Searching:
Search by keyword, patent number, inventor, assignee, city or state:
| Patent # | Description |
|---|---|
| US-4,419,670 |
Dual feed box horn antenna A radar antenna includes a box horn radiator which is capable of simultaneously transmitting X band and S band signals. The S band signals are transmitted as a... |
| US-4,419,669 |
Controlled scintillation rate decoy A controlled scintillation rate decoy having microwave reflectors for reflecting incident radar energy in a manner to provide the decoy with a selected radar... |
| US-4,419,668 |
Combined tone only and tone voice multiple alert pager A combined tone only and tone and voice multiple alert pager is provided which implements separate tone only and tone and voice alert modes in response to the... |
| US-4,419,667 |
System for controlling power distribution to customer loads A method and apparatus which permits a power utility to have direct control of customers loads (CD) with a view toward facilitating enablement of a load... |
| US-4,419,666 |
System for controlling power distribution to customer loads A method and apparatus which permits a power utility to have direct control of customers loads (CD) with a view toward facilitating enablement of a load... |
| US-4,419,665 |
System for controlling power distribution to customer loads A method and apparatus which permits a power utility to have direct control of customers loads (CD) with a view toward facilitating enablement of a load... |
| US-4,419,664 |
Co-ordinate addressing of smectic display cells A co-ordinate matrix addressing system is used to address a liquid crystal display cell containing a positive dielectric anisotropy smectic material. For this... |
| US-4,419,663 |
Display device A display device comprises a composite body including a display structure of film-shape or plate-shape porous substance made of light transmissive or colored... |
| US-4,419,662 |
Character generator with latched outputs A character generator driven by a microcomputer and providing latched outputs is disclosed. Flexibility in character size and character array positioning on the... |
| US-4,419,661 |
Dual cathode-ray tube display system for text editing A cathode-ray tube display device including first and second cathode-ray tube displays. The first cathode-ray tube displays an entire screen full of characters... |
| US-4,419,660 |
Electric filter equipment An electric filter, for example an harmonic filter in an HVDC convertor, has, in addition to the main filter, a low power model filter having the same frequency... |
| US-4,419,659 |
Intrusion detection system using leaky transmission lines A sensitive intrusion detection system has an RF excited antenna located within the area to be protected and a leaky coaxial cable extending around the... |
| US-4,419,658 |
Portable combination lamp, smoke detector and power failure alarm A portable protection device is shown for use in sounding a warning in the event of smoke or power failure and to supply a portable high intensity lamp when... |
| US-4,419,657 |
Speech digitization system A speech digitization system including novel encoder and decoder circuits that minimizes the number of resolution bits required to produce a given level of... |
| US-4,419,656 |
Method and apparatus for digital converter testing A method and apparatus is described for dynamically testing the overall performance characteristics of digital-to-analog converts and analog-to digital... |
| US-4,419,655 |
Golf course play indicator devices An indicator device to inform golfers of the position of the cup on the green and other play aspects of a hole of a golf course. It has a display panel carrying... |
| US-4,419,654 |
Tractor data center A monitoring apparatus for a vehicle such as a tractor comprises a console including controls and a control circuit for calculating wheel slippage of at least... |
| US-4,419,653 |
Variable resistance switch Variable resistance switch of a continuously-variable resistance pressure-dependent measurement sensor for triggering a switching operation of an electrical... |
| US-4,419,652 |
Temperature sensor A temperature sensor (1) having a thick or thin film forming a resistance temperature sensing element (13c), a thermocouple (13a, 13b) or a resistance... |
| US-4,419,651 |
High voltage current limiting fuse having a fuse element susceptible to
oxidation and especially suited for... A high voltage fuse with an element operating at relatively high temperatures and having such element comprised of a metallic material which is highly... |
| US-4,419,650 |
Liquid contact relay incorporating gas-containing finely reticular solid
motor element for moving conductive liquid It has been discovered that electrically conducting, vitreous pyrolytic carbon in broken-bubble, foam-type, reticulated structures can be used as an extremely... |
| US-4,419,649 |
Circuit breaker for use on AC and DC circuits A circuit breaker suitable for use on both AC and DC circuits includes a magnetically permeable core surrounding a current carrying conductor of the circuit... |
| US-4,419,648 |
Current controlled variable reactor A variable reactor having main windings wound on one set of legs of a magnetic core and control windings mounted on another set of legs. The core provides common... |
| US-4,419,647 |
Liquid-cooled transformer for large power ratings Liquid-cooled transformer for large power ratings, including a tank having a bottom with cutouts formed therein, large-area base plates resting on the bottom of... |
| US-4,419,646 |
Electric proximity sensor An electric proximity switch of the type that is inserted into the cylinder wall of a hydraulic cylinder and is sealed tight with respect to the hydraulic fluid,... |
| US-4,419,645 |
Multiple position half-turn inductor A one-half turn inductor is formed in a mold having a series of spaced ribs forming grooves therebetween, a U-shaped coil has its bight portion positioned in a... |
| US-4,419,644 |
Switchable permanent magnetic holding device A permanent magnet energized holding device for holding of, or onto, ferromagnetic objects and readily switchable between "on" and "off" positions, has outer and... |
| US-4,419,643 |
Self-sustaining solenoid A self-sustaining solenoid which is adapted so that when applying an operating current to a coil, a moving iron core disposed in the coil is attracted into... |
| US-4,419,642 |
Solenoid with saturable element A solenoid includes a coil, a pole assembly, an armature movable in the pole assembly and an air gap separating the armature from part of the pole assembly. A... |
| US-4,419,641 |
Solenoid A solenoid spool having a Bowden cable connector that is made in two parts which are uniquely formed and related to the solenoid plunger to cover and protect the... |
| US-4,419,640 |
Unitary contact-terminal blades integrally formed in a molded base There is provided a method of producing a contact switching device comprising a step of pressing an electrically conductive metal sheet to form a lead frame... |
| US-4,419,639 |
Key assembly A key assembly for receiving units employed in communications engineering, articularly for television receivers, comprises a plurality of mutually releasable... |
| US-4,419,638 |
Negative resistance element A negative resistance element having two terminals (11, 12;) a resistor (R1-4) connected in a path between the terminals, and a current mirror arrangement (T1,... |
| US-4,419,637 |
Magnetostatic wave dioptric device A magnetostatic wave device in which waves propagate in a layer of magnetic material grown on a non-magnetic crystalline substrate with a grating arranged in the... |
| US-4,419,636 |
Low frequency wide band signal coupler One circuit is a low frequency, wide band multi-directional tap that exhibits good match characteristics with low through loss. The circuit has input and output... |
| US-4,419,635 |
Slotline reverse-phased hybrid ring coupler A slotline directional coupler is disclosed that introduces a 180.degree. phase reversal in one of the arms of the coupler in order to isolate opposite ports of... |
| US-4,419,634 |
Oscillator whose frequency is controllable by a current variation A controllable LC oscillator has a constant inductance and a constant capacitance. In an oscillator circuit comprising a parallel resonant circuit, voltage... |
| US-4,419,633 |
Phase lock loop A variable voltage control oscillator can have its output frequency varied over a wide range of frequencies with a high degree of accuracy at each frequency and... |
| US-4,419,632 |
Bias circuit for microwave FETs Disclosed is a circuit for biasing FETs which limits unwanted gate current. A first resistor (R.sub.8) is coupled in series with the gate and the output (14) of... |
| US-4,419,631 |
Integrated circuit amplifier functioning in class AB and incorporating
CMOS (metal oxide semiconductor) technology This invention concerns an integrated-circuit amplifier incorporating CMOS (metal oxide semiconductor) technology, which amplifiers are capable of supplying a... |
| US-4,419,630 |
Phase demodulator utilizing a frequency divider, synchronous filter, and
phase comparator A phase demodulator for recovering the modulating wave from a phase-moduld wave. A frequency divider is provided to divide the phase-modulated wave in frequency... |
| US-4,419,629 |
Automatic synchronous switch for a plurality of asynchronous oscillators A switching circuit for automatically selecting one of a plurality of normally operable asynchronous oscillators is provided with a selection switch for... |
| US-4,419,628 |
Transient-noise simulators A noise simulator including a reflection absorbing circuit connected between a high-frequency noise pulse generator based on the principle of a charged delay... |
| US-4,419,627 |
Measuring the moisture content of materials There is provided a method and apparatus for measuring the moisture content of materials, e.g., tobacco. In cases where the material flow is intermittent, the... |
| US-4,419,626 |
Broad band contactor assembly for testing integrated circuit devices A test contactor assembly for integrated circuit (IC) electronic devices and the like has at least one row of flexible contacts that are each secured at a lower... |
| US-4,419,625 |
Determining asynchronous motor couple A device determines the mean power absorbed from a current supply by measuring the current in a phase, and the voltage between two phases, determining the... |
| US-4,419,624 |
Apparatus for phase measurement An improved phase indicator measures the phase difference between a sinusoidal reference signal and a shaped signal having the same frequency. Means are provided... |
| US-4,419,623 |
Reactance meter A circuit capable of measuring the value of an unknown reactance over a wide range of values resonates the unknown reactance with a known reactance value of... |
| US-4,419,622 |
EM Sensor for determining impedance of EM field A method and device for determining the impedance of the electric and magic fields in the near and far fields associated with a radiating antenna. The electric... |
| US-4,419,621 |
Monitoring system for the capacitor batteries of a three-phase filter
circuit A system for monitoring the capacitor batteries of a three-phase filter circuit. Each capacitor battery is formed of a plurality of parallel legs each having a... |
Copyright 2008−2012 Patents.com
