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6002564 |
Overcurrent protection thick-film resistor device and overcurrent protection circuit using the same
An overcurrent protection thick-film resistor device and overcurrent protection circuit employing the same are provided. Overcurrent (e.g., surge current) flows into the overcurrent protection...
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5999391 |
Outage device and surge protection using the same
An outage device and a surge-protection that uses the outage device, wherein the outage device is formed by connecting an overcurrent protection and an overheat protection in series, and packaged...
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5995350 |
Temperature controlled circuit interrupter
A temperature sensitive circuit interrupting arrangement includes a temperature controlled relay that will open to disconnect a load, such as a common household appliance or utensil, from a power...
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5991140 |
Technique for effectively re-arranging circuitry to realize a communications service
In a communications arrangement, a copper wire pair arrangement traditionally used to provide a plain old telephone service (POTS) is also used to provide an asymmetric digital subscriber line...
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5982597 |
Shorting fusable metal oxide varistor
A fuse assembly comprising a fuse element and a fuse cavity are formed integrally with the body of a Metal Oxide Varistor (MOV). Melting of the fuse element forms fused material which flows into...
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5978196 |
Control system for thermal protection of high wattage lighting
A thermal protection system for use with a lighting fixture includes a temperature-sensitive switch responsive to the ambient temperature which may have a rating less than that of the lamp. The...
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5969927 |
Integrated overload protective device
An overload protective device for integrated components that responds rapidly to transient local temperature increases to protect the respective component from overload or overheating. The...
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5966281 |
Circuit breaker with thermal sensing unit
A circuit protection apparatus includes a circuit breaker coupled in series with a circuit to be protected. The circuit breaker has a trip input and is responsive to a trip signal at the trip input...
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5959464 |
Loss-less load current sensing driver and method therefor
A loss-less load current sensing driver and method includes providing current (603) to a load from a power supply through a transistor. A voltage drop is measured (605) across the transistor...
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5946181 |
Thermal shutdown circuit and method for sensing thermal gradients to extrapolate hot spot temperature
A circuit provides at least partial thermal shutdown of an integrated circuit chip including a functional circuit (7) in response to detection of a hot spot in a first area of the chip. First (Q1)...
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5943198 |
Electrical fault interrupt circuits
A circuit for the avoidance of electrical shock and burns in an electrical appliance. Designed primarily for a two wire appliance, the device consists of a conditioning circuit at the load and a...
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5943203 |
Electronic circuit breaker
A monolithic electronic circuit breaker having an input terminal, an output terminal, and a controllable impedance connected between the input and output terminals. A current sensor generates a...
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5943206 |
Chip temperature protection using delay lines
A temperature protection device determines the operating temperature of an integrated circuit chip. The temperature monitor includes a delay line made up of serially connected delay cells. The...
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5936819 |
Break display apparatus for semiconductor switching element incorporating overcurrent/overheating protection function
A break display apparatus for an intelligent power IC incorporating an overcurrent/overheating protection function. The break display apparatus includes a plurality of intelligent power ICs each...
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5936820 |
Overheating protection system of switching module
An overheating protection system for a switching module prevents thermal breakdown of switching devices for passing currents through a load, for example an electric motor, while making it possible...
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5933068 |
Protective apparatus for an electrical installation having temperature-sensitive disconnection means
A protective apparatus for an electrical installation, includes a device for connecting the protective apparatus to an electrical installation in parallel intermediate phase and zero and under no...
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5930097 |
Heat responsive power interrupting device cross-reference to related applications
An electric device is provided as an interface between a permanent power source (e.g., an electric wall outlet) and an electrical appliance. The device operates to interrupt electrical power to the...
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5926659 |
Bracket for mounting a thermal-based electric current cutoff device within a piece of electronic equipment
A bracket for mounting a thermal cutoff device within an electronic device having an electronic component. The bracket includes, but is not limited to, a fastener for fastening the bracket within...
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5909351 |
2-element gas tube thermal overload/backup gap
A backup gap type over-voltage protector and thermal protector for a two element gas discharge tube. The gas discharge tube is mounted with its electrodes between opposing fingers of a clip of...
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5903423 |
Battery pack for electric power tools
The battery pack for electric power tools of this invention has a circuit breaker connected in series with the batteries to protect those batteries from abnormal temperature or abnormal current by...
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5903418 |
Overcurrent protection apparatus for refrigeration and conditioning compressor systems
Motor protection for air conditioning and refrigeration compressors includes in a first embodiment a cluster block (22) having a seat for a hermetic motor protector (24, 24') and mounting a...
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5898557 |
Switching apparatus
To turn on or off semiconductor switches based on the current-duration product of a current flowing through them, the device of the present invention detects an ambient temperature of the harness...
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5896259 |
Preheating device for electronic circuits
A system for preheating electronic components on a printed wiring board or other interconnecting substrate prior to application of voltage to the components in extreme cold temperature...
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5894396 |
Inrush current protection circuit
An inrush current protection circuit for preventing generation of inrush current when an AC voltage is intermittently applied to a load, and an application of the circuit to a microwave oven. A...
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5870267 |
Semiconductor integrated circuit device with overheating protector and method of protecting semiconductor integrated circuit against overheating
A plurality of LSI circuits including image processing LSI circuits operable in synchronism with a control clock signal from a clock generator are mounted on a graphic board. Temperature sensors...
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5862030 |
Electrical safety device with conductive polymer sensor
An electrical safety device comprises a sensor strip disposed in the insulation of a wire or in the insulation of a sheath enclosing a bundle of insulated electrical conductors. The sensor strip...
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5859578 |
Current limiting shunt for current limiting circuit breakers
A compact current limiting circuit breaker is equipped with a current limiting shunt for effective over-current circuit interruption. The circuit breaker trip unit responds to long time, short time...
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5852539 |
Overheat circuit for a utility vehicle
An overheat protection circuit includes a resistor having a first lead connected to the engine temperature switch and the power take off (PTO) relay coil circuit. The second lead of the resistor is...
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5850330 |
Electronic trip device that detects an imminent drop of the power system voltage and comprises a numerical processing circuit and a thermal memory
The electronic trip device with a thermal memory including a capacitor and a charging resistor arranged in parallel. In normal operation, the capacitor is permanently charged by a supply voltage...
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5844466 |
Bimetallic thermal triggering apparatus for a protection device
Thermal triggering apparatus, for a protection device featuring an electrically conductive bimetallic strip and a plate of thickness (e) which supports the bimetallic strip. The bimetallic strip...
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5844759 |
Electrical fault interrupter
An apparatus and method for the avoidance of electrical shock in an electrical appliance. Preferred for a two wire appliance, the device consists of a current interrupting circuit that impedes...
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5834921 |
Safety device for a portable battery-powered electric apparatus
A safety device for a portable battery-powered electric apparatus having a battery unit with one or more battery cells for supplying power to electric circuitry in the apparatus. The apparatus is...
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5835786 |
Computer apparatus with monitoring circuit for displaying fan working condition
Computer apparatus 10 provides the working condition of fan 12 therein to user display device 10D. Fan 12 has rotating blade 12B for moving a flow of convective cooling air. The fan also has motor...
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5835325 |
Electronic trip device comprising a correcting device
The trip device with an electronic processing unit which gives a tripping order in terms of the rms value of the current measured by current transformers and of the threshold and time delay...
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5822164 |
Pre-engineered combination starter for multiple motor sizes
A pre-engineered single-rated combination starter is suitable for controlling any size motor ten horsepower and below in a three-phase 460 volt system. The assembled starter comprises an electronic...
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5815358 |
Circuit configuration and semiconductor body with a power switch
A circuit configuration includes first and second terminals, a power switch having a control terminal, an electronic switch connected between the control terminal and the second terminal for...
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5805403 |
Integrated circuit temperature monitoring and protection system
A system of monitoring and protecting integrated circuits against damage due to over temperature conditions functions to monitor the temperature of an IC and either shut down its input clock signal...
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5784232 |
Multiple winding sensing control and protection circuit for electric motors
The present invention involves control and protection circuit for a compressor motor which includes an inductively activated contactor for controlling the flow of current to the compressor motor....
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5761020 |
Fast switching smartfet
In a power integrated device having temperature monitoring circuits powered from input signal pulses, an overtemperature signal is memorized in a small capacitor (30 picofarads) to guarantee that...
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5760563 |
Method and apparatus for providing thermal feedback between an analog power chip and a digital controller chip in a disk controller system
A disk drive has a microprocessor, a digital controller chip, and an analog power chip, and a multi-winding spindle motor. The power chip operates under gross and fine control to connect and...
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5761018 |
Variable thermal model overload in electrical switching apparatus
A motor starter for an electrical circuit includes separable contacts for switching an electrical current flowing between a power source and a motor; an operating mechanism responsive to a trip...
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5752100 |
Driver circuit for a camera autofocus laser diode with provision for fault protection
A laser diode current drive control circuit including a drive circuit supplying a modulated laser diode current drive signal, a laser diode drive current source having a switch responsive to the...
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5737170 |
Thermal shutdown circuit using a pair of scaled transistors
The base of a thermal shutdown bipolar transistor having a V BE (on) which decreases with increasing temperature is biased with a bias voltage V PTATbias which increases proportionally with...
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5737171 |
Switched management of thermal impedence to reduce temperature excursions
Systems and methods for reducing the thermal stresses between an integrated circuit package and a printed circuit board, each having different thermal coefficients of expansion, to minimize thermal...
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5726850 |
Fail safe protection circuit for PTC comfort devices
An electrical heating apparatus comprising a controller, fail safe protection circuit and resistance heating body embedded in a comfort device. The fail safe protection circuit is constructed to...
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5724220 |
Coaxial transmission line surge arrestor with fusible link
Apparatus for protecting a coaxial transmission line using a coaxial transmission line surge arrestor and a fusible link connected thereto. The surge arrestor comprising a gas discharge tube having...
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5708553 |
Automatic switching-off structure for protecting electronic device from burning
An electronic device integrally formed with an automatic switching-off structure for protecting the device from overheating. At least one conducting lead of the electronic device is mechanically...
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5689395 |
Overcurrent protection circuit
An overcurrent protection system which will give a rapid response to relatively small overcurrents. The system, which can be connected between an electrical power supply and an electrical load to...
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5684663 |
Protection element and method for protecting a circuit
A protection element (10) protects a battery pack (36) from potential faulty conditions in a load (38). The protection element (10) includes a switch (12), a control FET (14), and three resistors...
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5671113 |
Low water protector
A protection circuit for use with a hot water dispensing apparatus of the type which includes a reservoir and a heating element coupled to the reservoir for heating water retained therein. The...
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