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| Patent # | Description |
|---|---|
| US-4,004,293 |
Tape player preamplifier circuit responsive to tape speed A preamplifier circuit for a tape player includes a voltage-follower transistor which is operable when turned on to establish the output bias voltage of the... |
| US-4,004,292 |
System for producing chroma signals Disclosed is a method and system for obtaining electronic chroma signals with a single scanning-type image device by optically producing a color multiplexed... |
| US-4,004,291 |
Electric signal transmitter, preferably for alarm system An electric signal transmitter preferably for alarm devices, the transmitter being connected with a manually actuatable switch which is galvanically separated... |
| US-4,004,290 |
Method and apparatus for judging psychosomatic condition of the driver
in motor vehicle A method and apparatus for judging the psychosomatic condition of the driver in a motor vehicle, wherein engine-lock means are provided to control the ignition... |
| US-4,004,289 |
Acoustic grain flow rate monitor A grain flow rate monitor has a high sensitivity for the detection of seed loss in the chaff ejected from a thresher, which may be used for monitoring heavy or... |
| US-4,004,288 |
Battery operated fire detection unit A battery operated fire detection unit that is capable of independent monitoring through sensing of smoke with the unit maintaining monitoring capabilities over... |
| US-4,004,287 |
Hollow magnetic domain recording device A recording device in which hollow magnetic domains are produced in plates of, for example, orthoferrite by means of a magnetic field. The region within which... |
| US-4,004,286 |
Programmable random access memory (PRAM) integrated circuit memory device A novel integrated circuit memory cell structure where the individual cells in the storage matrix may be utilized as either a RAM type storage cell or a ROM type... |
| US-4,004,285 |
Read-write circuitry for one transistor per bit random access memory A random access memory includes a plurality of one-transistor storage cells. A plurality of sense-write conductors are included, each connected to a plurality of... |
| US-4,004,284 |
Binary voltage-differential sensing circuits, and sense/refresh
amplifier circuits for random-access memories In one example, a generally conventional flip-flop circuit is used, including a pair of input field-effect transistors having their gates connected respectively... |
| US-4,004,283 |
Multiple interrupt microprocessor system A digital system comprises a plurality of metal-oxide-semiconductors (MOS) chip random access memory (RAM) and read only memory (ROM) and peripheral interface... |
| US-4,004,282 |
Circuit arrangement for an integrated data processing system composed of
a small number of different chip types... In a circuit arrangement for an integrated data processing system, which arrangement is composed of various function blocks formed on integrated circuit chips... |
| US-4,004,281 |
Microprocessor chip register bus structure A program register is coupled between a data bus N bits wide and an address bus N bits wide for storing the address of the current byte of a multi-byte... |
| US-4,004,280 |
Calculator data storage system Disclosed is an expandable calculator system of the type implemented on semiconductor chips providing additional data storage registers for increasing data... |
| US-4,004,279 |
Method and apparatus for controlling data transfer between input and
output devices and a direct digital controller A digital controller comprises digital operating and processing means including an offering signal input terminal, an answerback signal input terminal, a data... |
| US-4,004,278 |
System for switching multiple virtual spaces In a virtual memory system capable of embodying therein multiple virtual spaces used in a switching mode and having a high speed memory for storing address sets... |
| US-4,004,277 |
Switching system for non-symmetrical sharing of computer peripheral
equipment Switching apparatus and methods are disclosed by which one or more secondary computers of a loosely-coupled multiprocessing system may communicate directly with... |
| US-4,004,276 |
Telephone answering machines A remotely controllable electrical equipment is fitted with a decoder device associated with which is an unlocking circuit. Access to the electrical equipment is... |
| US-4,004,275 |
Self-clocking data entry unit system A self-clocking data entry unit system including a plurality of data entry units connected in seris in a loop which is connected at its ends to a controller.... |
| US-4,004,274 |
Signal light assembly A signal light assembly for vehicles requiring positive visual identification for either emergency service or traffic control usage, in which an identification... |
| US-4,004,273 |
Engine speed responsive anti-theft device for vehicle An anti-theft device for an automotive vehicle in which an electronic engine speed responsive means is effective, when said anti-theft device has been prepared... |
| US-4,004,272 |
Optical pressure switch A device for providing an optical indication of the pressure condition in a pressurized member, such as a pneumatic tire. A housing having a window therein... |
| US-4,004,271 |
Low tire pressure warning system A vehicle pneumatic tire low pressure warning system including a low pressure air switch carried on the vehicle rotating wheel assembly which compares a... |
| US-4,004,270 |
Electronic tire pressure alarm circuitry An electronic alarm circuit indicates an abnormal pressure condition in a pneumatic tire on a vehicle. The circuit includes an indicator, either in the form of a... |
| US-4,004,269 |
Brake lining wear warning system A brake lining wear warning system comprising a probe which becomes nonconductive when the wear of a brake lining reaches a critical value, a holding circuit... |
| US-4,004,268 |
In-line stress/strain detector A plurality of detector units oriented in line to form a linear array to detect intrusions such as footsteps upon the ground under which the array is buried, the... |
| US-4,004,267 |
Discrete frequency seismic exploration using non uniform frequency
spectra A seismic exploration method is described in which a vibratory source transmits into the earth a series of discrete wave packets of different center frequencies,... |
| US-4,004,266 |
Transducer array having low cross-coupling An array of circular, acoustic projecting and receiving transducers is deibed, including a stainless steel baffle plate in which the transducers are mounted,... |
| US-4,004,265 |
Self-propelled array system A hydrophone array system comprising a plurality of hydrophones fastened to a cable is deployed beneath the sea in a substantially horizontal straight line. A... |
| US-4,004,264 |
Variable resistance device A variable resistance device of the type wherein a worm screw is utilized to move a contact bearing member through a path of travel relative to conductive and... |
| US-4,004,263 |
Protector module for telephone systems An improved telephone line protection device including means for grounding excessive currents and voltages. The disclosed embodiments include temperature... |
| US-4,004,262 |
Electromagnet for providing balanced friction face pressures on an
armature in a vehicle electric brake system An electromagnet for use in electric brakes and similar type clutches which will apply balanced friction face pressure against a rotating armature face despite... |
| US-4,004,261 |
Connection device A connection module has a plurality of connection devices, each including two conductors separated by an insulator having an aperture between the conductors and... |
| US-4,004,260 |
Power relay The relay has a tube as coil/core carrier with end flanges, one flange being continued in a box like enclosure containing and pivoting the armature. Contact... |
| US-4,004,259 |
Temperature responsive electric switch A thermomagnetic switch is mountable on a chamber wall to extend into a liquid filled chamber. A reed switch in the switch is controlled by the strength of a... |
| US-4,004,258 |
Position indicating pulse latching solenoid A position indicating pulse latching solenoid has a plunger of paramagnetic steel, movable between two stops of similar material, and fixed permanent magnets... |
| US-4,004,257 |
Transmission line filter A transmission line filter having two conductors with insulation therebetween. A third conductor of a length related to the wavelength of the signal being... |
| US-4,004,256 |
High frequency amplifier stage with input reference translation and
output matching High frequency amplifier stage having a transistor operating in either a common base or a common emitter mode, with the collector connected directly to a ground... |
| US-4,004,255 |
Microwave frequency phase modulator Phase modulator enabling the ratio of parasitic waves to be reduced and the precision on the phase shift to be increased, comprising two microwave frequency... |
| US-4,004,254 |
Swif with side lobe compensation barrier An acoustic surface wave filter comprises a piezoelectric substrate defining a propagating surface upon which a transmitting and receiving transducer pair are... |
| US-4,004,253 |
Variable equalizer An inductorless variable equalizer comprises input and output terminals. A first transmission network is situated in the forward path between the input and... |
| US-4,004,252 |
Safe deposit apparatus, with selective plate and shield for dual
function depository The invention provides a dual function safe deposit apparatus which may be operated either without a key to receive envelopes and deposit them in one ... |
| US-4,004,251 |
Inverter transformer A transformer designed to operate with a pair of power switching transistors in a d.c. to a.c. inverter is described. The transformer has an assembled core whose... |
| US-4,004,250 |
Laser action by optically depumping lower states A method and apparatus for obtaining laser action between an upper energy level and a lower energy level of a gaseous medium, which comprises populating the... |
| US-4,004,249 |
Optical waveguide laser pumped by guided electromagnetic wave An electromagnetic waveguide having a large cross section portion tapering to a narrow throat is supplied with microwaves in the large portion to produce a high... |
| US-4,004,248 |
Control of timing of laser operation To prevent time jitter of laser action after occurrence of an event -- such s energization of the laser -- after a reference time, in which the laser is... |
| US-4,004,247 |
Voltage-current converter A voltage-current converter having a balanced-voltage input and a balanced-current output. Each of the emitter circuits of the two input transistors includes a... |
| US-4,004,246 |
Pulse width modulated signal amplifier A pulse width modulated signal amplifier system includes a signal input circuit, an amplifier for receiving an input signal from the signal input circuit, a... |
| US-4,004,245 |
Wide common mode range differential amplifier A differential input is applied to four bridge-connected field effect transistors. The bridge drives a differential common base transistor stage. The output can... |
| US-4,004,244 |
Dynamic current supply A dynamic current supply is connected between the emitter electrode of an output transistor and a point of reference potential, to progressively increase the... |
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