using pulse polarity  
A contactless coded key system, comprising a key 2 and key terminal each housing circuitry enabling information to be transferred from terminal to key, and vice versa, and enabling the key to be...
5043723 Memory remote control device  
A memory remote control device which comprises a wave shaping circuit for shaping a received remote-controlled signal and for outputting a pulse signal and an envelope signal, and a microcomputer...
4779071 System for transmitting commands  
A system is described for transmitting a plurality of commands to peripheral means, particularly to motor-driven transport means and principally to automatic carriages on rails for the overhead...
4725836 Series port connection of a plurality of terminals to a master processor  
A circuit arrangement for connecting a plurality of digitally operated terminals to a single communications circuit of a master digital processing unit, such as a central computer, for...
4709233 Single line pair power control system with multi-station capability  
A single line pair power control system is disclosed and consists of a reflex module supplying direct current of a first or a second polarity to the control line pair. The polarity of the reflex...
4614840 Telecommunication line circuit and associated polarity reversal circuit  
The present invention relates to a telecommunication line circuit including at least one line amplifier whose output is coupled to a telecommunication line conductor, and DC biasing means...
4608562 Address personalization of a remotely attached device  
In a data transmission system comprising of a transmitting unit, a plurality of remote devices, and one or more serial communication links interconnecting the devices to the transmitting unit the...
4604619 Apparatus and method for multiple mode remote control switching  
A remote controlled switching apparatus for controlling the operation of a device having a plurality of modes of operation. In the apparatus there is provided a first switch assembly responsive to...
4583091 Serial signal transmission system  
In a serial signal transmission system for transmitting data signals in a serial manner from a transmitting part to a receiving part of the system, both supplied power from a common power source,...
4567482 Bypass control for stations in a communication system  
A communication system wherein a plurality of remote stations are serially connected in a communication loop to a Control Station. Communication of intelligence to and from the remote stations and...
4502040 Keyboard having keys activated by electrical contacts and the capacity to read one state from among four possible states  
A keyboard having keys activated by electrical contacts and the capacity to read one state from among four possible states, wherein the keyboard is a dipole disposed between two terminals between...
4425564 Multiplex wiring system for motor vehicles  
A multiplex wiring system including a plurality of data line (n) from which (n2 -n) load devices may be either independently or simultaneously energized. The system includes a synchronizing unit...
4350979 System and method for well-logging  
An improved system and method is provided for obtaining information related to subsurface earth formations. Well-logging data from an input terminal is processed and stored in a memory by a first...
4277650 Single frequency tone receiver  
A tone receiver indicates the presence of a PCM tone signal in a bit stream of PCM signal samples. Predetermined characteristics in a consecutive series of PCM signal samples are used to define an...
4180804 Remote control device for an amplifier trap circuit  
An FM trap circuit in an amplifier mounted on a roof top antenna is made operable from inside the home by providing a switch on the amplifier which is responsive to the negative half cycle in an...
4153848 Receiver circuit  
A receiver circuit for receiving a double current pulse signal from a transmission line and delivering positive pulse or a negative pulse corresponding to that of the double current pulse signal...
4131839 System for multistation remote position indication and control  
A system is provided for multistation remote position indication for remotely controlling and indicating the position of a motor driven positioning system, particularly an antenna rotor, at...
4086569 Communication systems  
A communication system for communicating between a central control unit and a plurality of controlled units, all interconnected by a single communication channel, wherein communication is time...
3964023 Method of and apparatus for selectively controlling a plurality of remotely located loads  
A master controller is connected via a pair of wires to a plurality of loads and is capable of generating pulses having either positive or negative polarity and a voltage level either above a...
3905008 Sequential sampling telemetric apparatus  
1. In telemetric apparatus for sampling in rapid succession signal voltages f a given polarity on a plurality of information inputs, a signal voltage sampling network individual to each of said...
3885130 Value/use control and identification system for magnetic cards  
A card is spot magnetized with a value or use code, in which the polarities of the spots at one card surface are distributed in accordance with the Gray code in the described arrangement, and with...
3842403 OPTICAL REMOTE CONTROL SYSTEM  
A control including a transmitter and a receiver for remotely operating a device wherein the receiver and transmitter are powered by alternating current power supplies having a known phase...
3830960 CONTROL CIRCUIT FOR CONTROLLING AN APPARATUS  
A receiver control circuit for controlling the operation of a color television receiver, particularly in hospital installations. The receiver control circuit includes a remote control unit and a...
3713101 THYRISTOR TURN-ON CIRCUIT  
A triggering circuit is provided for supplying trigger signals to the gate of a high voltage controlled rectifier. The triggering circuit includes a transmitting antenna connected to a pulse train...
3657703 CODE-RESPONSIVE CONTROL RECEIVER  
A code-responsive control receiver for response to preselectable code combinations, which operates on the pulse interval principle and has a synchronous selector and switching device for...
3652995 INPUT CIRCUIT FOR A SIGNALLING SYSTEM WHICH CYCLICALLY SCANS A PLURALITY OF SIGNALLING STATIONS UNDER COUNTER CONTROL  
Each of a plurality of changeover switches is provided at a corresponding one of a plurality of signalling stations and has a first contact terminal connected to the positive polarity terminal of...
3559178 PULSE DISCRIMINATION CIRCUITRY  
3522588 DIRECT DIGITAL CONTROL INTERFACING CIRCUITRY  
3461428 REMOTE CONTROL SYSTEM INCLUDING CIRCUITRY FOR SUPERIMPOSING HIGHER FREQUENCY CONTROL SIGNALS ON A SUPPLY LINE CARRIER WAVE  
3452329 SUPERVISORY CONTROL SYSTEM  
3440607 CYCLICALLY SCANNED REMOTE ELEMENT OPERATING SYSTEM WITH ANSWER BACK  
3413605 Synchronous remote element operating system with answer back  
3330914 Signalling systems  
3319225 Remote control system including a frequency discriminating delay circuit  
3317895 Control of remote telephone and like equipments  
3289191 Solenoid selection arrangement  
3237163 Apparatus for testing circuit elements in a pulse responsive remote control system  

Matches 1 - 50 out of 75 1 2 >