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| Patent # | Description |
|---|---|
| US-3,979,675 |
Circuit interrupter A circuit interrupter for a power control system which is characterized by a circuit breaker and an electrically insulating housing, which housing comprises... |
| US-3,979,674 |
Radiating telecommunication systems A telecommunication system used in a mine has a long aerial along a tunnel which radiates signals to a mobile station. Signals from the station are radiated back... |
| US-3,979,673 |
Radiating telecommunication systems switching A telecommunication system uses a long main transmission line which extends from a base station and has repeaters along its length. A parallel line is divided... |
| US-3,979,672 |
Transistor testing circuit An automated test set for determining the reverse biased second breakdown characteristics of a bipolar transistor without destroying or degrading the transistor... |
| US-3,979,671 |
Test fixture for use in a high speed electronic semiconductor chip test
system The invention relates to apparatus for the testing of high circuit density devices fabricated by large scale integration techniques. More specifically, the... |
| US-3,979,670 |
Apparatus for detecting and measuring peak-to-peak values in electrical
signals Apparatus is disclosed for detecting and measuring peak-to-peak values in an electrical input signal, the signal comprising at least one positive-going and one... |
| US-3,979,669 |
Particle analyzing system A particle analyzing system of the type having an aperture retaining member for obtaining signals from microscopic particles suspended in a fluid which passes... |
| US-3,979,668 |
Device for testing any leakage of vacuum-tight glass seals A device for testing leakage of vacuum-tight glass seals by means of high voltage electrodes arranged on either side of the glass seal. At least one of the... |
| US-3,979,667 |
Electrical indicators A domestic soil-moisture indicator of the kind including a probe comprising a pair of electrodes with spaced ends for insertion in the soil whereby the... |
| US-3,979,666 |
Method and apparatus for evaluating properties of carbon fibers using
capacitance sensing A method and apparatus are provided for nondestructively evaluating physical properties of materials, and particularly semiconductive or electrically conductive... |
| US-3,979,665 |
Conductivity monitoring system A conductivity monitoring system including a temperature sensing means for sensing the temperature of a fluid and also providing a temperature compensated... |
| US-3,979,664 |
Capacitor discharge ignition testing apparatus employing visual spark
gap indicator Capacitor discharge ignition analyzer includes a pulse source operable to generate electrical signals related to the input-output signals of various capacitor... |
| US-3,979,663 |
Constant current source A constant current source comprises first and second complementary transistors with their emitter being connected to different poles of a direct voltage source... |
| US-3,979,662 |
Paralleling of inverters for low harmonics Two switching-type three-phase inverters are connected to supply electrical power to a common load in such a way that the load voltage has lower harmonic content... |
| US-3,979,661 |
Power supply apparatus having an output voltage within a limited range
regardless of input voltage variations... A power supply apparatus having minimal power dissipation for supplying a substantially constant voltage regardless of the variation of an input voltage. A... |
| US-3,979,660 |
Start-up circuit for static inverter Protection circuit for preventing high surge current on start up of static inverter. |
| US-3,979,659 |
Automotive alternator rectifier bridges An automotive alternator rectifier bridge comprising a pair of generally flat heat-conducting laminated bases each having a central layer of aluminum with layers... |
| US-3,979,658 |
Automatic electric battery charging apparatus An automatic battery charger of taper type has means for comparing a reference signal with a control signal varying with battery voltage, and terminating the... |
| US-3,979,657 |
Battery monitor with automatic scale and recycle prevents A monitor for disabling a selected operative function of the battery powered vehicle when the battery reaches a predetermined discharge state is disclosed. The... |
| US-3,979,656 |
Battery charging circuit A battery charging circuit for effecting efficient charging of a battery by a solar energy source is provided. A voltage detecting circuit is coupled in parallel... |
| US-3,979,655 |
Control system for controlling a dynamic compressor A control system is disclosed for a cascade control of a dynamic compressor having a variable speed of rotation to maintain a constant pressure to a process. The... |
| US-3,979,654 |
Process control system using a two wire remote control system A process control system including a control station responds to the departure of a process variable from a set point to provide a direct current signal in a... |
| US-3,979,653 |
Velocity-change control system and method for numerical control machines A velocity-change control system and method are described for numerical control machines enabling the programming of higher speeds of operation for curved and... |
| US-3,979,652 |
Electromagnetic motor utilizing attraction and repulsion forces An electromagnetic motor which incorporates a plurality of shafts each of which carries individual rotors and is journaled within stators is provided with six... |
| US-3,979,651 |
Direct current and synchronous motor system A motor control system in which direct current is sequentially applied to portions of the motor stator windings in response to rotor position signals generated... |
| US-3,979,650 |
Energy conversion apparatus for supplying variable voltage direct
current power to an electrically propelled... A synchronous machine, operable as both a motor and a generator, is mounted on an electrically powered vehicle, such as a mine shuttle car, and includes a... |
| US-3,979,649 |
Remote searchlight control system A remote control system for controlling the azimuth and altitude of a searchlight and also a control for selecting one of two modes of operation, either spot or... |
| US-3,979,648 |
System for operating fire prevention devices The system for operating fire prevention devices comprises a plurality of fire prevention device operators successively operated directly or through another... |
| US-3,979,647 |
Inductively coupled lock An inductively coupled electronic lock system wherein the key has a clock driven variable pulse width generator with alterable pulse sequence input to an... |
| US-3,979,646 |
Surge voltage arrester A surge voltage arrester having a gas-tight housing includes a pair of electrodes arranged at a distance opposite one another and with their active surfaces... |
| US-3,979,645 |
Protective circuit for short-circuit and overload protection of a power
circuit A protective circuit for short circuit and overload protection of a power circuit, particularly integrated power circuits, in which the input of the final stage... |
| US-3,979,644 |
Overvoltage protection arrangement An improved overvoltage protection circuit interrupts a power transmission path in an open circuit mode responsive to an overrange input power potential, and is... |
| US-3,979,643 |
Logic driver circuit with output protection A resistor senses low-level drive current is a logic circuit. When the output is shorted, excessive drive current turns on a sensor transistor, which causes... |
| US-3,979,642 |
Electronic protective circuit Electronic protective circuitry for protecting an electrical circuit, such as a constant current source circuit, from damage due to an overvoltage applied to the... |
| US-3,979,641 |
Vertical deflection output circuitry for television receiver A vertical deflection output circuitry for a television receiver wherein two transistors are connected in single ended and push-pull relation, and the output... |
| US-3,979,640 |
Horizontal deflection system A self-regulating horizontal deflection system with feedback indicative of the magnitude of an unregulated voltage source and of load variations to pulse width... |
| US-3,979,639 |
Correct exposure annunciator circuit An electronic flash apparatus terminates the light flash when light received from the subject has reached a predetermined level. The light terminating means... |
| US-3,979,638 |
Plasma panel with dynamic keep-alive operation An a-c plasma display panel including apparatus for driving the keep-alive cell sustain signal circuits in a non-fixed relation with address pulses. By... |
| US-3,979,637 |
Microchannel plates and method of making same Microchannel electron-multiplying plates formed of large numbers of glass-clad glass fibers all bundled tightly together in side-by-side relationship with each... |
| US-3,979,636 |
Charged particle beam scanning device A plurality of control plates is sandwiched between a cathode and a target to control the flow of charged particles such as electrons and ions between the... |
| US-3,979,635 |
Charged particle beam scanning device A plurality of control plates are sandwiched between a cathode and a target to control the flow of charged particles such as electrons and ions between the... |
| US-3,979,634 |
Travelling-wave tube with an improved electron gun In order to reduce to a minimum the internal diameter of the focusing coils 30 of travelling-wave tubes, the electrodes of the electron gun 10 thereof terminate... |
| US-3,979,633 |
Directional getter attached to multi-apertured member An improvement for inhibiting arcing within a cathode ray tube comprises a combination including a low resistive electrical coating disposed interiorly on the... |
| US-3,979,632 |
Cathode ray tube having surface charge inhibiting means therein Means for deterring the build-up of a deleterious negative charge on the neck portion of a cathode ray tube is provided for utilization in especially those tubes... |
| US-3,979,631 |
Cathode ray tube with electrostatic multipole focusing lens A cathode ray tube wherein conductive supporting members of a focusing electrode, in combination with the conductive coating around the envelope, constitute an... |
| US-3,979,630 |
Shadow mask color picture tube having non-reflective material between
elongated phosphor areas and positive... In one embodiment, a standard dot-type shadow mask color picture tube is modified by (1) increasing the glass transmission of the faceplate, and/or the mask... |
| US-3,979,629 |
Semiconductor with surface insulator having immobile charges A semiconductor structure having a surface insulating layer formed as a grid with charges implanted in the insulating material to prevent inversion and, hence,... |
| US-3,979,628 |
Method of manufacturing an electrode provided with connection A method of manufacturing an electrode provided with a connection conductor for a gas and/or vapor discharge lamp. A quantity of electrically conducting... |
| US-3,979,627 |
Electric lamp with insulating base An electric lamp having a light-transmitting envelope, such as a glass bulb, secured to a plastic base having a symmetrical wedge-lock portion. Lead-in wires... |
| US-3,979,626 |
Electrostatic focusing arrangements In electron beam discharge tubes breakdown in the form of a gaseous arc can occur. An improved form of electrode which protects an insulating support against... |
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