Did You Know...
...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.
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| Number | Title | Issue Date |
| 7909506 | Virtual temperature measuring point The invention relates to a method for determining a temperature profile and the integral mean temperature and/or axis temperature in a thick wall or shaft. In order to determine a mean integral wall temperature during heating or cooling processes in a multilayer mod... | 03/22/2011 |
| 7258483 | Device for measuring the level and/or the temperature in a container A device for measuring at least one of a level and a temperature of a liquid in a container includes a resistor arrangement adapted to be immersed in the liquid. An immersed length of the resistor arrangement in the liquid corresponds to the level of the liquid in t... | 08/21/2007 |
| 7213968 | Hot melt adhesive detection methods and systems A hot melt adhesive sensing system and method including detecting (410) multiple areas of a target, for example, a hot adhesive material, by sensing changes in temperature with a corresponding number of thermal sensors, summing (420) an output of the t... | 05/08/2007 |
| 7150559 | Hot melt adhesive detection methods and systems A hot melt adhesive sensing system and methods including detecting (410) multiple areas of a target, for example a hot adhesive material, by sensing changes in temperature with a corresponding number of thermal sensors, summing (420) an output of the t... | 12/19/2006 |
| 7070325 | Hot melt adhesive detection methods and systems Hot melt adhesive sensing systems and methods including detecting (410) multiple areas of a target, for example, a hot adhesive material, by sensing changes in temperature with a corresponding number of thermal sensors, summing (420) an output of the t... | 07/04/2006 |
| 7004625 | System and method for temperature sensing and monitoring An approach for digitally measuring temperature in support of a monitoring application is disclosed. Multiple probes, according to one embodiment, are deployed for sensing environmental parameters (e.g., temperature, liquid level, flow). Each probe has a thermally c... | 02/28/2006 |
| 6890095 | Multiple point averaging duct temperature sensor A multipoint temperature sensor for measuring fluid temperature in a duct includes multiple thermistors of equal resistance, spaced apart in a circuit. Each thermistor has a positive lead and a negative lead for connecting electrically with the circuit. Wires connec... | 05/10/2005 |
| 6834992 | Acoustic pyrometer An acoustic pyrometer measures the average gas temperature across a wide space of known distance, especially turbulent, high temperature gas loaded with caustic particulates. It includes an acoustic signal generator that generates a high amplitude acoustic signal wi... | 12/28/2004 |
| 6726358 | Acoustic pyrometer An acoustic pyrometer measures the average gas temperature across a wide space of known distance, especially turbulent, high temperature gas loaded with caustic particulates. It includes an acoustic signal generator that generates a high amplitude acoustic signal wi... | 04/27/2004 |
| 6592254 | Multiple point averaging duct temperature sensor A multipoint temperature sensor for measuring fluid temperature in a duct includes multiple thermistors of equal resistance, spaced apart in a circuit. Each thermistor has a positive lead and a negative lead for connecting electrically with the circuit. W... | 07/15/2003 |
| 6425687 | Cold junction compensation for multiple thermocouples A system for measuring average temperature including a plurality of measurement thermocouples (10,12,14) connected in parallel to measurement apparatus (24) by two signal wires (22) of a material different to that of the measurement thermocouples (10,12,1... | 07/30/2002 |
| 6145751 | Method and apparatus for determining a thermal setpoint in a HVAC system The present invention discloses methods for determining setpoint information in a HVAC system. Setpoint values are determined using occupant feedback provided by individual occupants over at least one of an Internet or Intranet communications network. Acc... | 11/14/2000 |
| 6079874 | Temperature probes for measuring substrate temperature An apparatus accurately measures a temperature of a substrate in a thermal processing chamber. The apparatus has a support structure to support the substrate within the thermal processing chamber. A first probe is provided with an input end positioned to ... | 06/27/2000 |
| 6061413 | Nuclear steam supply temperature measurement system and method A temperature measurement system includes, for each of two nuclear steam supply system (NSSS) loops, four temperature sensors each of which provides a value of the temperature of reactor coolant flowing in the NSSS hot leg of the loop; a mechanism for det... | 05/09/2000 |
| 5850969 | Method for controlling temperature in a refrigerator when a temperature sensor operates abnormally A method for controlling the temperature of a compartment of a refrigerator, the compartment utilizing at least two spaced apart temperature sensors, such that, even when one of the sensors malfunctions, the compartment is cooled without any degradation o... | 12/22/1998 |
| 5803357 | Thermostat with remote temperature sensors and incorporating a measured temperature feature for averaging ambient temperatures at selected sensors A thermostat includes a first temperature sensor integral with the thermostat and at least one and typically three remotely positioned temperature sensors. Switches are provided to select which one or more temperature sensors are employed to provide an av... | 09/08/1998 |
| 5743645 | Tire pyrometer A tire pyrometer including a control box (12) and a tire probe (14), wherein the control box (12) includes a display panel (18) that can display up to twelve tire temperature readings at the same time. Display panel (18) can also display average temperatu... | 04/28/1998 |
| 5407129 | Poultry environmental control systems and methods A poultry house controller (14) situated within a poultry house (12) regulates the relative humidity and temperature within the poultry house (12) via actuation of fans (22) and heaters (24) in response to temperature and humidity feedback signals from te... | 04/18/1995 |
| 5226729 | Averaging temperature probe An averaging temperature probe is disclosed wherein a sensor strip extends from a mounting plate substantially across a stratified airflow. Temperatures at points spaced along the sensor strip are measured and averaged by circuitry to provide a more accur... | 07/13/1993 |
| 4969749 | Apparatus and method for measurement of average temperature change in a storage tank Apparatus for measurement of average temperature change in the liquid in a storage tank. A series connected plurality of discrete, temperature sensitive elements, at predetermined spacings in the liquid provide a direct output reading representing average... | 11/13/1990 |
| 4932243 | Moisture measurement device A method of determining the moisture content of a material in which the material is caused to flow continually through a sensor region, the spatially averaged temperature of the material being continually determined independently of the dynamic thermal re... | 06/12/1990 |
| 4915507 | Liquid average temperature measuring apparatus and method An apparatus for measuring the temperature of liquid in a tank is disclosed. This apparatus comprises a plurality of temperature sensors spaced apart so that each temperature sensor senses the temperature of a predetermined volume fraction of the liquid i... | 04/10/1990 |
| 4863279 | Operative temperature sensing system An operative temperature sensing system including a first circuit including an air temperature sensor for providing a first signal which is a function of the air temperature within a room, a second circuit which provides a second signal which is a functio... | 09/05/1989 |
| 4672842 | System and method for automatically monitoring liquid volume changes in storage tanks An automated liquid volume monitoring system and method for determining storage tank leak rate. Volume changes necessary to maintain storage tank liquid level, and volume changes due to temperature changes, are substantially constantly measured and calcul... | 06/16/1987 |
| 4618268 | Method and apparatus for sensing average temperature A device and method for detecting average temperature, particularly adapted for determining the average liquid temperature in an underground horizontally disposed cylindrical tank. The sensing element, in the form of a wire of known temperature versus ele... | 10/21/1986 |
| 4602872 | Temperature monitoring system for an electric generator A generator having stator windings which are water cooled includes a plurality of sensors each for measuring the temperature of cooling water as it is discharged from respective sections of the stator windings and prior to its collection in a common manif... | 07/29/1986 |
| 4597675 | Mean temperature sensor Method and apparatus for producing a signal analogous to the means temperature of fluid within a flow path is in a turbo machine. The fluid flowing in the flow path has a nonconstant temperature considered transversely thereto and defining a temperature p... | 07/01/1986 |
| 4583868 | Temperature differential detection device A temperature differential detection device for detecting the temperature differential between predetermined portions of a container wall is disclosed as comprising a Wheatstone bridge circuit for detecting resistance imbalance with a first circuit branch... | 04/22/1986 |
| 4580910 | Engine exhaust gas test harness In the maintenance of turbine propeller aircraft and related engines, test method and apparatus to measure engine exhaust temperature and exhaust pressure, without pulling the engine. Test harness associated with instrumental Jet Calibrator is interposed ... | 04/08/1986 |
| 4562732 | Device for detecting liquid amount in a vessel A device for detecting the amount of liquid in a vessel, such as a fuel tank of an automobile, using a torsion support member such as a torsion bar arranged between the vessel and the body of the automobile. The torsion displacement of the member correspo... | 01/07/1986 |
| 4556327 | Temperature averaging thermal probe A thermal probe (10) for averaging temperature fluctuations over a prolonged period is formed with a temperature sensor (22) embedded inside a solid object (12) of a thermally conducting material. The solid object is held in a position equidistantly space... | 12/03/1985 |
| 4525080 | Apparatus for accurately measuring high temperatures The present invention is a thermometer used for measuring furnace temperaes in the range of about 1800° to 2700° C. The thermometer comprises a broadband multicolor thermal radiation sensor positioned to be in optical alignment with the end of a blackb... | 06/25/1985 |
| 4494406 | Means for measuring large area mass flow Improved structure for measuring the air flow in large conduits, such as those used to supply air conditioning and heating ducts, by sampling substantially all of the cross sectional area of the conduit in a given transverse plane to obtain an average ele... | 01/22/1985 |
| 4384793 | Temperature profile monitoring method and apparatus The invention provides a method and apparatus for determining the approximate temperature profile of a large curved surface such as the outer surface of a chemical or hydrocarbon conversion reactor. At least two arrays of wire having a temperature depende... | 05/24/1983 |
| 4362403 | Means and method of sensing temperature Leaks are detected in liquid storage reservoirs by detecting any change in the level of liquid in the reservoir while monitoring the temperature of the liquid. The improvement of the present invention involves positioning a series of thermistors at strate... | 12/07/1982 |
| 4355760 | Control unit for a multi-unit building Three or more temperature sensors are positioned at various selected locations in a building. These sensors are connected to an averaging circuit whose function is to provide an electrical signal which is functionally related to the average temperature of... | 10/26/1982 |
| 4317366 | Method and system for measuring temperatures in combustion chambers The interior space of a combustion chamber, boiler, or other such gas-filled chamber exhibits an acoustic response spectrum to acoustic energy excitation which includes plural maxima attributable to acoustic natural-vibration frequencies. The frequencies ... | 03/02/1982 |
| 4186605 | Set of thermocouples for measuring the average of several temperatures in a given space A set of thermocouples for measuring the average of several temperatures in given space the thermocouples being connected in parallel by connecting wires of the same materials as the thermocouples proper. These connecting wires are constituted by portions... | 02/05/1980 |
| 4122720 | Diesel engine exhaust temperature monitor A diesel engine monitor monitors the exhaust gas temperature of each cylinder. A thermocouple is coupled to each cylinder and the monitor scans the analog signal output from each thermocouple which is proportional to the engine exhaust temperature of the ... | 10/31/1978 |
| 3968689 | Mounting thermocouples in internal combustion engines A gasket structure for supporting thermocouple junctions in a stream of gas passing through an internal combustion engine. The thermocouple leads are passed edgewise through a gasket, which is adapted to fit between the ports of an engine and the manifold... | 07/13/1976 |
