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| Patent # | Description |
|---|---|
| US-4,004,243 |
Amplifier with current gain inversely proportional to transistor h.sub.fe A first transistor of a first conductivity type connected as a common-base amplifier in the collector-to-base feedback connection of a second transistor of a... |
| US-4,004,242 |
Apparatus for supplying symmetrically limited bidirectional signal
currents An input signal current is superimposed on a direct current. The resultant unidirectional composite signal is symmetrically peak-limited or clipped. Thereafter,... |
| US-4,004,241 |
Hybrid feedback amplifier of a push-pull type A feedback amplifier including a first and a second amplifier section comprises an autotransformer winding connected between common terminals of the respective... |
| US-4,004,240 |
Phase-splitter circuits Phase-splitter circuits making use of the properties of "long-tailed pair" configurations. Each such pair comprises first and second transistors connected to one... |
| US-4,004,239 |
Discrimination circuit for isolating disturbance signals which are
superimposed on D.C. pedestals A discrimination circuit arrangement operable to discriminate between signals in the form of d.c. pedestals and superimposed thereon disturbance signals in the... |
| US-4,004,238 |
Method and apparatus for the removal of ringing phenomena from signal
impulses A method is contemplated for removing ringing phenomena from a signal impulse which comprises storing amounts of energy or voltage corresponding to amplitude... |
| US-4,004,237 |
System for communication and navigation A radio navigation and digital communication system is used for the transmission of navigation modulation and digital data. A modulation locked loop, which may... |
| US-4,004,236 |
Programmable bandpass digital filter of analog signal A novel circuit combination comprised of small scale integrated (SSI) and medium scale integrated (MSI) integrated circuits (IC) for the filtering and passing of... |
| US-4,004,235 |
Phase-locking midpulse detector Apparatus, in a receiver, for detecting the mid-pulse phase reversal of an nput signal s(t) = a(t).sub.BLT cos (.omega..sub.c t + .theta.). The signal ... |
| US-4,004,234 |
Article presence sensor Apparatus for sensing the presence of an article. One end of a very high impedance resistor is held at a fixed voltage. The other end of the resistor is... |
| US-4,004,233 |
Search type tuning device A search type tuning device wherein the output signal representing the difference frequency between the output frequency from a voltage-controlled frequency... |
| US-4,004,232 |
Radio receiver tuning control system A radio receiver tuning control system automatically selects a desired station through digital operation. A counting value based on the local oscillating... |
| US-4,004,231 |
AFC circuit A circuit arrangement for automatic fine tuning of a broadcast receiver to an assigned transmission frequency. The receiver has an input stage which can be tuned... |
| US-4,004,230 |
Critical parameter receiver tester A modulated signal is injected into receiver under test. The output of the eceiver is fed directly to a first power measuring device and through a digital filter... |
| US-4,004,229 |
Ear attachable miniaturized radio receiver A radio receiver and a battery are housed in a button adapted to fit in the ear cavity. The button is attached to the ear by a hook. The radio receiver has an... |
| US-4,004,228 |
Portable transmitter A portable transmitter intended to be used to broadcast a signal in response to an external actuation can be constructed so as to include a board such as a... |
| US-4,004,227 |
Radio frequency interference (RFI) testing by the dual screen room
technique The RFI generated by a piece of electrical or electronic equipment is meaed by placing the equipment within a screened test room. A pick-up antenna within the... |
| US-4,004,226 |
QAM receiver having automatic adaptive equalizer In a high speed QAM data communications receiver of the type adapted to receive bursts of signals having a bandwidth B Hz and sent at a predetermined rate of 1/T... |
| US-4,004,225 |
Method for synchronizing the pulse frames in time multiplex data
transmission via communication satellites A data transmission system for the transmission of time multiplex data between a plurality of stations via the transponder of a communications satellite wherein... |
| US-4,004,224 |
Method for fade correction of communication transmission over
directional radio paths A method for communication transmission in common channel operation of a directional radio network, in particular a PCM directional network, in which operation... |
| US-4,004,223 |
Audible resistance or voltage tester A resistance or voltage tester for producing an audible tone that varies inversely with resistance or voltage. The device comprises an audible wide range... |
| US-4,004,222 |
Test system for semiconductor memory cell This invention accelerates the leakage current from certain nodes of memory cells in static semiconductor memory to an extent whereby defective memory cells,... |
| US-4,004,221 |
Test device and method of checking circuitry An electrical test device and method for use in checking current carrying circuitry by an AC current measuring hook-on meter having a magnetic core for magnetic... |
| US-4,004,220 |
Electronic voltmeter This electronic voltmeter is particularly suited to develop volume unit output readings for appliance type electronic equipment. Seven operational amplifiers are... |
| US-4,004,219 |
Method for measuring the conditions inside a metal covered furnace
during its operation An arrangement for measuring conditions within a cement kiln in which the metallic body of the kiln is used as a wave guide for radio waves used for the... |
| US-4,004,218 |
Device for displaying analog signals on a raster scanning display Television or other raster display system for displaying the waveform of a time-varying input signal. The scanlines of the raster scan-line pattern are traced on... |
| US-4,004,217 |
Flux locked loop A flux locked loop, employing a squid in connection with the production of the locked-loop error signal, includes circuitry which renders the locked loop more... |
| US-4,004,216 |
Apparatus for detecting metallic particles in a flow of dielectric medium An apparatus for detecting the presence of metallic particles in a flow of dielectric material is based upon the principle of measuring the frequency shift of an... |
| US-4,004,215 |
Alternating current voltage regulator including saturable inductor and
means to block the current flow therethrough The invention relates to a voltage regulator for alternating current using a saturable core inductor as a control element for the voltage at the output of the... |
| US-4,004,214 |
Phase-controlled voltage regulator An r.m.s. voltage regulating circuit for maintaining substantially constant the r.m.s. output voltage of an A.C. source. The circuit preferably includes a triac... |
| US-4,004,213 |
Spark gap detector An apparatus for measuring the spark gap between the electrodes of the spark plug for automobile internal-combustion engines, comprising a probe adapted to... |
| US-4,004,212 |
Mine detector system A mine detector system that utilizes an explosive comparator to increase sensitivity and selectivity. The system utilizes a generator to transmit a signal... |
| US-4,004,211 |
Compound AC generator In a compound AC generator having at least one pair of magnetic poles, series field windings wound on the magnetic poles, respectively, and at least one shunt... |
| US-4,004,210 |
Reversible thermoelectric converter with power conversion of energy
fluctuations A thermal converter for transmitting electric energy fluctuations of small circuits at a higher temperature across a thermal barrier to small circuits at a lower... |
| US-4,004,209 |
Wide range power conversion system A wide range power conversion system which produces a highly regulated output over a wide range of variations in input AC source frequency and magnitude. A... |
| US-4,004,208 |
Starting aid and reserve light for vehicles A starting aid and reserve light for vehicles, especially cars. The starting aid comprises at least two identical secondary batteries normally connected in... |
| US-4,004,207 |
Rotary switch A multiple contact rotary switch comprises a rotatable staff to which an armature is electrically and physically mounted. A plurality of pins is spaced... |
| US-4,004,206 |
Servoed indicating apparatus A torque motor incorporating a permanent magnet rotor and winding therewith for providing the indicating mechanism of a servoed indicating unit. The circuitry... |
| US-4,004,205 |
Hybrid servo control system A hybrid servo control system for controlling, for example a rotation of a capstan driving motor or a head motor of a video tape recorder comprises at least an... |
| US-4,004,204 |
Method for regulating the material supply to a processing machine having
an electric drive motor A method for regulating the material feed to a processing machine, particularly a comminuting machine wherein the actual value of the temperature of the motor... |
| US-4,004,203 |
Drive systems using a. c. motors A drive system comprises a brushless multi-phase motor which is supplied with power by way of an inverter including thyristors which are fired by a firing... |
| US-4,004,202 |
Brushless D.C. motor A motor comprising a permanent magnet rotor, a plurality of stationary stator windings around the rotor, and an electromagnetic commutator for sequentially... |
| US-4,004,201 |
Multi-function solid state trip unit with trip indicating means A multi-function solid state trip unit for automatic electric circuit breakers incorporates indicators functioning to signal which of the functions, e.g., short... |
| US-4,004,200 |
Chip capacitor with spring-like leads A lead attachment for a ceramic chip capacitor characterized by a metallic strip lead having at one end two pre-formed L-shaped tabs, perpendicular relative to... |
| US-4,004,199 |
Electrical component seal A three membered capacitor sealing structure is disclosed including a lower vinyl thermoplastic layer, a layer of natural or synthetic rubber, and an upper layer... |
| US-4,004,198 |
Primary control system for furnaces and method of making the same An electrical primary control system for furnaces and method of making the same, the system comprising burner control means, an isolated low voltage control... |
| US-4,004,197 |
Panelboard and circuit breaker combination A panelboard and circuit breaker combination characterized by a pair of load bus bars with a neutral bus bar therebetween, at least one circuit breaker having a... |
| US-4,004,196 |
Multi-layer panel board with single-in-line package for high speed
switching logic A multi-layer panel employing a resistor-terminator module in the form of a single-in-line package located adjacent conventional dual-in-line packages, with... |
| US-4,004,195 |
Heat-sink assembly for high-power stud-mounted semiconductor device A heat-sink assembly adapted for use with a high-power stud-mounted semiconductor device comprises a heat-dispersing arm having one end securely attached to a... |
| US-4,004,194 |
Module for supporting circuit boards A plug-in module for supporting therein plug-in circuit boards incorporating electrical components, the module having on the inner surface of its side walls... |
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