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| Patent # | Description |
|---|---|
| US-3,979,725 |
Multi-way program branching circuits Disclosed are methods and apparatus for multi-way program branching in a digital computer based on the contents of a data register. This is accomplished by... |
| US-3,979,724 |
Seismic method for determining the position of the bottom of a long pipe
in a deep borehole A method and apparatus for determining the position of the bottom end of a long pipe in a deep water-filled borehole, comprising generating a shock wave in the... |
| US-3,979,723 |
Digital data communication network and control system therefor A digital data communication network in which half-duplex communications are established between a central station and a plurality of remote terminal devices... |
| US-3,979,722 |
Automatic character recognition device employing dynamic programming A character recognition device comprises a memory for memorizing standard patterns, each given by fundamental vectors. A dynamic matching unit finds out a... |
| US-3,979,721 |
Pulse code modulation recording and reproducing apparatus A PCM recording and reproducing apparatus comprising an error detecting circuit for detecting a frame including at least one word information signal with an... |
| US-3,979,720 |
Apparatus for monitoring a redundant multi-channel analog system Apparatus for monitoring a redundant multi-channel analog system and for the forming of an undisturbed mean signal value in which all channels are connected to... |
| US-3,979,719 |
Multiple block binary synchronous duplex communications system and its
method of operation A multiple block binary synchronous duplex communications system provides for the orderly transfer of data from one location to another utilizing communications... |
| US-3,979,718 |
Method of driving a plasma display panel A plasma display panel driving method and system in which a specified one of the panel cells is discharged at all times and electrons produced by the discharge... |
| US-3,979,717 |
Helicopter warning system To prevent inadvertent ground contact of the tail of a helicopter during a landing operation without providing a continuous warning signal for normal landings... |
| US-3,979,716 |
Means and method for transmitting a high count rate pulse signal over a
common well logging cable A conventional type radiation detector in cooperation with a photomultiplier tube provides data pulses of one polarity, corresponding in peak amplitude and... |
| US-3,979,715 |
Method and system for achieving vibrator phase lock An improved controller for vibratory seismic energy sources insures that the energy imparted to the ground by the source is in phase with the reference signal.... |
| US-3,979,714 |
Two-receiver, variable-density logging system An acoustic velocity logging tool employs a transmitter and a pair of receivers. Acoustic pulses from the transmitter pass through the formation surrounding the... |
| US-3,979,713 |
Method of marine reflection-type seismic exploration Seismic exploration method applicable to marine surveys. It involves making a dual spread of detectors which are spaced apart vertically. The signals received at... |
| US-3,979,712 |
Sensor array acoustic detection system An acoustic detection system comprising two arrays of omnidirectional sensors or hydrophones wherein the sensors in each array are disposed along a curved line,... |
| US-3,979,711 |
Ultrasonic transducer array and imaging system An ultrasonic bidirectional transducer array, and an imaging system including said array, wherein the array comprises a plurality of transducer elements each... |
| US-3,979,710 |
Apparatus for adjusting and indicating the operating curve of a
weather-responsive heating regulator A heating regulator which is responsive to effective outdoor temperatures and the temperature of a heated fluid supplied by a boiler. The regulator has an... |
| US-3,979,709 |
Electric fuse having a multiply casing of a synthetic - resin
glass-cloth laminate An electric fuse comprises a fusible element, arc-quenching means surrounding said fusible element, a casing of synthetic-resin-glass-cloth laminate housing said... |
| US-3,979,708 |
Thermostat and anticipator therefor An anticipator for controlling the cycle rate of a thermostat. The anticipator has means for transferring heat supplied thereto, and a negative temperature... |
| US-3,979,707 |
Power-pack assembly A power-pack assembly including a bobbin, at least primary and secondary windings wound on the bobbin and a core carried by the bobbin. Solderless connection... |
| US-3,979,706 |
Shielded inductance coil with trimmer An electrical inductance coil, having a central opening therethrough, is surrounded by a spaced shield of magnetic metal, and a screw of magnetic metal is... |
| US-3,979,705 |
Automotive relay of the hold-in type A hold-in type of automotive relay which when actuated by a first switch controlled exciting current closes its normally open relay contacts and a second switch... |
| US-3,979,704 |
Circuit breaker having members coated with phosphate-chromate protective
layers A circuit breaker, operating in an insulating liquid dielectric environment, switchable between an open position and a closed position, is made of metallic... |
| US-3,979,703 |
Waveguide switch PIN diodes are ineffective as waveguide switches because the device and its connecting leads behave in total as an inductive obstacle. There is described herein a... |
| US-3,979,702 |
Apparatus and method for oversampled transducers in acoustic surface
wave devices Apparatus and method for providing electro-acoustic transducers of an acoustic surface wave device with an increased density of transducer elements. An increased... |
| US-3,979,701 |
Non-recursive digital filter employing simple coefficients A non-recursive digital filter is disclosed, composed of a cascaded plurality of basic sections, each of which is characterized by coefficient values of integer... |
| US-3,979,700 |
Video processor A video signal processor for repetitive line data, such as the typical TV horizontal scan line. An acoustic surface wave delay line comprising a piezoelectric... |
| US-3,979,699 |
Directional coupler cascading for signal enhancement A directional coupler arrangement is provided in which a plurality of directional couplers are cascaded by connecting the thru terminal of each coupler to the... |
| US-3,979,698 |
Crystal oscillator circuit A known crystal oscillator circuit is modified to improve the starting of oscillations therein when a low supply voltage is employed. The oscillator circuit... |
| US-3,979,697 |
Frequency modulated saw oscillator An oscillator in which the "tank circuit" or feedback element is a surface acoustic wave (SAW) bandpass filter (delay line). A modulating voltage is applied from... |
| US-3,979,696 |
Laser pumping cavity with polycrystalline powder coating A coating consisting of polycrystalline Sm.sub.2 O.sub.3 powder dispersed in a Na.sub.2 SiO.sub.3 or K.sub.2 SiO.sub.3 binder may be provided on either the inner... |
| US-3,979,695 |
High order beam mode resonator High order resonant beam modes are generated in an open resonant cavity. The cavity is formed by reflectors which are separated from one another along an axis.... |
| US-3,979,694 |
Short laser pulse generation by gas breakdown switching and highly
selective spectral filtering In a laser pulse generator, short pulses adjustable in the range between about 0.1 and 0.5 nanoseconds are produced by improved spectral filtering of the output... |
| US-3,979,693 |
Crystal-controlled oscillator having sinusoidal and square-wave output
signals A precision crystal-controlled oscillator circuit with provision for separate sinusoidal and square-wave output signals which can be realized as a silicon... |
| US-3,979,692 |
Apparatus for phase keying in frequency and phase voltage controlled
oscillator with an incoming signal having... Apparatus for phase keying in frequency and phase voltage controlled oscillator with an incoming signal having a T period phase coded of the biphase PCM or PSK... |
| US-3,979,691 |
Acquisition process in a phase-locked-loop by switched phase means A phase-locked-loop circuit configuration is described which eliminates the statistical nature of the acquisition process, thereby improving or decreasing the... |
| US-3,979,690 |
Failsafe controlled gain inverting amplifier apparatus An inverting amplifier apparatus is disclosed, which provides, in a failsafe manner, a predetermined initial gain that decreases linearly over a known range of... |
| US-3,979,689 |
Differential amplifier circuit The transistors of a differential amplifier are coupled at their common emitter electrode connection to a low voltage power supply terminal and at their... |
| US-3,979,688 |
Transistor amplifier of the Darlington type with internal bias providing
low offset voltage and offset current... A transistor amplifier of the Darlington type, in which successive transistors have their collectors connected in common and in which the emitter of the first... |
| US-3,979,687 |
Line amplifier A line amplifier for transmission lines utilizing one or more transistors in combination with a Zener diode and utilizing a pnp and npn transistor interconnected... |
| US-3,979,686 |
Optical frequency modulation demodulator A laser beam frequency modulation demodulator is disclosed utilizing the highly linear frequency versus voltage characteristic of the absorption resonance... |
| US-3,979,685 |
Frequency shift key demodulator A demodulator for detecting first and second frequencies in an analog input signal includes a limiter providing first pulses having a short duration in response... |
| US-3,979,684 |
Feedback filter system A bandpass or band reject filter system is provided for operating on frequencies in an input signal with the filter system containing a feedback loop. Quadrature... |
| US-3,979,683 |
Noise eliminator circuit A noise eliminator circuit comprises a detector which detects whether or not the incoming signal exceeds a prescribed level, and an eliminator which eliminates... |
| US-3,979,682 |
Hysteresis compensator for control systems A hysteresis compensator reduces the effects of a dead zone induced error in the actuation of a controlled device in response to a control signal. A bias is... |
| US-3,979,681 |
System and method for decoding reset signals of a timepiece for
providing internal control A solid state timepiece having a chain of series connected counters with clock pulses being applied to the first counter in the chain. A reset system is... |
| US-3,979,680 |
Channel selector A channel selector comprising a tuning circuit including a variable reactance element as a tuning element and a non-volatile memory for permanently memorizing... |
| US-3,979,679 |
FM demodulator having squelch circuit using bucket brigade delay line An improved squelch circuit for FM demodulators including a low pass filter for filtering out-of-band noise from the demodulator output signals, a delay line for... |
| US-3,979,678 |
Pulse radar apparatus Pulse radar apparatus comprising at least an error voltage generator, a dither-tuned magnetron, a frequency control circuit, a conditional circuit and an angular... |
| US-3,979,677 |
System for automatic equalization Equalizing system arranged for pulse transmission, adaptive equalization being achieved without the use of an additional periodic adjusting pulse pattern. For... |
| US-3,979,676 |
Delta modulation apparatus Disclosed is a digital modem using continuously variable sloped delta modulation and adapted for digitizing voice signals in a telephone system. In the analog to... |
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