Matches 151 - 200 out of 220 < 1 2 3 4 5 >
Match Document Document Title
5028918 Identification transponder circuit  
A phase encoded transponder circuit is disclosed which may be a passive device capable of response to an interrogating signal and is capable of transmitting an individual unique identification...
5025253 System and method for remotely monitoring the connect/disconnect status of a multiple part vehicle  
An apparatus and method for monitoring the status of a multiple part vehicle. An apparatus according to the invention comprises a tag for placement on a second part of the vehicle. The tag...
5006996 System of conveying, storing, retrieving and distributing articles of manufacture  
A physical distribution system having a shelf storage unit for storing at least one article; a conveying unit having a terminal unit for conveying an article to and from the shelf; a memory unit...
4952928 Adaptable electronic monitoring and identification system  
A personnel monitoring system includes a transmitting or transponding unit that is worn or carried by the individual being monitored. This transmitting or transponder unit periodically, or upon...
4937586 Radio broadcast communication systems with multiple loop antennas  
The invention comprises a low power broadcast system that is applicable especially to the so-called "electronic shelf" for retail stores, wherein the shelf edge carries price displaying modules...
4924211 Personnel monitoring system  
A system for monitoring presence of persons at preselected monitoring locations. A plurality of local units, one at each monitoring location, determines whether the monitored person is present or...
4924210 Method of controlling communication in an ID system  
A memory of a data carrier attached to an article to be identified stores a classification code indicative of the data carrier's own communication protocol. Plural types of communication protocols...
4897642 Vehicle status monitor and management system employing satellite communication  
Apparatus and method for monitoring the status of a multiple part vehicle are disclosed. Apparatus according to the invention comprises a tag on a second part of the vehicle which impresses a...
4881061 Article removal control system  
A system for controlling removal of articles from a facility by authorized users transmits data to, and receives data from, an article inventory control system and an electronic article...
4868816 Polling communication method  
A polling communication method which asks whether or not there is a request with data from a range of answer requesting terminals. A request is determined by a binary looking-up to terminals by a...
4864274 Remote reading thermostat  
An information transmission system using a pair of transmission interconnections to supply power from a collection station to an operating station, and to transmit information back based on the...
4864519 Information transmission system  
A driving device forming part of a controller is connected in a circuit and supplies power to a number of stations in the circuit. Each station has a microcomputer and at least one sensor capable...
4823118 Fire sensor  
A fire sensor of the polling type in which plural fire sensors connected via a common line to a central monitoring point are called in sequence in accordance with individual addresses, wherein an...
4780910 Display for a remote receiver in an electrical utility load management system  
A method and apparatus for monitoring and testing the operation and configuration of a remote receiver in an electrical load management system. The receivers are responsive to encoded command...
4685149 Meteor scatter burst communication system  
The specification discloses a meteor burst communication system including at least two spaced apart master stations, in association with a plurality of groups of remote stations spaced at locations...
4672374 System for bilateral communication of a command station with remotely located sensors and actuators  
A remote sensing and control system wherein a plurality of remote sensing units are connected to a central control and monitoring console by only four interconnecting wires. A clock signal is...
4668939 Apparatus for monitoring disturbances in environmental conditions  
An improved apparatus for detecting environmental disturbances such as the occurrence of a fire, a gas leak or the like, includes a central processing unit and a plurality of terminal detectors,...
4658243 Surveillance control apparatus for security system  
In a polling type surveillance control apparatus for a security system, inherent addresses are assigned to respective terminal devices such as smoke detectors, temperature sensors, gas leakage...
4630042 Wired commodity vending system  
A wired commodity vending system which comprises a plurality of slave stations each having an automatic vending machine including an outer door and an inner door and a controller for preparing and...
4618861 Passive activity monitor for livestock  
An estrus detection system using a transponder mounted to an animal and including a motion sensor. The motion sensor produces a series of pulses as a function of movement. A counting circuit is...
4616223 System of identifying local stations by a central interrogating station  
A station identification system comprising a central interrogating station (10) and M local stations (100, 200), etc. arranged in parallel with each other along a transmission bus (20) which...
4596984 Digital data input circuit  
In a digital data input circuit, a number of switches arranged in matrix of m rows by n columns (m, n: integer being equal to one or more) are operated in ON/OFF state and signals are obtained to...
4575720 Data acquisition transmitter and receiver  
A transmitter has a plurality of parallel inputs, and each input is connected to a switch. The transmitter receives a trigger signal that has a constant frequency. Using the trigger signal, the...
4568919 Monitoring system including a number of measuring stations series connected to a signal line  
In the monitoring system which is intended for buildings, rooms and objects a multitude of measuring or detecting and signaling stations are series connected to a central signal station. Each of...
4551710 Method and apparatus for reporting dangerous conditions  
In an alarm system a central signal station periodically transmits interrogation signals, preferably in the form of infrared radiation packets to remotely located detectors which transmit a...
4514731 Coded information arrangement  
An active transponder of an identification system comprises a memory for storing coded information and supplying it to a transmitter output, and data means independent of the memory for supplying...
4509093 Electronic locking device having key and lock parts interacting via electrical pulses  
Disclosed is an electronic locking device including electrically interacting key part and lock part each including electronic data processor with an inner code which is particular for a pair of key...
4477809 Method for random-access radio-frequency data communications  
A method for random-access data communications to and from a central controller, from and to at least one of a plurality of remote stations, by providing at least one radio-frequency channel having...
4468813 Digital voice storage system  
A digital voice storage system adapted for use in a multiple unit land mobile radio communications system. The system utilizes a PSK signalling system with fixed length data packets to control a...
4400694 Microprocessor base for monitor/control of communications facilities  
A monitor/control system for a communications network with an independent microprocessor at each repeater station and at the terminal, and in which alarms and monitored conditions are detected on...
4398172 Vehicle monitor apparatus  
A vehicle monitor (10) apparatus for monitoring vehicles (14) in a monitoring location (17). A vehicle unit (12) mountable in a vehicle includes circuitry (21) for transmitting, on a continuous...
4375637 Integrated alarm, security, building management, and communications system  
A fully integrated alarm, communication, and building management system has a central control station and a plurality of remotely located sensing and controlling devices. Each remote device has an...
4367458 Supervised wireless security system  
An ultrasonic communication system capable of wireless installation and supervised operation is achieved by communicating each information bit as two distinct ultrasonic frequencies separated in...
4366481 Vending machine acquisition system  
Data from vending machines are acquired by a resident data acquisition unit (DAU) implanted in each vending machine. This unit senses coins in, coins out, products dispensed and door openings,...
4361903 Data transmission process in a CATV system  
In a bidirectional CATV system, terminal devices at individual subscriber locations are arranged in sets, with each terminal device in a set being coupled to an intermediate polling processor which...
4361832 Automatic centralized monitoring system  
An automatic centralized monitoring system capable of monitoring various sensors in a plurality of premises with rapidity; this is accomplished by combining the premises into a plurality of groups;...
4360912 Distributed status reporting system  
A modular bus system for reporting the status of a plurality of geographically distributed data points. The data points may be independently located or grouped with the status of each being...
4342986 Central station alarm reporting system  
A central station alarm reporting system having a remote premises unit which is polled by the central station using FSK messages and reports its alarm information in DTMF (dual tone multifrequency)...
4303904 Universally applicable, in-motion and automatic toll paying system using microwaves  
Toll collection facilities for tunnels, bridges and turnpikes slow traffic, waste time and fuel, and increase air pollution. Eliminating the need for a toll payment stop would avoid this waste and...
4301445 Communication system and method having wide dynamic range digital gain control  
An automatic gain control system and method, utilizing a digital logic attenuator and control in a communication receiver, operates linearly over a wide dynamic range in the amplitude of input...
4251797 Vehicular direction guidance system, particularly for interchange of information between road mounted units and vehicle mounted equipment  
A circuit is provided to detect the direction of movement of the vehicle with respect to a fixed road mounted loop, which can then extend over opposing lanes of a highway network, the direction...
4196418 Detection plate for an identification system  
A detection plate for an identification system, comprising a resonant circuit, a switching device, and coding means, characterized in that the coding means comprises a digital circuit and is...
4114141 Digital communication system for transmitting digital information between a central station and a number of remote stations  
A communication system is disclosed for transmitting digital information between a central station and a large number of remote stations. Digital information is identified by the relationship...
4035772 Utility meter reading system  
A number of remote terminals are connected to various utility meters to store the readings therein. A central terminal sequentially transmits signals to the remote terminals to actuate the same to...
4014004 Automatic report register  
A report register, for use in conjunction with radio receiver-transmitter of a mobile unit, such as a ship, for receiving, storing and displaying stored data, and being responsive to interrogation...
3908894 Automatic money-dispensing system  
An automatic money-issuing system adapted to automatically issue bank notes and a necessary amount of money of predetermined denominations with the aid of a tape information input or a manual...
3882465 Remote control system having command and address signals  
A signaling system located at a central station sequentially interrogates a plurality of remotely located transponders. Means are provided for interrupting the normal addressing sequence and for...
3815093 SIGNALING SYSTEM UTILIZING FREQUENCY BURST DURATION AND ABSENCE FOR CONTROL FUNCTIONS  
A signaling system has a plurality of remote transponders, which transmit signals, representative of the states of sensors associated with the transponders, to a central station in response to...
3705385 REMOTE METER READING SYSTEM  
A system for selectively obtaining information from a plurality of remotely located data registers including a mobile or stationary transmitter for transmitting coded signals representing the...
3634824 SIGNALING SYSTEM UTILIZING FREQUENCY AND FREQUENCY DURATION FOR SIGNALING AND CONTROL FUNCTIONS  
A signaling system having a plurality of remote stations for detecting the states of monitors associated therewith and for transmitting a signal representative of said states along signal...
Matches 151 - 200 out of 220 < 1 2 3 4 5 >