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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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.... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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,... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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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... |
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3559178 |
PULSE DISCRIMINATION CIRCUITRY
1,235,330. Data storage. BURROUGHS CORP. 29 July, 1968 [4 Aug., 1967], No. 36004/68. Heading G4C. [Also in Division H3] An amplitude discriminator receiving pulses derived from a magnetic surface... |
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3522588 |
DIRECT DIGITAL CONTROL INTERFACING CIRCUITRY
1,223,299. Selective signalling. HONEYWELL Inc. 3 July, 1968 [6 July, 1967], No. 31743/68. Heading G4H. In a system for controlling a plurality processes 12, Fig. 1, by a computer 1, each element... |
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3461428 |
REMOTE CONTROL SYSTEM INCLUDING CIRCUITRY FOR SUPERIMPOSING HIGHER FREQUENCY CONTROL SIGNALS ON A SUPPLY LINE CARRIER WAVE
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3452329 |
SUPERVISORY CONTROL SYSTEM
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3440607 |
CYCLICALLY SCANNED REMOTE ELEMENT OPERATING SYSTEM WITH ANSWER BACK
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3413605 |
Synchronous remote element operating system with answer back
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3330914 |
Signalling systems
A resistor network is connected to a two wire line and used to detect and overcome changes of direct current levels without disturbing any alternating current signals superimposed thereon. Direct... |
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3319225 |
Remote control system including a frequency discriminating delay circuit
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3317895 |
Control of remote telephone and like equipments
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3289191 |
Solenoid selection arrangement
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3237163 |
Apparatus for testing circuit elements in a pulse responsive remote control system
979,488. Selective-signalling systems. R. C. VOISIN. Jan. 26, 1961 [Jan.27, 1960], No. 3096/61. Heading G4H. In a system for operating a relay or other device, a first check pulse train of... |