Matches 1 - 50 out of 109 1 2 3 >
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7049954 Data transmission system  
A data transmission system for short but frequent data pulses comprises a transmitter ( 10 ) and a receiver ( 12 ). The transmitter comprises a pseudo-random signal generator ( 16 ) which governs...
7049752 Light emitting diode control device  
A control device of LEDs includes a lighting-up circuit and a lighting-out circuit, both of which generate pulse signals being pulse-width modulated by varying cycles and corresponding duty ratios...
6975206 Method for communication between central terminal and multiple transponders  
A method of communicating information from first and second transponders (or multiple transponders) to a central monitoring device, and a communications apparatus, are disclosed. The method...
6943696 Protocol for avoiding interference between transmission devices  
Systems and methods for preventing signal jamming within a consumer electronics system comprising a remote control, interpreting device, and audio/video device. A plurality of primary messages are...
6816070 Method of generating an alert for walkie-talkie when out of communicatable distance  
A method of generating a warning signal for a walkie-talkie includes: providing a detector and a timer; using the timer to count time; using the detector to determine whether the strength of a...
6714137 Protocol for avoiding interference between transmission device  
Systems and methods for preventing signal jamming within a consumer electronics system comprising a remote control, interpreting device, and audio/video device. A plurality of primary messages are...
6556124 Knocking activated device and method for operating an electromechanical device responsive to a control signal  
A knocking activated device and method for operating an electromechanical device responsive to a control signal. The knocking activated device has a vibration transducer for generating a signal in...
6294980 Transponder with a frequency detector for protection of security-related data during contactless inductive communication, and an integrated circuit therefor  
A transponder (1) for the contactless communication with a base station (2) comprises an antenna resonant circuit (10) for receiving a modulated HF signal (5), signal processing means (13) for...
6263069 Impact activated telephone method and apparatus  
A method and apparatus for activating an emergency telephone mounted upon a structure, wherein the telephone is activated as a result of an impact by an object upon the structure causing the...
6225916 Remote control signal reception controller  
The remote control signal reception controller receives control data transmitted from a remote control signal sender. The remote control signal reception controller informs a CPU that controls a...
6147719 Pulse position modulation protocol  
Methods and apparatus for use in communication between a remote control and a receiving unit provide power saving modes of operation and enable remote control use of high data generating devices,...
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 is...
5936540 Process for the management of concurrent access and device for practicing the same  
Process for managing concurrent access permitting the successive input or storage of several slave devices (receiver/transmitter) in the field of action of a master device (emitter/reader) so as to...
5796178 Anti-theft apparatus for a vehicle  
An anti-theft device memorizes the location of the vehicle when the engine stops, receives a signal peculiar to a vehicle (for example, from a key having a transmitter), and permits starting the...
5723912 Remote keyless entry system having a helical antenna  
A vehicle controller is presented for use in a remote keyless entry system for controlling a vehicle device function. The controller includes a receiver for receiving a RF request signal including...
5692127 System for transmitting multiple pulses PPM control signal to wireless device to indicate collision in a wired network while placing data on the network  
A method and apparatus for detecting and indicating a collision on a wireless channel are provided. According to the method, data is transmitted over the wireless channel using pulse position...
5654698 Missile telemetry data interface circuit  
An interface circuit which receives a PCM telemetry data stream comprising waveform divided into 100 words including a three word frame sync signal. The PCM data stream is supplied to a comparator...
5525976 Temperature measuring system  
For temperature measurement at a number of measuring points on, for example, current-carrying bars (2) in a high-voltage switchgear, a data transmitter (1) is used which is arranged near each...
5483231 Remote-control signal receiver for limiting receipt of data during a blanking period  
A remote-control signal receiver includes an input apparatus to input remote-control signals consisting of data trains repeated at a predetermined frequency, a data incorporating apparatus by which...
5387906 Signal receiving control system of a remote control device  
A control system includes receiving module for receiving a signal from a transmitting unit. Also included is a microprocessor including an input port for inputting the signal from the receiving...
5349459 Secure remote control system  
A vehicle access transmitter and receiver pair which cooperate to implement a code transmission strategy which requires a minimum amount of energy thereby accomplishing maximum battery life while...
5323203 Wireless remote control apparatus for camera  
A wireless camera remote control apparatus comprises a transmitter unit for transmitting an activating pulse and a plurality of code pulse signals corresponding to given operations of the camera;...
5271584 Pulse code railway signalling system  
A railway signalling system uses coded electrical information signals to convey vital signal information to wayside signal locations. The coded information signals are in the form of unipolar...
5227779 Codable electronic devices  
Pulses of a carrier signal supplied to an input circuit of a codable electronic device, e.g. a transponder tag, are divided by a chain to provide a logic signal, the value of which depends on the...
5200676 Multiplexed vehicle window wiper control  
A window wiper system for an automotive vehicle provides multiplex encoding of a control switch signal and an additional wiper control signal in a two-channel multiplex control signal and decoding...
5175868 Portable transmitter/receiver apparatus with coded data transmission for reduced interference  
A transmitter/receiver apparatus includes a transmitter and a receiver. The transmitter includes an intermittent signal generator and an intermittent modulator. The intermittent signal generator...
5159332 Proximity identification system with flux concentration in operating region  
A proximity identification system incorporating ferrite rods. The rods are used in both the reader and the tag and additional rods may be used to strengthen and concentrate the flux field in the...
5134347 Low power consumption wireless data transmission and control system  
A low power consumption wireless data transmission and control system 10 is disclosed and in one embodiment, is used to automatically articulate a shade 24 by use of a transmitted command signal...
5128653 Fire alarm system  
A fire alarm system in which an analog type sensor (3) is connected to a transmission line (2) from a receiver (1) and in which one or more on-off type sensor (7) located in the same monitor area...
4931790 Digital remote control method  
A digital remote control method in which interference among different devices is eliminated by the use of a custom code and an instruction code. In accordance with the invention, a transmission...
4928318 Optical signal transmission system including pulsed FM modulator/demodulator  
In the pulsed FM system, the input signal is first modulated into the pulse FM signal. Thereafter, this pulse FM signal is modulated into the pulsed FM signal by the frequency divider. This pulsed...
4870425 Communications system  
A communication system particularly adapted for use in an aircraft collision avoidance system wherein the transmitted portions of messages changed between aircraft consist of pulses or pairs of...
4845773 Method and a system for remotely switching an electrically operated device by the use of signals generated by a telephone  
A switching system and a method of remote switching an electrically operated device by using calling signals generated by a telephone. A switching element is actuated by the system upon detecting a...
4835531 Automobile remote-control system  
An automobile remote-control system is disclosed. This system is characterized such that: a transmitter includes a carrier oscillating circuit for oscillating a carrier with a frequency higher than...
4833467 Data transmission system  
In a digital data transmission system, a transmitting device converts the data to be transmitted into a series of bits, in the form of data pulses. Each data pulse is positioned between successive...
4794371 Remote control apparatus  
A remote control apparatus in which a plurality of loads, assigned to a plurality of load stations, can be individually addressed via a single signal line without the use of complex multiplexing...
4779265 Multiple access communication system  
Methodology, and associated circuitry, for encoding and decoding signals utilize bistate orthogonal code techniques that effect autonomy of communications and simplified signal processing, thereby...
4779266 Encoding and decoding for code division multiple access communication systems  
Methodology, and associated circuitry, for encoding and decoding signals utilize optimizing orthogonal code techniques that effect autonomy of communications and simplified signal processing,...
4768207 Systems for receiving messages transmitted by pulse position modulation (PPM)  
The present invention relates to remote control or trajectory calculation systems for missiles for example, and in particular to a message receiving device which may be mounted on the missle...
4761648 Remote sensing systems  
A security installation comprises sensors arranged in and around a building which transmit digital information to a central station by radio, in each case preceded by an access code specific to the...
4748348 Multi-level pattern detector for a single signal  
A method and apparatus are disclosed which provide for the generation of a trigger signal responsive to the detection of a plurality of selected sequential events in a single monitored signal. A...
4748446 Position coded pulse train  
Pulse position coding is used to transmit several channels of data from a ground radar transmitter to a receiver in an airborne, remotely-piloted vehicle. The system is designed to ignore...
4648101 MLS on-board receiver circuit to decode fast-scanning boosted preamble  
The decoding circuit of the invention comprises essentially a digital filter 16, a pulse-width recognition circuit 17 a pulse peak amplitude selection circuit 23 and a circuit for decoding MLS...
4628494 Method for the remote control of signal acquisition devices by means of a narrow passband transmission channel and a device for the implementation of the method  
In a system for seismic exploration, a narrow passband channel of relatively-slow transmission speed is used to transmit commands from a control station to one or more remote signal acquisition...
4628312 Decoding apparatus and method for a position coded pulse communication system  
Pulse position coding is used to transmit several channels of data from a ground radar transmitter to a receiver in an airborne, remotely-piloted vehicle. The system is designed to ignore...
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...
4584719 Fiber optic workstation datalink interface  
Workstations may advantageously be interconnected in a cluster arrangement wherein multiple "slave" stations utilize the database which exists in a "master" unit. The cluster interface has been...
4582279 Modulation system for railway track circuits  
A modulation system for railway track circuits in which a modulated signal is applied to a section of track for the purpose of detecting the presence or absence of a train on the section. Such...
4580295 System for monitoring optical data bus transmissions  
A circuit (2) used to monitor an electro-optic transmitter (1) associated with an optical data bus (17) senses voltage levels V A applied to an optical transducer (15). The voltage levels V A are...
4555702 Remote control signal reproducing circuit  
A remote control signal reproducing circuit for use in a remotely-controlled receiver which receives a modulated transmission signal subjected to a pulse modulation, reproduces an original remote...
Matches 1 - 50 out of 109 1 2 3 >