Did You Know...
...that after Parker Brothers executives turned down the game of Monopoly because it had "52 fundamental errors" (including taking too long to play), a copy of the game wound up in the home of the company president who stayed up until 1 a.m. to finish playing it? He was so impressed by the game that the next day he wrote to inventor Charles Darrow and offered to buy it!
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| Number | Title | Issue Date |
| 7278409 | System for controlling the temperature of the intake air in internal combustion diesel engines The system is meant to heat the intake air in internal combustion Diesel engines and is based on the use of a resistor having two segments (1) and (1′) joined to each other on one end (2), the segments (1) and (1′) being made o... | 10/09/2007 |
| 7201049 | Pulsed thermistor sensor A thermistor is pulsed with energy, and a time constant of decay of temperature is calculated based on measured resistance of the thermistor over a number of known intervals. The time constant is representative of the mass air flow. The ambient air temperature may b... | 04/10/2007 |
| 7119308 | Forced-air heater control system and method The present invention relates to a forced-air electric heater control system for HVAC systems. One embodiment utilizes two heat sensors which are positioned upstream and downstream, equidistant from the heating element(s). The control system, in this embodiment, tak... | 10/10/2006 |
| 7075652 | Apparatus and method for measuring temperature dependent properties of liquid The present invention relates generally to a method and apparatus for measurement of optical properties of a liquid as a function of temperature. The method and apparatus are based on formation of a stable temperature gradient through the holding cell containing the... | 07/11/2006 |
| 7028544 | Mass flowmeter for measuring by the CT method A mass flowmeter of the thermal type provided with a flow sensor with a flow tube through which a fluid can flow during operation, with a temperature sensor in an upstream position (A) and a heater (H) in a downstream position (B), and power control means and temper... | 04/18/2006 |
| 7012223 | Forced-air heater control system and method The present invention relates to a forced-air electric heater control system for HVAC systems. One embodiment utilizes two heat sensors which are positioned upstream and downstream, equidistant from the heating element(s). The control system, in this embodiment, tak... | 03/14/2006 |
| 6945106 | Mass flowmeter A mass flowmeter of the thermal type, having a planar, thin substrate with a sensing surface that can be brought into direct or indirect contact with a flowing fluid during a measurement, wherein electrically controllable heating elements and temperature sensor elem... | 09/20/2005 |
| 6722781 | Motion sensor for flat objects A simple method and apparatus for contactless rapid and inexpensive motion checking of flat objects, preferably of currency papers. The objects need not be identical in size, thickness, surface appearance, configuration nor deterioration. The checking is carried out... | 04/20/2004 |
| 6622543 | Gas detection sensor A gas detection sensor permits precise measurement of the concentration of flammable gas in a detection or subject gas and the concentration of oxygen in a detection gas containing flammable gases. In the sensor, the heating of the sensor by contact catal... | 09/23/2003 |
| 6553828 | Cooled dual element thermocouple computer and flow velocity measurement method Embodiments of a flowmeter and velocity measurement method are described, which include preferably a dual element thermocouple that is immersed in a flowing fluid and a computer that processes, validates, and calculates data to arrive at a velocity measur... | 04/29/2003 |
| 6382024 | Thermocouple boundary layer rake Apparatus and method for providing a velocity flow profile near a reference surface. A measuring device utilizes a plurality of thermojunction pairs to provide the velocity flow profile in accordance with behavior of a gas relative to a constant thickness... | 05/07/2002 |
| 6338271 | Device and process for measuring the velocity of flow of a fluid A device for measuring the velocity of flow of a fluid, with at least one thermocouple (10), whose junction point is arranged in the fluid, with an a.c. power source (11) heating the thermocouple to a working temperature higher than the temperature of the... | 01/15/2002 |
| 6086251 | Process for operating a thermocouple to measure velocity or thermal conductivity of a gas A process for operating a thermocouple (2), which is arranged in a gas atmosphere and is maintained at a working temperature that is increased compared with the gas temperature by means of an a.c. power source (11). The determination of the thermal power ... | 07/11/2000 |
| 6058774 | Device for detecting flow of a fluid including a temperature measuring instrument The invention relates to a device for detecting flow of a fluid, having a temperature measuring instrument (4), which comprises at least a first and a second temperature measuring point (P1 and P2), and a heating element (20), which is disposed substantia... | 05/09/2000 |
| 5831159 | Thermopile flow sensor A flow sensor adapted for placement along a pacing lead or other catheter comprises a thermopile formed on the outer surface of a tubular substrate. The thermopile comprises a plurality of interconnected conductors of an alternating metal type. Junctions ... | 11/03/1998 |
| 5677484 | Device for measuring the flow in a fluid channel A device for measuring the flow of a fluid in a fluid channel, with at least one thermocouple, whose thermojunctions are arranged one behind the other in the direction of flow of the fluid and are maintained at a working temperature higher than the fluid ... | 10/14/1997 |
| 5629482 | Measuring device utilizing a thermo-electromotive element To provide a flow rate sensor of minimized power consumption. Form a Fe pattern 104 and Pt pattern 103 on the surface of a diamond thin film 101 by sputtering or evaporation to construct a thermo-electromotive element. Also, form a heating unit 102. On pulsewi... | 05/13/1997 |
| 5557967 | Thermopile flow sensor A flow sensor adapted for placement along a pacing lead or other catheter comprises a thermopile formed on the outer surface of a tubular substrate. The thermopile comprises a plurality of interconnected conductors of an alternating metal type. Junctions ... | 09/24/1996 |
| 5423211 | Sap flow gauge A sap flow gauge (10) which can accommodate stem or other plant parts (S, S') of very small and/or varying cross-sectional configuration is provided which includes a generally U-shaped body (12) presenting a central bight portion (50), a pair of spaced, o... | 06/13/1995 |
| 5367905 | Sap flow gauge A sap flow gauge (10) which can accommodate stem or other plant parts (S, S') of very small and/or varying cross-sectional configuration is provided which includes a generally U-shaped body (12) presenting a central bight portion (50), a pair of spaced, o... | 11/29/1994 |
| 5337604 | Apparatus for measuring sap flow A device for measuring sap flow in a stem region comprises a rigid housing, configured like a clam-shell, and insulated and sealed from intrusion from radiation or water or weather by a collar which circumscribes the housing situated around the stem regio... | 08/16/1994 |
| 5313831 | Radial junction thermal flowmeter A thermal flowmeter to measure the rate of flow of a fluid in a conduit is provided. An important characteristic of the flowmeter is that it includes two radial junction thermocouples, one of them a downstream radial junction thermocouple and the other an... | 05/24/1994 |
| 5269183 | Apparatus for measuring sap flow A device for measuring the sap flow in herbaceous plants and trees directly without the necessity of an empirical calibration, using the heat balance method. A strap-on, removable, and reusable collar device powered by a 0.2 to 5.0 watt heater is abuttabl... | 12/14/1993 |
| 5119674 | Flowmeter A flowmeter comprising a thermocouple with hot and cold junctions and a current source for causing a termperature difference between the hot and cold junctions of the thermocouple. The thermocouple is connected to the current source through a controlled s... | 06/09/1992 |
| 5048332 | Flow meter for measuring fluid flow with multiple temperature sensors A part of a tube, through which a fluid passes, is cooled by means of an electronic cooling element and a flow rate of the fluid is measured on the basis of a temperature of a surface of the tube cooled. Not only can the flow rate of the liquid flowing th... | 09/17/1991 |
| 5038609 | Thermal type flow detecting apparatus A thermal type flow detecting apparatus comprises a thermoelectric detecting element (5) having a base material (1) of a ceramics semiconductor and detecting electrodes (2, 3) respectively arranged in the vicinity of both longitudinal ends on one major su... | 08/13/1991 |
| 5003820 | Electronic speedometer for snow skis The electronic speedometer of this invention accurately calculates and digitally displays a skier's instantaneous speed. The device accomplishes this task by employing the "hot wire" principle using a thermistor and a thermocouple which are exposed to air... | 04/02/1991 |
| 4932250 | Multi point sensor The invention provides a thermocouple device comprising a base wire 1 and a plurality of junctions 3 spaced along said wire, each of said junctions being connected to a monitoring means which provides a visual indication of the temperature at each junctio... | 06/12/1990 |
| 4890489 | Direction-sensitive flow-rate indicator A direction-sensitive flow velocity meter in which at least first and second thermocouples of the Seebeck type are arranged in a symmetrical layout in a common semiconductor substrate. The configuration is such that imaginary lines joining the junction en... | 01/02/1990 |
| 4848147 | Thermal transient anemometer A thermal transient anemometer having a thermocouple probe which is utilized to measure the change in temperature over a period of time to provide a measure of fluid flow velocity. The thermocouple probe is located in the fluid flow path and pulsed to hea... | 07/18/1989 |
| 4821700 | Device for determining mass flow and direction of flow In order to determine the correct mass flow of a rapidly pulsating stream of fluid, in particular in the intake duct 10 of an internal combustion engine, a device for determining the mass flow and the direction of flow is proposed which has a temperature ... | 04/18/1989 |
| 4782708 | Thermocouple sensors An air flow sensor which employs a thermocouple using a film of bismuth0.92 antimony0.08 to form junctions with gold, platinum or nickel strips and a resistive strip heater of the same metal.... | 11/08/1988 |
| 4774833 | Device for determining mass flow and direction of flow In order to determine the correct mass flow of a rapidly pulsating stream of fluid, in particular in the intake duct 10 of an internal combustion engine, a device for determining the mass flow and the direction of flow is proposed which has a temperature ... | 10/04/1988 |
| 4745805 | Process and device for the measurement of the flow of raw sap in the stem of a plant such as a tree A process for the measurement of the flow of raw sap in the stem of a tree or other plant, and a device for the embodiment of the process. According to this process, two holes of small diameter are made in the stem, preferably one above the other, and a h... | 05/24/1988 |
| 4587843 | Thermocouple-type gas-flow measuring apparatus A gas-flow measuring apparatus including a plurality of thermocouples formed in series on a substrate. Every other thermojunction of the thermocouples is located upstream of an electric heater, while the remaining thermojunctions of the thermocouples are ... | 05/13/1986 |
| 4561303 | Mass airflow sensor with backflow detection A mass airflow sensor with backflow detection includes a first, second, and third elongated, relatively thin silicon members generally parallel to each other and spaced from each other in an orienting plane. The second silicon member, between the first an... | 12/31/1985 |
| 4373386 | Direction sensitive flow velocity meter and sensing plate to be used on it In a direction sensitive flow velocity meter for a gas or a liquid, including a sensing plate having a sensor part and a heat generating element, and an electronic circuit for processing the electric signals furnished by the sensor part, the sensor part c... | 02/15/1983 |
| 4220039 | Fluid temperature compensator circuit for a thermal gauge probe A circuit including an amplifier and resistance thermal device is interposed in and supplements the heat dissipation measuring circuit of a fluid thermal gauge probe for detecting the actual temperature of a fluid medium under test in a closed system and ... | 09/02/1980 |
| 4083243 | Method of measuring the mass flow rate of a substance entering a cocurrent fluid stream This invention relates to an improved method of monitoring the mass flow rate of a substance entering a cocurrent fluid stream. The method very basically consists of heating equal sections of the fluid stream above and below the point of entry of the subs... | 04/11/1978 |
| 4016758 | Thermal gauge probe A thermal type flowmeter comprising an elongated relatively small tubular probe, adapted to be inserted through a wall of a fluid containing vessel, contains an electrical resistance heater for heating the probe to a predetermined temperature. The electro... | 04/12/1977 |
