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| Patent # | Description |
|---|---|
| US-4,679,252 |
Fiber optic receiver having a method and an apparatus for data clock
extraction A fiber optic receiver having a data clock extractor which fully rectifies an AMI-encoded data stream, detects the negative going peaks between bit cells which... |
| US-4,679,251 |
Optical receiver In an optical receiver for the reception of a modulated light beam, the beam falls on a PIN diode connected to the input of an amplifier which has a feedback... |
| US-4,679,250 |
Optical repeaters An optical repeater for a submersible transmission system has a steel housing and a modular assembly carrying the electronic and opto-electronic components. Each... |
| US-4,679,249 |
Waveguide-to-microstrip line coupling arrangement and a frequency
converter having the coupling arrangement In a waveguide-to-microstrip line coupling arrangement, a microstrip line is placed on an outer surface of a wall of a waveguide which is coupled with the... |
| US-4,679,248 |
Test equipment for simulating multipath interference The invention relates to a device for simulating multipath interference in order that the correction stages of a radio receiver can be tested. The device... |
| US-4,679,247 |
FM receiver An improved FM receiver is disclosed incorporating improved oscillating limiter circuitry having an electrically tunable bandpass filter and variable attenuator... |
| US-4,679,246 |
One-shot tuning circuit A one-shot tuning system for microprocessor controlled tuning systems uses a table look-up (105) to provide an offset value in response to a deviation error in... |
| US-4,679,245 |
Radio receiver A linearity control system comprises a current controlling circuit responsive to a meter control signal for controlling the current flow through the meter so as... |
| US-4,679,244 |
Method of transmitting terminating call signals within a restricted
duration and a base station and a portable... A portable unit that may be called from a base station through a radio control channel by a succession of terminating call signals that is sent through the... |
| US-4,679,243 |
Data transmission using a transparent tone-in band system When modems are used in SSB systems a problem arises in controlling variable data rates. If a transparent tone-in band system is used, the notch in the band... |
| US-4,679,242 |
Convertible cooler and cushion A variable volume insulated container is manufactured from a flexible cover and a laminated insulator. The laminate is constructed of at least one layer of air... |
| US-4,679,241 |
Method and apparatus for correcting x-y position measurements A two-dimensional coordinate measuring pad for use, for example, to recognize handwriting. A high resistivity sheet is bounded by a lower resistivity border... |
| US-4,679,240 |
Touch sensitive hearing aid volume control circuit A touch sensitive electronic volume control circuit so that the gain of an amplifier can be changed to any level from zero to maximum and the gain can be... |
| US-4,679,239 |
Apparatus and method for processing stereo signals for application to an
AM stereo broadcasting unit In a system for processing stereo signals prior to application to an AM stereo channel information, the signals prior to broadcasting left channel and right... |
| US-4,679,238 |
Method and system for signalling additional information by AM medium
wave broadcasting To permit transmission of traffic information by amplitude modulation in the medium wave band without disturbing audio signals being broadcast, a stereo pilot... |
| US-4,679,237 |
Correction control circuit for AM stereophonic receivers A correction control circuit for use in compatible AM stereophonic receivers of the type utilizing a cosine correction signal to remove inherent distortion from... |
| US-4,679,236 |
Identification verification method and system A secure system provides identification verification by transmission of an access number, preferably a random number, from a central processor to a remote... |
| US-4,679,235 |
Television signal transmission system A television signal transmission system transmits a television signal having a polarity inverted portion in association with a scene change and a polarity... |
| US-4,679,234 |
Telephone cord twist restrainer A telephone cord twist restrainer which is comprised of a rudder-like plate which is attached to a coiled telephone cord by means of slotted holes formed in the... |
| US-4,679,233 |
Microphone This microphone includes a microphone element, speaker and antenna all internal to the microphone housing. These components are carried by a chassis that is... |
| US-4,679,232 |
Method and apparatus for providing a ground reference for telephone
customer special circuits powered from a... When a floating battery feed circuit is used to power telephone lines, it is desirable to provide an anti-corrosion biasing circuit to keep the voltage on the... |
| US-4,679,231 |
Telephone accessory housing A casing for an auxiliary device to optically display an incoming telephone call includes a bottom portion which is detachably connected to a cover portion.... |
| US-4,679,230 |
Echo canceller and center clipper control arrangement This arrangement is intended to control the operation of the coefficients adjusting circuit (12) of an echo canceller and of the operation of a center clipper... |
| US-4,679,229 |
Ringing detection circuit A ringing detection circuit for accurately detecting a ringing having opposite polarities which arrive over a telephone subscriber's line. After the detection of... |
| US-4,679,228 |
Speakerphone sensing circuit An apparatus for indicating to a central service unit of a telephone system having a central service unit coupled to a plurality of station sets whether a... |
| US-4,679,227 |
Ensemble modem structure for imperfect transmission media A high-speed modem that transmits and receives digital data on an ensemble of carrier frequencies spanning the usable band of a dial-up telephone line. The modem... |
| US-4,679,226 |
Computer security guard circuit A circuit (16) is designed to prevent unauthorized access to a remote device such as a computer (10) over a communications system such as a telephone network... |
| US-4,679,225 |
Signal transmission apparatus for a multiple channel system and method
for using the same Signal transmission apparatus is provided for a communications system having a plurality of transmitters for transmitting information signals over any one of... |
| US-4,679,224 |
Telephone line testing circuit A telephone line testing circuit for determining whether a fault exists on a telephone line entering a customer's premises or whether the fault exits in the... |
| US-4,679,223 |
Method for damping the natural oscillations of a pillar-stand carrying
X-ray equipment, occuring when making... A movably mounted pillar-stand for carrying X-ray equipment, the pillar-stand preferably celling-suspended and having a pendulum arrangement or the like for the... |
| US-4,679,222 |
Method and means for marking X-ray film with identifying indicia The present invention uses the patient's history form for marking the patient identification indicia on to the X-ray for the patient. A patient identification... |
| US-4,679,221 |
CT X-ray collimator including a reinforced collimator blade assembly A collimator blade assembly for a computed tomographic X-ray scanner comprising a blade of X-ray beam stopping material having an aperture for passing X-rays and... |
| US-4,679,220 |
X-ray tube device with a rotatable anode An evacuated envelope is formed with a portion of larger diameter and tubular portions extending along the axis on both sides of the portion of larger diameter... |
| US-4,679,219 |
X-ray tube An X-ray tube is disclosed, which comprises an evacuated envelope having a cathode assembly and an anode assembly provided at the opposite ends of the envelope... |
| US-4,679,218 |
X-ray diagnostic installation having a control system for the x-ray tube
high voltage A control system for the x-ray tube high voltage supply in an x-ray diagnostic installation has a switching device for switching between two circuits for... |
| US-4,679,217 |
X-ray cassette structure A structure for use in determining the amount of radiation, e.g., X-ray radiation, received at one or more selected regions of an object, which structure... |
| US-4,679,216 |
Synchronous binary counter A synchronous binary circuit comprising a counter including J-K flip-flops constituting lower l bit stages and higher m bit stages, first logic means for... |
| US-4,679,215 |
Exceedance counting integrating photo-diode array The use of a comparator and counter associated, on-chip, with each photo-element of an array. Sensing each photo-element without discharging it and allowing each... |
| US-4,679,214 |
Shift register for refreshing a MIS dynamic memory A shift register having a simple circuit structure and used, for example, in a dynamic RAM device for a refresh operation. The shift register includes a... |
| US-4,679,213 |
Asynchronous queue system A queue form of asynchronous register is disclosed with signal paths commonly carrying elements of both data and control. Binaries are intercoupled in two... |
| US-4,679,212 |
Method and apparatus for using surface trap recombination in solid state
imaging devices The specification discloses a charge transfer imaging device (10) having a charge removal gate (26). Pulses (30) of sufficient amplitude and frequency are... |
| US-4,679,211 |
Regulation of picture size with varying scan frequency The output voltage of a variable output voltage power supply is supplied to the deflection system of a raster scanned CRT and is controlled by a frequency... |
| US-4,679,210 |
Soft-limited digital pulse compressor A circuit is provided for correlating both the phase and amplitude of received radar signals with the phase of a transmitted binary reference phase code, which... |
| US-4,679,209 |
Digital line receiver A stream of high-speed bipolar signals transmitted along standard twisted pair telephone wiring are detected by a circuit that includes a pair of differential... |
| US-4,679,208 |
Equalization system tuning device which updates equalizer coefficients
based on selected decision regions An equalization system wherein a signal received over a line is equalized and the quantity of equalization is compensated based on a difference, or error,... |
| US-4,679,207 |
Single channel tracking for frequency hopping communication systems A single channel antenna tracking system for frequency-hopping communication systems. The tracking system utilizes the synchronization pulses accompanying the... |
| US-4,679,206 |
Electrode joint thread form The probability of thread damage during the joining of carbon or graphite electrodes having tapered threaded projections or sockets is reduced by an improved... |
| US-4,679,205 |
Tiltable metallurgical furnace vessel In a tiltable metallurgical furnace vessel having a completely closed lateral protrusion with a closable discharge opening on its underside, simplified furnace... |
| US-4,679,204 |
Rear mirror holder device for a laser generator A holder for the rear mirror of a laser generator has a pressure balance orifice formed in the block supporting the rear mirror in the mirror mounting member.... |
| US-4,679,203 |
Magnetically induced pulser laser excitation system A novel excitation scheme has been developed for discharge lasers. The technique uses an auxiliary circuit based upon pulse transformer technology to induce a... |
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