Matches 1 - 50 out of 186 1 2 3 4 >


Match Document Document Title
7933565 Transformer coupling of antennas  
Embodiments describe improved coupling of power amplifiers to antennas for the transmission of signals, such as OFDM signals. A large number of separate windings are utilized on a primary side,...
6915146 Method and apparatus for receiving a plurality of different codes at a plurality of different frequencies  
A receiver capable of receiving a plurality of different codes at a plurality of different frequencies is set forth herein. The receiver offers digital frequency control by using a controller...
6838996 Apparatus and method improving safety in the operation of a crane  
The invention is an apparatus and method for improved safety in operation of a crane relative to the transit of a load overhead of workmen. A initiating operator transmits a RF signal to sound a...
6760276 Acoustic signaling system  
An acoustic signaling system comprises a transmitter, which has frequency stability to create sounds which can reliably be received and which is loud enough to be heard by a receiver. The receiver...
6747573 Apparatus and method for generating coded high-frequency signals  
An apparatus and method for generating coded high-frequency signals, having a converter, which converts non-electrical primary energy available from the surroundings into electrical energy, an...
6452490 Home/commercial security monitoring system  
A method and apparatus for communicating between Customer Premises Equipment, (CPE) alarm sensing devices, and alarm monitoring stations. The sensing devices communicate with an end office switch...
6414588 Selective call receiver with improved setting of test mode  
A selective caller receiver which can facilitate easy setting of a test mode without using an exclusive jig and also easy management and adjustment of a receiving unit. In the selective caller...
6392560 Reminding device  
A reminding device to permit the user to determine, at a later date, using a portable device, whether a routine task to secure an object or piece of equipment has been performed.
6373374 Cordless phone system with speech recognition alarm  
A method for transmitting an alarm over a cordless broadcast system having a base station in communication with a mobile unit and a computer. The computer includes a speech recognition system. The...
6137420 Selective call radio receiver and a data transmission method  
In a selective call radio receiver, having a tone dialer function that can transmit as a tone signal a call number of a recipient accompanied by a message, during the transmission of the tone...
6043754 Radio paging receiver having an additional function requiring setting work  
A radio paging receiver comprises a key input unit including an additional function setting switch and a message confirming switch. A closeable cover is provided on the receiver housing for...
6031467 Method in a selective call radio for ensuring reception of advertisement messages  
An SCR (122) that receives personal messages and corresponding advertisement messages, includes a receiver (304), memory (310), presentation circuit (313) and processor (308). The processor is...
5978654 Alphanumeric paging entry system  
A low cost alphanumeric paging entry and page receiving device for entering alphanumeric messages remotely from a telephone and receiving pages via radio frequency signals. The device is designed...
5969635 Radio paging receiver in which announcement of a call is controlled in accordance with a form of a received signal  
In the radio paging receiver having an announcing arrangement for announcing reception of a radio call signal, an operable switch (16) is provided for determining a particular mode relating to an...
5905448 Multipart analog message and a response in a communication system  
A communication system in which a multipart analog message (480) is generated by a controller (112) by including an analog part delimiter (440) between successive independent analog parts (420,...
5815077 Electronic collar for locating and training animals  
A device for locating and training an animal includes a hand held transmitter and a multi-function electronic collar assembly to be worn by the animal. The electronic collar assembly includes a...
5699421 Telephone answering device with low cost dual tone multi-frequency detector  
A telephone answering device (TAD) includes a remote access mode which is operative responsive to dual tone multi-frequency (DTMF) signals. At least three bandpass filters each receive an input...
5583785 Method and apparatus for signal decoder using instantaneous magnitude and phase detection  
Disclosed is a tone decoder (20) that identifies one or more tones encoded on an RF carrier signal for use in controlling various systems and devices located at a remote site. The tone decoder...
5539392 Method for coordinating radio paging transmissions on local and nationwide channels  
To ensure that a user of radio paging services receives page messages while traveling, page messages are broadcast over both the user's local paging channel and a nationwide paging channel during...
5495234 Method and apparatus for length dependent selective call message handling  
A method in a communications receiver (20) for handling a selective call message comprises the steps of measuring a parameter of the selective call message (104, 116) and selecting whether to...
5491836 Method and apparatus for selectively squelching analog signals produced by a paging terminal  
A communication system (200) for providing analog signals comprises a terminal (220) for generating tone and voice signals on tone and voice lines (230, 235), respectively, and a signal processor...
5442696 Method and apparatus for detecting control signals  
The present invention provides a method and apparatus for detecting control signal information for an element of a communication system. The control signal information is included in one or more...
5355126 Selective call system interactive with a wide area selective call system  
An on-site selective call receiver interacts with a wide area selective call system to increase the probability of timely message reception by a selective call receiver capable of operating in...
5287099 Multi-alert radio paging system  
A multi-alert paging receiver of this invention includes a decoder. The decoder constitutes ON durations of alert signals corresponding to the plurality of addresses by using combinations of at...
5276909 Traffic information broadcast system  
A broadcast and reception system provides a segmented broadcast signal for providing regional traffic information and a receiver adapted to receive selected segments of that broadcast. The...
5128980 Automatic paging telephone set and method for controlling thereof  
An automatic paging telephone set comprising first and second DTMF transmitters, a mode selector for selecting either a pager number recording mode, a paging mode, or a general communication mode,...
5117369 DTMF receiver  
A DTMF receiver for a push-button telephone, a facsimile apparatus or the like is disclosed. The DTMF receiver comprises frequency shift delay detection units for lower and higher groups of...
5109220 Selective call controller  
A selective call controller, such as a paging terminal, and a method therefor is provided for receiving calls comprising first and second types of signal, such as numeric/alphanumeric or...
5039984 Paging receiver with programmable areas of reception  
A paging receiver is disclosed which is compatible with transmissions from analog or digital paging transmitters. The paging receiver has a command structure which permits it to be dynamically...
5020094 Cordless telephone network  
A cordless telephone network comprises a base unit (12) that is interconnected into a normal telephone network (19) and a plurality of hand-held cordless telephones (20). Each of the hand-held...
4972435 Frequency independent information transmission system  
The system is used for transmitting information wherein each possible message unit in a set, (e.g. the alpha-numeric symbol set) is defined by a specific interval (I=fs /fR) and messages are...
4928100 Paging receiver for receiving pages from analog or digital paging transmitters  
A paging receiver is disclosed which is compatible with transmissions from analog or digital paging transmitters. The paging receiver has a command structure which permits it to be dynamically...
4922528 Circuitry for recognizing two-tone compound signals in telephone installations  
A circuit is described for recognition of two-tone compound signals of two frequency ranges (F1 to F4, F5 to F8) in telephone installations with a limited transmission band width. Band pass filters...
4875039 Paging system with transmission protocol compatible with analog and digital transmitters  
A paging network is disclosed which utilizes a plurality of distributed switches to transmit pages on a non-real time basis to achieve efficient and low cost transmission. Each of the switches...
4868872 Telephone tone detector  
A tone detector comprising a circuit for detecting multi-frequency dialing (DTMF) signals applied to an input terminal and for generating a "DTMF present" indicating signal, and a circuit for...
4857915 Paging receiver with paging receiver identification code digits transmitted in order of increasing significance  
A paging receiver is disclosed which is compatible with transmissions from analog or digital paging transmitters. The paging receiver has a command structure which permits it to be dynamically...
4856047 Automated remote telemetry paging system  
A remote telemetry unit (RTU) for use in an automated telemetry paging system for providing remote pager notification of changes in selected operating parameters measured at a specific site...
4853688 Paging receiver displaying place of origin of pages  
A paging receiver is disclosed which is compatible with transmissions from analog or digital paging transmitters. The paging receiver has a command structure which permits it to be dynamically...
4818989 Selective calling decoder  
There is disclosed an aircraft selective calling decoder for decoding individual signal tones used in selectively signaling communication of a particular aircraft. The decoder is associated with a...
4776034 Radio communication system operable in cooperation with a VOX system  
In a radio communication system, a mobile station (11) includes a detecting circuit (16) for producing a detection signal during presence of an audio signal, a producing circuit (31) for delivering...
4721955 Paging universal remote control system  
A paging station remote control system capable of providing analog or binary modulation modes is described. Control of the paging base station is effected through a signalling scheme comprising a...
4701759 Call reminder for a radio paging device  
An alerting device, such as a radio pager, which produces an audible alerting signal, in response to a unique identifier received and decoded by said device, incorporates circuitry for periodically...
4654881 Remote control system having symmetrical tone, send/receive signaling circuits for radio communications  
The remote control system having symmetrical signaling circuits for radio communications is coupled to a single wire line/audio channel and permits two or more units, base stations and/or remote...
4644345 Interleaved dual bank encoder  
There is disclosed an encoder comprising means for generating a plurality of tones with every other tone being in a first bank and the remaining tones being in a second bank. The tones are...
4626629 Digital multifrequency signal receiver  
A digital multifrequency receiver circuit of the type employed between telephone system central offices, arranged to provide a faster response to received signals by processing the received signal...
4618860 Radio paging method of arranging message information with reference to a key code and a base station and a pager receiver for use in the method  
In a radio paging method of transmitting message information from a subscriber's substation (32) through a base station (30) to pager receivers (31) in the form of a radio calling signal, the...
4602357 Coded acoustic alarm transmitter/receiver system  
The coded acoustic alarm transmitter/receiver system includes a transmitter for selectively providing both an audible alarm in the audio frequency range and a silent alarm in the ultrasonic...
4602131 Touch tone decoder  
A programmable tone decoder for standard bell system DTMF tone pairs is presented which comprises an integrated DTMF receiver and a means for programming a sequence of digits which are compared to...
4600922 Paging universal remote control encoder  
A paging station remote control system encoder is described. The paging system encoder generates signals in accordance with a predetermined signalling scheme comprising a series of tones and timed...
4599495 Apparatus for multifrequency signalling tone detection  
Apparatus for detection of the presence of signalling tones in telephony is provided wherein the output levels for four band-pass filters in the VF band are processed by means of logic circuits to...
Matches 1 - 50 out of 186 1 2 3 4 >