Patents Examined by Jin F. Ng
  • Patent number: 5283637
    Abstract: An improved telecommunication system is provided which allows the transmission of full motion color video, voice and data over a communications link formed of a twisted pair of wires of the type currently utilized only for voice and data communications. The signal is transmitted over the twisted pair link as a broadband signal up to a distance of six thousand feet. The twisted pair link exhibits a known impedance to the signal, depending upon the lengths of the twisted pairs of wires in the link. As the signal is received from the twisted pair link it is amplified and an impedance proportional to the impedance of the twisted pair link and vectorially opposite thereto is impressed thereon. A unity gain is achieved whereby the signal degrading effects of the impedance of the twisted pair link are reversed. This results in the accurate reproduction of a video signal over a link including significant lengths of conventional twisted pairs of telephone wires.
    Type: Grant
    Filed: August 20, 1990
    Date of Patent: February 1, 1994
    Assignee: Christine Holland Trustee/Goolcharan Trust
    Inventor: Boysie M. Goolcharan
  • Patent number: 5283836
    Abstract: A loud speaker element including a frame which supports a planar diaphragm, an electric conductor in the form of a coil or grid being secured to the diaphragm, and magnetic field generating means being provided to generate magnetic fields which intersect the conductor. The element is characterized in that the diaphragm is made of lightweight, woven cloth having open mesh. The conductor is secured to a first region of the diaphragm. The open mesh at the first region is closed by means such as lacquer or stencil film. The second region of the diaphragm surrounds the first region. The frame covers the second region and acts as a baffle to prevent signal cancellation at lower frequencies.
    Type: Grant
    Filed: March 23, 1992
    Date of Patent: February 1, 1994
    Inventor: Anthony L. Trufitt
  • Patent number: 5283819
    Abstract: A remotely controllable computing and multimedia entertainment system includes a personal computer (24) having an entertainment circuit (12) made up of a radio frequency circuit (48), a television circuit (46), and an audio multimedia circuit (18). A remote control circuit (50) provides programmable control of the entertainment circuit (12) to select among computer function operation, television and radio operation, and audio operation. An analog mixing circuit (70) within the audio multimedia circuit (18) provides mixing for a plurality of analog audio signals. A telephone circuit (44) integrates data, fax, and voice telephone signals in the entertainment circuit (12). A volume control circuit (318) within the audio multimedia circuit (18) provides varying volume, bass, and tone levels for each audio signal received by the analog mixing circuit (70). The analog audio signals received by analog mixing circuit (70) may include monaural and stereo audio signals.
    Type: Grant
    Filed: April 25, 1991
    Date of Patent: February 1, 1994
    Assignee: Compuadd Corporation
    Inventors: James A. Glick, Ronald B. Graczyk, Albert F. Nurick, Brittain D. Fraley
  • Patent number: 5283638
    Abstract: A personal computer workstation (10) for processing and communicating data which comprises, in combination, a personal computer chassis (20). Chassis (20) includes host computer (24) with memory (42) and a plurality of ports for communicating data signals. Telecommunications circuitry (12) within chassis (20) processes telecommunications data and communicates telecommunications data to host computer (24) and ports. Audio multimedia circuitry (18) within chassis (20) processes audio multimedia data and communicates audio multimedia data to host computer (24) and ports. An interface bus (300) within chassis (20) and associated with telecommunications circuitry (12) and audio multimedia circuitry (18) integrates telecommunications data and audio multimedia data to produce multimedia telecommunications data for processing and storage within host computer (24) and communication of the integrated multimedia telecommunications data external to chassis (20).
    Type: Grant
    Filed: April 25, 1991
    Date of Patent: February 1, 1994
    Assignee: Compuadd Corporation
    Inventors: Daniel K. Engberg, Albert F. Nurick, Brittain D. Fraley
  • Patent number: 5283835
    Abstract: An acoustic transducer is formed by a rigid substrate and a strip of a laminated sheet material including an intermediate layer of a ferroelectrical material sandwiched between inner and outer layers of a conductive material. Two lines of conductive epoxy supply an AC signal across the full height of the inner and outer layers. The ferroelectric layer is preferably a piezoelectric plastic such as PVDF with a preferred direction of displacement oriented laterally across the strip. The strip is preferably secured in a groove in the substrate by a cement having acoustical properties closely matching those of the strip and the substrate. The strip is curved in a parabola by its own tension. The strip is sufficiently stiff to be self supporting without the use of a foam or rubber backing layer. The conductive layers are preferably each a layer of copper overlayed with a layer of nickel.
    Type: Grant
    Filed: November 15, 1991
    Date of Patent: February 1, 1994
    Inventor: Lewis S. Athanas
  • Patent number: 5282242
    Abstract: A facsimile apparatus (1) is provided with a function of making a facsimile communication through a telephone line (2). The facsimile apparatus includes: a memory device (8) for storing information to indicate a condition related to the facsimile communication; a voice data storing device (15) for storing predetermined various kinds of voice data; a speech signal synthesizing device (16) for synthesizing a speech signal on a basis of the stored information and the stored voice data; and a transmitting device (3) for transmitting the synthesized speech signal onto the telephone line (FIG. 1).
    Type: Grant
    Filed: June 3, 1993
    Date of Patent: January 25, 1994
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Masayuki Hachinoda
  • Patent number: 5282239
    Abstract: A cordless telephone system serves a building with a moving conveyance such as an elevator. The system has at least one portable cordless telephone, at least one fixed base station that communicates with the portable cordless telephone by a wireless circuit outside the moving conveyance, and a moving-conveyance base station that communicates with the portable cordless telephone by a wireless circuit inside the moving conveyance. A central switch routes calls to the fixed base station or moving-conveyance base station according to the field strength of signals received at these stations from the portable cordless telephone.
    Type: Grant
    Filed: July 8, 1992
    Date of Patent: January 25, 1994
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Yuji Yokoi, Takehiro Inoue
  • Patent number: 5282245
    Abstract: A bi-directional noise-cancelling microphone comprising a detector for detecting acoustical signals centrally positioned within a tubular member that has flared entries. The microphone provides a bi-polar response pattern, and effectively cancels unwanted noise incident upon the microphone at the sides of the tubular member, as well as noise above a particular frequency dictated by the length of the tubular member. By providing flared entries to the tube, the maximum peak response frequency of the microphone is extended up to 40% higher than that achieved with a similar tubular member with non-flared entries. An embodiment of the tubular bi-directional microphone with flared entries is disclosed wherein the microphone is provided with a two-stage pop filter system. The pop filter system includes a first screen covering the front entry of the microphone housing. A second screen is constructed so as to vent the first screen, thereby preventing pop signals from being produced.
    Type: Grant
    Filed: April 1, 1992
    Date of Patent: January 25, 1994
    Assignee: Shure Brothers, Incorporated
    Inventor: Carl R. Anderson
  • Patent number: 5282238
    Abstract: A communication system which enables conventional telephone-type facsimile apparatus to reliably and efficiently communicate over a conventional two-way voice radio communication system. The system includes an interface unit which is connected to the facsimile apparatus and to the transceiver apparatus of the radio communication system without modification to either unit. The interface unit transmits and receives information over the radio system in the form of a series of data packets, each containing origin address, destination address, send sequence and check digit information for optimum transmission accuracy and efficiency. A confirmation packet of like send sequence sent by the receiving unit when received at the transmitting unit verifies transmission. In the absence of such verification the data packet is retransmitted.
    Type: Grant
    Filed: April 16, 1991
    Date of Patent: January 25, 1994
    Assignee: Silicon Engines, Ltd.
    Inventor: Kerry Berland
  • Patent number: 5282253
    Abstract: A bone conduction microphone which fits into the ear of the user and which has means which abuts against the pinna of the ear causing a counteracting force to resiliently push the device against a wall of the ear canal nearest the back of the head, where bone conducted vibrations are detected most efficiently.
    Type: Grant
    Filed: February 26, 1991
    Date of Patent: January 25, 1994
    Assignee: Pan Communications, Inc.
    Inventor: Masao Konomi
  • Patent number: 5282251
    Abstract: A portable speaker system for the hearing impaired, comprising at least two speakers mounted on a framework which can be moved easily around a room, and specifically moved to allow one speaker to be directed at the left ear, and the other speaker directed to the right ear. As the speakers are adjustable in their direction, and volume, a person with impaired hearing can position the speakers at the side of their chair, adjust the volume as required, and hear the audio sound at their level of volume, while persons with normal hearing are allowed to hear the same audio sound at normal levels. In another embodiment of this invention, each speaker can be connected to a separate sound source, to produce a stereo effect.
    Type: Grant
    Filed: August 3, 1992
    Date of Patent: January 25, 1994
    Inventor: Jack N. Petersen
  • Patent number: 5281863
    Abstract: A circuit for generating a square-wave output signal that is a frequency multiple of and substantially in phase with a reference input signal is described. The invention provides a phase-locked loop frequency multiplier circuit with a square-wave output signal that is substantially in phase with the reference input signal.
    Type: Grant
    Filed: March 26, 1992
    Date of Patent: January 25, 1994
    Assignee: Intel Corporation
    Inventors: Joseph R. Bond, Privavadan R. Patel
  • Patent number: 5281965
    Abstract: A vehicle detector includes one or more inductive sensors connected to an oscillator circuit. A timing circuit defines a plurality of sequential measurement frame segments. The oscillator circuit is coupled to an inductive sensor during each of the measurement frame segments. The time duration of each of the plurality of measurement frame segments is measured. After the completion of each frame segment for a particular inductive sensor, a total measurement frame time duration for that sensor is calculated based upon durations of a predetermined number of measurement frame segments for that sensor. The total measurement frame time duration and a reference time duration are compared and a difference is determined. If the difference between the total measurement frame time duration and the reference time duration exceeds a threshold value, an output signal indicative of the presence of a vehicle in the vicinity of the inductive sensor is generated.
    Type: Grant
    Filed: June 17, 1991
    Date of Patent: January 25, 1994
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Earl B. Hoekman, Samuel Bernard, Jr.
  • Patent number: 5282252
    Abstract: Audio equalizer circuit for adjusting the amount of boost and cut. The circuit uses a combination negative feedback, positive feedback, negative feed-forward and positive feed-forward resulting in boost and cut characteristics which are entirely reciprocal and which, nonetheless provides an infinite-depth notch. The equalizer is fabricated with an ordinary band pass filter, resistors, potentiometer and operational amplifiers.
    Type: Grant
    Filed: February 27, 1992
    Date of Patent: January 25, 1994
    Assignee: AKG Acoustics, Inc.
    Inventor: Robert A. Orban
  • Patent number: 5280268
    Abstract: A vehicle security system has a combination lock type switch which controls engine starting and at least one other critical engine function; activates an alarm; and which causes an incapacitating substance, such as tear gas, to be introduced to the vehicle interior. The combination lock type switch controls appropriate solenoid valves and switches to accomplish the above purposes. This combination switch, a replenishing port, and a visible alarm are the only visible components. The remaining components are concealed behind the dashboard or beneath the floor of the vehicle.
    Type: Grant
    Filed: May 15, 1992
    Date of Patent: January 18, 1994
    Inventor: Edward J. Matthews
  • Patent number: 5280633
    Abstract: This active antenna is incorporated in the terminal station of a system for data exchange with a central station, by the modulation of a microwave carrier. The terminal station is of the chip card type. The modem of the active antenna is constituted by a transistor, the bias current of which is switched over from a low value at demodulation to a high value at modulation. The switch-over is obtained by a circuit with three resistors (R.sub.d, R.sub.gd, R.sub.g), which themselves have their values switched over by two transistors parallel connected with the resistors, these transistors being controlled by two signals emitted by the control circuit of the terminal station. The active antenna can be applied to long-distance data exchange, for example in the remote management of toll-charge systems, remote cash dispensing, localization of moving bodies etc.
    Type: Grant
    Filed: March 14, 1991
    Date of Patent: January 18, 1994
    Assignee: Thomson Composants Microondes
    Inventors: Marc Camiade, Veronique Serru, Dominique Geffroy
  • Patent number: 5280541
    Abstract: A method for re-establishing a communication link that has been lost between a portable unit (406) and a fixed unit or base station (402) provides for a way of quickly re-establishing the lost communication link, on the previously used RF channel. The method is begun by transmitting a link re-establishment code word (900) using MUX 1 after determining that synchronization has been lost (502) for a predetermined period of time (504). This is followed by automatically switching the portable unit (406) from MUX 1 to MUX 3 communication protocol. Followed by re-establishing communication (re-establish synchronization) between the portable (406) and base station (402) in MUX 3 and switching the two communication devices (402 and 406) back to MUX 1 after the communication link has been re-established. The same steps can be followed by base site (402) if it had been the first to detect loss of the communication link.
    Type: Grant
    Filed: October 24, 1991
    Date of Patent: January 18, 1994
    Assignee: Motorola, Inc.
    Inventors: Paul D. Marko, Stelios J. Patsiokas, Craig P. Wadin
  • Patent number: 5280631
    Abstract: A polarization diversity radio communication system suitable for radio communication in indoor space is provided for transmitting from a transmitter a series of data sequentially from one of two or more transmission antennas of the transmitter, and for reproducing the data received at a receiver through a single reception antenna of the receiver when the series data are received from the transmitter. Thus, the transmitted data from any part of the indoor space can be received efficiently, and a high S/N ratio can be assured on the reception side.
    Type: Grant
    Filed: March 4, 1992
    Date of Patent: January 18, 1994
    Assignee: Matsushita Electric Works, Ltd.
    Inventors: Kazuo Nakahi, Hiroshi Umeyama, Shigemi Sakurai, Kuniharu Tatetsuki
  • Patent number: 5280519
    Abstract: A communication apparatus which can carry out a facsimile communication with a calling station and a speech communication with the calling station.
    Type: Grant
    Filed: January 16, 1992
    Date of Patent: January 18, 1994
    Assignee: Ricoh Company, Ltd.
    Inventors: Masato Nakajima, Osamu Suzuki
  • Patent number: 5280515
    Abstract: A fault processing system processes a fault which is generated in one or a plurality of producing points which design and produce products according to orders received from customers. The fault processing system includes a first producing point which is used as a center producing point, second producing points, and one or a plurality of communication networks coupling the first and second producing points. Each of the second producing points comprise a first device for detecting a fault generated in a program module of the second producing point and a second device for notifying the fault and information identifying program module in which the fault is generated to the first producing point responsive to the first device. The first producing point comprises a third device for analyzing the fault notified from the second producing point depending on whether the program module in which the fault is generated is a common program module or a particular program module based on the information.
    Type: Grant
    Filed: July 10, 1991
    Date of Patent: January 18, 1994
    Assignee: Fujitsu Limited
    Inventor: Mamoru Nagatsu