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7551412 |
Wiring fault correction circuit
A wiring fault correction circuit for determining wiring conditions of an AC supply system includes: input line and neutral conductors connectable to the AC supply system; output line and neutral...
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7534104 |
Adapter for light emitting apparatus used in the medical field
An adapter for a handpiece system , especially for use in conjunction with medical and dental light emitting apparatus for the transmission of light to cure photo-polymerisable materials. A device,...
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7312653 |
NMOS reverse battery protection
A reverse polarity protected system comprises a voltage source that includes positive and negative terminals. A polarity-sensitive device has a first terminal that communicates with the positive...
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7199722 |
Two wire alarm
An alarm device that connects to a circuit using two wires and is actuated when a switch changes the status of the circuit from a normally closed circuit condition to open circuit condition. The...
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7180135 |
Double gate (DG) SOI ratioed logic with intrinsically on symmetric DG-MOSFET load
Disclosed is a Silicon-On-Insulator (SOI) Metal-Oxide Semiconductor Field-Effect Transistor (MOSFET) logic family composed of ratioed logic with intrinsically “on” symmetric fully depleted...
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7130179 |
Switching device provided with polarity-inverting means
The invention relates to a switching device comprising programmable compensation means which are associated with the input/output connections for inverting the polarity of the input/output...
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7110239 |
Polarity correction circuit and system incorporating the same
A polarity correction circuit including a polarity controller and an inversion circuit. The polarity controller is configured to detect an incorrect polarity in a polarity sensitive signal and...
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7106567 |
Hard disk drive (HDD) electrical over voltage stress (EOS) systems and methods
The present invention relates to a hard disk drive system having overvoltage protection circuits for various types of overvoltage conditions. For example, the system includes one or more hard disk...
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6582103 |
Lighting apparatus
An illumination apparatus provides an output with high spatial uniformity of luminance. The illumination apparatus includes a cavity that has reflective surfaces and an output area. At least one...
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6493205 |
Process for polarizing a ferroelectric material in the shape of a cylinder
Process for polarizing at least a part of a ferroelectric material in a cylindrical shape having a longitudinal axis, and having an internal conductor inside the cylinder disposed along the...
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6429550 |
Polarity reversal protection circuit for a final electronic power stage
A polarity reversal protective circuit for an electronic power output stage that can be driven via a drive circuit is described. In the case of an incorrect polarization of a supply voltage, power...
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6166451 |
Distributed airbag firing system and interface circuit therefor
A distributed airbag firing system (10) includes a controller (12) receiving sensor signals from a sensor (20) over a two-wire bus (18). The controller provides a firing command over to the...
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6064125 |
Uninterruptible power supply unit
An uninterruptible power supply unit for coupling between an adapter with an adapter connector and an electronic device in accordance with one embodiment of the present invention includes a...
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5815388 |
Polarity reversing circuit having energy compensation
A polarity reversing circuit having energy compensation may comprise a first inductor connected between the first electrode and a negative terminal of a power supply. The positive terminal of the...
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5682067 |
Circuit for reversing polarity on electrodes
A circuit for reversing a voltage polarity on a first electrode and a second electrode may comprise a first inductor connected between the first electrode and a negative terminal of an external...
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5539610 |
Floating drive technique for reverse battery protection
A MOSFET is used to protect a battery driven load against the effects of a reverse-connected battery. This invention is particularly suitable for use with loads, such as those commonly found in...
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5253138 |
Simplified supplying system of the position identification potentiometers of electronic memory mechanisms of a motor for setting automobile vehicle seats and the like
A setting in position identification potentiometer is connected to terminals of the motor. The motor is supplied with a voltage (U feed ) possibly variable and switchable between two reverse...
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5206540 |
Transformer isolated drive circuit
A transformer isolated circuit for driving a semiconductor power switch includes a transformer which is driven with a high frequency Pulse Width Modulated (PWM) signal in such a way that the...
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5191507 |
Polarity inverting circuit
A polarity inverting circuit includes first and second output voltage transmission circuits, first and second connection circuits, first and second polarity switching time changing circuits, and a...
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5187720 |
Synchronous serial communication circuit
The synchronous serial communication circuit transmits and receives data, which is added flag patterns for recognizing the coil winding direction at the first and last of data block, by the...
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5126914 |
Current inverter for an incandescent lamp in a car radio
A lamp power control circuit for electric equipment which has a power supply, supplies power to incandescent lamps fitted to operating parts of electric equipment and is provided with a...
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5099385 |
Protected reversing contractor using a multifunctional transmission systrem for controlling acknowledgement switches
A protected reversing contactor is disclosed comprising two electromagnets intended to be alternately energized and whose armatures actuate two sets of respective phase switches and two...
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4947285 |
Reversing circuit for direction reversal in direct current drives
For the purpose of achieving an efficient and long-lived switching contact making on the basis of a structural design saving space and material, a reversing circuit for direction reversal in the...
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4906861 |
Superconducting current reversing switch
A superconducting switching device having no moving components for reversing current flow through a load. This load typically is a superconducting magnet and, in this application, the present...
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4803587 |
Arrangement for change-over contact apparatus protection with interlocking member and module
A changeover contact-making apparatus with interlocking member and module of protection protected against overcurrents is provided. In a same case, two contact-making systems and coil switches are...
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4792702 |
Switch for iontophoresing cation and anion
Disclosed is a novel switch for iontophoresing cation and anion, comprising an on/off switch for power circuit; a selector switch for reversing the output current from an iontophoretic...
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4737897 |
Regulated high voltage dc-dc converter with remotely switched output polarity control
A power supply having a dual-polarity, automatically switchable high voltage output. The power supply includes apparatus for regulating low voltage including a comparator having a programming...
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4647834 |
Battery charger
This invention relates to a battery charger which includes a timer which becomes energized upon a battery approaching a fully charged condition and the timer then commences a preset timed...
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4576262 |
Method and apparatus for operating a magnetic clutch
The method and apparatus are used for operating a magnetic clutch system of the type which includes a magnetic clutch having a clutch magnetizing coil which can be actuated to couple a first...
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4224538 |
Series supervision/parallel actuation device
An electronic switch for use in alarm circuits in which line polarity is reversed in the actuation mode such that the electrical continuity of the circuit and the loads in the circuit may be...
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4204243 |
Polarity indicating and reversing unit
A polarity indicating and reversing unit for connecting a power supply line to a load line, the unit having a polarity indicating lamp for indicating a reverse polarity condition at the load and...
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4144483 |
Electrical polarity switch for battery
A switch including an input terminal which is electrically connected in use to one pole of an electric storage battery, an output terminal and a movable contact movable between an inoperative...
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4071879 |
Reversible current apparatus
Apparatus for producing a reversible local battery current to provide metering pulses on a two-wire telephone trunk circuit. A DC current supply produces a current of one polarity which is...
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3957333 |
Universal control system interface
Disclosed is an interfacing connector to allow use of a control system with an external signal source which can be either a switched "hot" or a switched ground. Both such signal sources are found...
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3849607 |
POLARITY REVERSAL SWITCHING CIRCUIT
In a telephone type system wherein battery reversal signaling is employed, a polarity reversal switching circuit utilizing alternately enabled switch arrangements is connected between an electronic...
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3823271 |
POLARITY REVERSAL CIRCUIT
In a telephone type system wherein battery reversal signalling is employed, a polarity reversal circuit utilizing an emitter follower bistable is connected between an electronic exchange circuit...
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3543134 |
BI-DIRECTIONAL DIRECT CURRENT LOAD SUPPLY
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3351934 |
Supervised alarm system
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3247445 |
Polarity reversible rectifying circuit
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2964620 |
Supply polarity control for radio receiver
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2821639 |
Transistor switching circuits
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3558998 |
Title is not available
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