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| Number | Title | Issue Date |
| 7293605 | Feed-back control system for heat exchanger with natural shedding frequency The invention relates with the feed-back control system of a heat exchanger by use of the flow resonance phenomenon which maximizes the heat transfer efficiency by generating the flow disturbances of a heat transfer medium. If a heat transfer medium is periodically ... | 11/13/2007 |
| 7254502 | Method and device for detecting period length fluctuations of periodic signals To determine the period length of a first signal, the length is measured by counting the periods of a second signal with a shorter period length. To measure the fluctuations of the period length of the first signal whilst also taking into account the fluctuations of... | 08/07/2007 |
| 7231080 | Multiple optical input inspection system A system and method of inspecting electrical circuits with multiple optical inputs, including: obtaining first and second image data that are generally spatially coincidental but which each include some image data that is different, modifying one of the images by em... | 06/12/2007 |
| 7114343 | Method and apparatus for monitoring a condenser unit in a refrigerant-cycle system A real-time monitoring system that monitors various aspects of the operation of a refrigerant-cycle system is described. In one embodiment, the system includes a processor that measures power provided to the refrigerant-cycle system and that gathers data from one or... | 10/03/2006 |
| 7069976 | Method and arrangement for controlling the temperature of the outstream flow from a heat exchanger and measuring produced heat Process and device for controlling the temperature of an outbound secondary flow in a secondary circuit from a heat exchanger by a primary flow in a primary circuit, via a member that regulates the primary flow, influenced by a control unit. The enthalpy difference ... | 07/04/2006 |
| 6973793 | Estimating evaporator airflow in vapor compression cycle cooling equipment A method for determining airflow through an evaporator coil in a vapor compression cycle by measuring the moist air conditions entering and leaving the coil, and various temperatures and pressures in the refrigerant of the vapor compression cycle. The mass airflow r... | 12/13/2005 |
| 6960017 | Non-invasive energy meter for fixed and variable flow systems An energy metering method and apparatus for liquid flow systems comprising first and second segments of one or more conduits through which a liquid flows, comprising: attaching a first temperature sensor for connection to an outside of the first conduit segment; att... | 11/01/2005 |
| 6942381 | Molten cryolitic bath probe A method and apparatus for accurately measuring superheat, bath ratio and alumina concentration in an aluminum smelting bath. In one embodiment, a reusable probe determines the bath temperature and bath sample superheat. In other embodiments, the probe also determin... | 09/13/2005 |
| 6783272 | Induction-heated disc tribometer A disc tribometer for measuring tribological, mechanical and thermal phenomena including at least a first rotary support for receiving a test sample, a second rotary support for receiving a second test sample, means for measuring torque applied to each of the suppor... | 08/31/2004 |
| 6703246 | Thermal method and apparatus A thermal method for studying chemical responses, such as catalyzed polymerization reactions that includes the following three steps. The first step is to flow a chemical substance through a conduit, the conduit being in thermal communication with an elec... | 03/09/2004 |
| 5440566 | Fault detection and diagnosis for printed circuit boards A method for detecting an diagnosing faults in printed circuit boards. Emissivity data and thermal image data of the various components of the board are obtained. The emissivity data is used to correct the thermal image data. The corrected data is convert... | 08/08/1995 |
| 5415024 | Composition analyzer for determining composition of multiphase multicomponent fluid mixture A composition analyzer and a method of use for determination of the masses of individual components in a multiphase multicomponent fluid system containing a gas. Data and relationships not measured by the analyzer during operation but required by the meth... | 05/16/1995 |
| 5398694 | Animal biocalorimeter and waste management system A biocalorimeter and waste management system is provided for making metabolic heat release measurements of animals or humans in a calorimeter (enclosure) using ambient air as a low velocity source of ventilating air through the enclosure. A shroud forces ... | 03/21/1995 |
| 5255977 | Method and device for monitoring the efficiency of a condenser The invention relates to a method and to an apparatus for monitoring the heat transfer and therefore the efficiency of a condenser. A water column is formed by shutting off a condenser pipe which assumes the steam temperature Ts and whose outfl... | 10/26/1993 |
| 5215704 | Method and apparatus for in situ testing of heat exchangers Using the method of this invention, the performance of a heat exchanger is determined by measuring the heat transfer capabilities of an individual tube. A relatively small reservoir of service fluid is connected to the inlet and outlet ports of a tube. Th... | 06/01/1993 |
| 5156459 | Radiation beam calorimetric power measurement system A radiation beam calorimetric power measurement system for measuring the average power of a beam such as a laser beam, including a calorimeter configured to operate over a wide range of coolant flow rates and being cooled by continuously flowing coolant f... | 10/20/1992 |
| 5153823 | Device to measure and/or control flow-through and/or quantity of heat A device for measuring or controlling a property of a flow medium comprises a conduit which carries a flow medium. A choke element located in the conduit has a first open operating position and a second closed operating position. A driver drives the choke... | 10/06/1992 |
| 5135311 | Convective calorimeter apparatus and method A direct convective air flow calorimeter characterized by fast response time, high efficiency, and transient, as well as steady state, heat measurement capability. The calorimeter generally measures sensible and insensible heat losses, and may measure ind... | 08/04/1992 |
| 5125753 | Device to measure flow-through and/or quantity of heat A heat circuit comprises an initial conduit containing a flow medium and a return conduit. A choke element located in a conduit such as the initial conduit of a heat circuit serves to control the flow of the flow medium. The choke element has several acti... | 06/30/1992 |
| 5026171 | Apparatus for flow rate and energy transfer measurements Temperaature sensors at the inlet and outlet of a heat exchanger are utilized in the disclosed apparatus to measure the temperature of the fluid and to ascertain the the time taken by a localized gradient in heated or cooled fluid to pass through the heat... | 06/25/1991 |
| 4928751 | Computer controlled waste heat reclaimer A waste heat reclaimer takes in hot waste gases from stacks or flues, associates them with a primary flow of water, heating the water and cooling the gases. The heated water flows through a heat exchanger transferring that heat to a secondary flow of wate... | 05/29/1990 |
| 4795267 | Calorimeter using remanence type electromagnetic flowmeter A calorimeter using a remanence type electromagnetic flowmeter includes a core made of a semi-hard or hard magnetic material and having a property in which a remanent magnetic flux density is varied in proportion to a temperature, a coil excited intermitt... | 01/03/1989 |
| 4779458 | Flow sensor A flow-sensing system is provided which employs a pair of sensing resistors. One of the resistors is disposed within flowing fluid, while the other is shielded from the flow. The sensor resistances are held constant by identical feedback circuits which ma... | 10/25/1988 |
| 4773023 | Apparatus for measuring the rate of heat dissipation Apparatus for measuring the rate of sheet dissipation from a load immersed in a flowing fluid includes an upstream and downstream transducer. These transducers are located upstream and downstream of the load for providing an upstream and downstream signal... | 09/20/1988 |
| 4618266 | Measurement of energy in flowing fluid Energy transmitted to a load in a fluid medium is measured utilizing a probe having an elongate heat transmitter that includes a sensing tip at one end, a heat exchanger at its opposite end, a thermal impedance forming at least a segment of the heat trans... | 10/21/1986 |
| 4591988 | Energy cost allocation method and system A method for allocating energy costs comprises sensing a first parameter; comparing the sensed parameter with a selectable value of the parameter; initiating recording of data when the sensed parameter bears a predetermined relation to the selectable valu... | 05/27/1986 |
| 4577977 | Energy submetering system A system for submetering artificial energy consumption in a multi-user environment in which a single central system source services the several separate users by means of individual space conditioning subsystems is disclosed which enables accurate proport... | 03/25/1986 |
| 4531843 | Calorimeter A calorimeter for the measurement of a quantity of heat given up by a fluidic medium in at least one heat exchanger, with an impellerless flow velocity measuring device as well as temperature sensors for determining the forward flow-return flow temperatur... | 07/30/1985 |
| 4484620 | System for monitoring energy usage in separate units of multiple-unit structure A system of monitoring energy usage for heating or cooling separate units in a multi-unit structure employing thermostat means to control delivery of hot or cold fluid to the unit, an elapsed time meter, a first circuit interconnecting the thermostat with... | 11/27/1984 |
| 4485449 | Method and apparatus for the direct measurement of thermal energy transferred by a fluid medium In the direct measurement of thermal energy transferred in heating or air conditioning installations, the difference between voltages from outflow and return flow temperature sensors is integrated during a first timing period and then discharged during a ... | 11/27/1984 |
| 4482006 | Thermal energy meter A device for monitoring the thermal energy consumed by a single unit of a multi-unit building having a central heating and/or cooling space conditioning system, said device comprising a monitoring system responsive to the temperature levels contained in s... | 11/13/1984 |
| 4448545 | Non-intrusive thermal power monitor and method A non-intrusive thermal power monitor and method for determining the amount of sensible heat withdrawn from or added to a fluid stream flowing in a conduit by an unknown source includes a thermal power transfer device that supplies or removes a known amou... | 05/15/1984 |
| 4393919 | Thermal energy meter A device for monitoring the thermal energy consumed by a single unit of a multi-unit building having a central heating and/or cooling space conditioning system. Said device comprising a monitoring system responsive to the temperature levels contained in s... | 07/19/1983 |
| 4388003 | Heat-meter and flow-meter apparatus The disclosed apparatus includes a heat meter and a flow meter. The heat meter includes means for delivering trains of pulses to a heat register, the pulses per train being proportional to the temperature difference between fluid inlet and outlet passages... | 06/14/1983 |
| 4358208 | Apparatus for determining enthalpy of a fluid medium Enthalpy quantities such as the degree of moisture of gases, the wetness of steam or the enthalpy of dry steam are measured by passing a specific amount or dosage of a gas or steam through a system such as a cooler or dryer wherein its thermal condition i... | 11/09/1982 |
| 4337655 | Valve provided with a measuring instrument and intended for a moving medium A valve unit for a flowing medium is combined with an electrical measuring system to provide measurement of the rate of flow of the medium. The valve unit is connected to a propeller-type rotor disposed in a conduit which communicates with the valve. The ... | 07/06/1982 |
| 4332164 | BTU Meter The temperatures at the inlet and the outlet of a solar energy collector being flown through by water are detected and compared with a ramp signal to provide a pulse train in which the number of pulses represents the temperature differential. The ramp sig... | 06/01/1982 |
| 4304127 | Measurement of delivered thermal units Apparatus and a method are described for measuring heating and/or cooling of air or other fluid that occurs between an inlet and an outlet, one being a low-temperature passage and the other being a high-temperature passage. Heat is supplied to a temperatu... | 12/08/1981 |
| 4250747 | Heat meters A heat meter comprises a transducer (6) for measuring the rate of flow of water through a conduit (58) and a transducer (10) for measuring the temperature difference between two spaced locations (90, 92) of the conduit (58). The output of the flow rate tr... | 02/17/1981 |
| 4245501 | Selective heating and cooling energy meter The disclosed apparatus includes separate "heat" and "cool" registers and selective switching means that connects the output of a thermal energy computer to one register or the other in accordance with use of a room heat-exchanger to produce heating or co... | 01/20/1981 |
