Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
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| Number | Title | Issue Date |
| 7429915 | System and method for detecting unauthorized access to electronic equipment or components An improved system and method for protecting sensitive electronic equipment or components against unauthorized access, by detecting and also reacting to unauthorized intrusions into the enclosures for the sensitive electronic equipment or components is disclosed. Fo... | 09/30/2008 |
| 7358845 | Cable limiter and crab limiter employing replaceable fusible element A cable limiter includes a main body having a cavity. The cavity of the main body is structured to receive a replaceable fusible element. An annunciator is housed by the main body. The annunciator is structured to annunciate status of the replaceable fusible element... | 04/15/2008 |
| 7312427 | High-frequency dielectric heating device and printed board with thermistor A high-frequency dielectric heating device includes: a microwave output unit including an inverter unit using a semiconductor switching element, heat-radiating fins for radiating the heat generated by an IGBT, and a printed board having a thermistor for detecting th... | 12/25/2007 |
| 7265953 | Power supply boost control device and method for identifying and judging fault location in power supply boost control device A power supply boost control device and a fault location identification and judgment method for the power supply boost control device of this invention comprise a step of judging whether a power supply relay has a turn-on fault, a precharge circuit has a turn-on fau... | 09/04/2007 |
| 7253740 | Method and apparatus for monitoring for failure temperatures of a structure An apparatus for monitoring a temperature of a structure, comprising: one or more electrically conductive loops adapted to be affixed to the structure, each including first and second elongate connection strips each made of a first metal composition having a first m... | 08/07/2007 |
| 7253639 | Insulation resistance deterioration detection method and insulation resistance deterioration detection device for motor, and motor driver The drive of the motor is stopped, the electromagnetic switch contacts are switched OFF, and thereafter the first and second contact points are closed to form a closed circuit of the smoothing capacitor, second contact point, first and second resistors, motor coil, ... | 08/07/2007 |
| 7250870 | Back draft alarm assembly for combustion heating device A back drafting alarm assembly is designed to detect back drafting in combustion fired appliances. The assembly includes a temperature sensor unit that is attached to the diverter bonnet of a water heater or furnace to measure the temperature at all times. The senso... | 07/31/2007 |
| 7138912 | Movable barrier operations method and apparatus Movement of a movable barrier (10) such as, for example, a vertically-dropping fire door, can be controlled in an informed manner and with greater flexibility regarding the manner of movement via, in one embodiment, use of a motor (20) as a generator t... | 11/21/2006 |
| 7121739 | Fiber optic cable with connector A fiber optic cable is provided with connectors at terminal ends thereof. The connectors are configured to join TOSLINK compatible components together so that the cable can transmit an optical signal therebetween. A fiber of fused silica glass is provided with a pla... | 10/17/2006 |
| 7122150 | Electronic reader for sterilization monitors A system for determining the efficacy of a sterilization process and communicating that determination to a remote device. The system includes a sterilization sensor and a reader adapted to receive that sterilization sensor. The sterilization sensor has an indicator ... | 10/17/2006 |
| 7113101 | Blister package with electronic content monitoring system A replicate can be secured to a blister package intended to contain articles, such as pills, and is used to record the removal of individual articles from the blisters. To remove an article from a blister one will usually press against the blister to push the articl... | 09/26/2006 |
| 7109873 | Fiber optic cable sensor for movable objects There is provided an apparatus that determines the location of an impermissible tamper on an object, such as an impermissible attempt to gain access to a manhole system or an attempt to steal a work of art, includes a housing disposed adjacently to the object. A fib... | 09/19/2006 |
| 7050017 | RFID tire belt antenna system and method The invention relates to a RFID chip that is contained inside a rubber tire to provide wireless communication of information concerning the tire. For instance, it may be desirable to communicate pressure and temperature information concerning a tire during its manuf... | 05/23/2006 |
| 7049970 | Tamper sensing method and apparatus A tamper sensing circuit is provided for an electrical device wherein an enclosure may be opened to access data by a user that does not possess the ability to achieve normal access by satisfying data security measures such as use of a password. A screw used to secur... | 05/23/2006 |
| 7046155 | Fault detection system A fault detection system detecting malfunctions or deteriorations, which may result in an inverter fault, is provided. The system has a temperature sensor installed on a semiconductor module to monitor a temperature rise rate. It is judged that an abnormal condition... | 05/16/2006 |
| 7023172 | Motor controller An electric motor control apparatus of this invention estimates changes in temperature of a semiconductor device to compute temperature change amplitude 108 based on an output current signal 105 computed from a current flowing through the semiconductor... | 04/04/2006 |
| 7015802 | Vehicle tag reader A remote communication device, such as a radio frequency type device, that receives temperature indicia concerning a container and/or its contents and communicates such temperature indicia along with an identification indicia to a reader. The remote communication de... | 03/21/2006 |
| 6965311 | Medical alert mat with remoter pager The medical alert mat and the accompanying pager unit is a device utilized primarily for those providing primary care for patients or loved one requiring continual supervision and assistance who are bedridden or medicated to the point where the patient or loved one ... | 11/15/2005 |
| 6880440 | Miter saw with improved safety system A miter saw having a base and an arm that pivots toward the base is disclosed. A blade is supported by the arm, and is designed to cut workpieces resting on the base when the arm and blade pivot downward. The saw includes a detection system configured to detect one ... | 04/19/2005 |
| 6813983 | Power saw with improved safety system A miter saw having a base and an arm that pivots toward the base is disclosed. A blade is supported by the arm, and is designed to cut workpieces resting on the base when the arm and blade pivot downward. The saw includes a detection system configured to detect one ... | 11/09/2004 |
| 6801140 | System and method for smart clothing and wearable electronic devices System and method for wearable electronic devices and smart clothing that includes integrating an electronic circuit into one or more fastening devices on an article of clothing. One or more electronic devices integrated with or attached to the clothing are controll... | 10/05/2004 |
| 6759964 | Fault detection system A fault detection system detecting malfunctions or deteriorations, which may result in an inverter fault, is provided. The system has a temperature sensor installed on a semiconductor module to monitor a temperature rise rate. It is judged that an abnormal condition... | 07/06/2004 |
| 6724313 | Fault detection system A fault detection system detecting malfunctions or deteriorations, which may result in an inverter fault, is provided. The system has a temperature sensor installed on a semiconductor module to monitor a temperature rise rate. It is judged that an abnormal condition... | 04/20/2004 |
| 6693549 | Sensor arrangement A sensor system is for detecting forces which, particularly in the case of a motor vehicle, lead to a deformation of components, e.g. body parts as the result of an accident. The sensor system includes a number of contact elements which are arranged on th... | 02/17/2004 |
| 6491110 | Thermal ampoule for sprinkler An electrical thermal glass ampoule for fire fighting sprinkler is disclosed. The ampoule(200) according to the present invention comprises a closed hollow cylindrical glass casing(100), an electrically heating coil(120) installed inside of said glass cas... | 12/10/2002 |
| 6384731 | System for detecting a fire event A fire event detection system includes a programmable logic circuit which evaluates electrical resistance input data and energizes an alarm upon programmed conditions. The system includes a temperature sensitive polymeric tape spanning between a pair of c... | 05/07/2002 |
| 6075445 | High-temperature warning unit A high-temperature warning indicator is provided for attachment to a firefighter's helmet. In a preferred embodiment of the invention, the indicator is in the form of a dual-color LED mounted in the tip of a highly insulated, lightweight housing. A microp... | 06/13/2000 |
| 6032663 | Stove emergency cutoff system A stove emergency cutoff system (16) comprising a stove (18) having a front wall (20), a rear wall (22), a top wall (24), laterally spaced side walls (26), a plurality of burners (28) in the top wall (24) and a plurality of control knobs (30) for the burn... | 03/07/2000 |
| 5910766 | Vehicular accident locator and identification system A vehicular accident locator system is provided including a plurality of sensor assemblies each including a brittle conductive element. The sensor assemblies are mounted throughout the body and the elements thereof are connected in series via insulated wi... | 06/08/1999 |
| 5847643 | Apparatus for indicating motor vehicle impact A honk strip comprising an electrical power source, electrical leads, electrically conducting members and an alarm. The honkstrip being useful for detecting vehicular impact with other objects and signaling a vehicle operator that an impact has occurred.... | 12/08/1998 |
| 5745039 | Remote sterilization monitor A remote sterilization indicator is described. The indicator allows a sterilization cycle to be monitored without the need to visually inspect the indicator.... | 04/28/1998 |
| 5739755 | Sensor for monitoring the cooling liquid of heat exchanger circuits A sensor for monitoring a cooling liquid circulating in a circuit of a heat exchanger of an automobile, for example, includes a support for mounting the sensor on a pipe of the circuit so that the liquid is in contact with at least a part of the sensor, a... | 04/14/1998 |
| 5661453 | Wire harness assembly fixture retainer holder and detector An apparatus for ensuring the proper existence and location of wire harness retainers along the length of a wire harness is provided. The apparatus is adapted to receive a wire harness retainer and, once the retainer is inserted, to generate a signal indi... | 08/26/1997 |
| 5450065 | Early warning heat sensor system A heat-sensitive alarm trigger is used to set off a fire alarm system. The alarm circuit is triggered either when a resistance across two sensor leads, between which the alarm trigger is connected, falls below the rated trigger resistance or when an emf o... | 09/12/1995 |
| 5384562 | Early warning heat sensor system A heat-sensitive alarm trigger is used to set off a fire alarm system having an alarm circuit with a rated trigger resistance. The alarm circuit is triggered when a resistance across two sensor leads, between which the alarm trigger is connected, falls be... | 01/24/1995 |
| 5274353 | Anti-theft device Anti-theft device comprising a flexible and deformable elongated assembly (1) which is capable of forming a loop and is provided at one end with a male closure member (2, 64) and at the other end with a female closure member (3, 2) adapted to receive and ... | 12/28/1993 |
| 5235323 | Fire alarm with electric and non-electric annunciators A fire alarm which consists of a housing, an alarm assembly and a switch assembly. A driving spring in the alarm assembly is used for storing driving energy. As soon as a nylon string in the alarm is burnt and broken, the driving spring will drive small h... | 08/10/1993 |
| 5123490 | Self-contained smoke activated fire extinguishing flooding system A self contained smoke actuated fire extinguishing flooding system is comprised of: a dual battery powered source, a smoke detecting device, a spring load plunger actuated valve, audio alarm, and a built-in test system which utilizes a blended halogenated... | 06/23/1992 |
| 5032823 | Secure personnel monitoring system A personnel monitoring system includes a tag worn by each monitored person. The tag repeatedly emits digital radio signals, and a predetermined bit in the signal changes with time according to a predetermined pattern. Monitoring apparatus detects the radi... | 07/16/1991 |
| 4999615 | Device for detecting the exceeding of a temperature threshold Device for detecting the exceeding of a temperature threshold incorporating a first mobile part (5) in a sealed chamber (4) containing a material melting at the temperature of the threshold and a second mobile part (8) outside the chamber. In the armed po... | 03/12/1991 |
