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 |
| 4797834 | Process for controlling a pump to account for compressibility of liquids in obtaining steady flow An apparatus and method controls a dual piston pump for a liquid chromatography system so as to pump a flow of solvent through the liquid chromatography column at a constant flow rate and with a solvent composition which is substantially equal to the desi... | 01/10/1989 |
| 4739923 | Hot/cold water mixing device A hot/cold water mixing device includes a hot water supply valve disposed in a hot water feed pipe for regulating the amount of hot water passing therethrough, a cold water supply valve disposed in a cold water feed pipe for regulating the amount of cold ... | 04/26/1988 |
| 4731731 | Dialysis machine having enhanced D/A resolution A dialysis machine has control circuit which detects changes in input water temperature and compensates the water heater. The control circuit detects changes in the conductivity of the dialysate concentrate and compensates the concentrate pump. Changes in... | 03/15/1988 |
| 4719574 | Batch control system The batch control system is used in a batching system for controlling the batching of a fluid material from one container to another container through a conduit having a pump coupled therein, a flowmeter coupled therein and a valve coupled therein. The ba... | 01/12/1988 |
| 4718022 | Dialysis machine which anticipates concentration changes A dialysis machine has control circuit which detects changes in input water temperature and compensates the water heater. The control circuit detects changes in the conductivity of the dialysate concentrate and compensates the concentrate pump. Changes in... | 01/05/1988 |
| 4693415 | Method and circuitry for control of a sanitary mixer for cold and hot water In a method for control of a sanitary mixer for cold and hot water, merely the actual temperature is continuously measured in the mixed water and compared to a preset temperature. At least two separate, time-varying regulating values, used for electromech... | 09/15/1987 |
| 4682728 | Method and apparatus for controlling the temperature and flow rate of a fluid A method and apparatus for controlling the mixing of two fluids to form a mixed fluid, and the volume discharge rate of the mixed fluid. In a particular application, the two fluids are hot and cold water, and the mixing is controlled to effect temperature... | 07/28/1987 |
| 4648043 | Computerized system for feeding chemicals into water treatment system A computerized chemical application system for a water treatment system. The water treatment system includes a main header conduit through which water flows. Connected in shunt with the main header is a chemical introduction header of smaller diameter and... | 03/03/1987 |
| 4642766 | Method and means of control for multi-source feedstock distribution system including optimization of supplies A multi-source feedstock distribution system is controlled by an optimization so as to substantially minimize the total cost of the feed while also meeting set points for flow rate and composition to feedstock users supplied by the multi-source feedstock ... | 02/10/1987 |
| 4618935 | Liquid chromatography controller A new and improved controller for creating a linear gradient dual solvent flow pattern in a dual pump liquid chromatography system wherein one pump pumps one solvent and the other pump pumps the second solvent, the controller comprising a clock for produc... | 10/21/1986 |
| 4611294 | Method of and apparatus for monitoring odorizer performance A method and apparatus for monitoring the rate of addition of an additive fluid that is to be added to a main fluid stream in a gas pipeline system. A monitoring interval is defined by selecting a base measurement parameter, and the flow rate of the main ... | 09/09/1986 |
| 4607342 | Apparatus for remotely measuring and controlling the carbon dioxide in a beverage liquid: on-line This device periodically isolates a sample of a beverage in production and determines the level of Carbon Dioxide present in the sample by the pressure temperature method. This system eliminates the overpressure in the line and then computes the carbonati... | 08/19/1986 |
| 4604902 | Means and techniques useful in mass flowmeters for multiphase flows A mixture of two materials flows through a first measuring station which includes a Venturi meter for obtaining and measuring a pressure difference Ɗp that is representative of mass flow rate of the mixture and velocity. The mixture then flows through a ... | 08/12/1986 |
| 4576570 | Automatic combustion control apparatus and method A method and apparatus for controlling the combustion of multiple fuels, especially fuels having diverse combustion air requirements. A heating rate demand signal indicative of the heating rate desired is generated and is compared with a fuel based fuel h... | 03/18/1986 |
| 4563780 | Automated bathroom An automatic computer controlled bathroom includes a shower, bathtub, sink and toilet which can all be electronically controlled. The sink and shower include water temperature sensors and valves which direct the water to the drain if it is outside of a pr... | 01/14/1986 |
| 4494209 | Blending control system A control system for blending a rich stream with a diluting stream to obtain a blended stream comprises obtaining values for specific gravities of the rich and diluted streams, a ratio of densities of primary and secondary components in the rich stream an... | 01/15/1985 |
| 4487333 | Fluid dispensing system A fluid dispensing method and apparatus particularly adapted for post-mix dispensing of a soft drink, with accurate relative proportions of carbonated water and soft drink syrup. Separate syrup and water valves are controllably turned on and off, independ... | 12/11/1984 |
| 4420008 | Method for transporting viscous crude oils Viscous crude oil is mixed with an oil diluent having a relatively low viscosity and the resulting mixture having a predetermined viscosity and flow rate is pumped in a pipeline to a point of use. The flow rates of the viscous crude oil and the diluent ar... | 12/13/1983 |
| 4420811 | Water temperature and flow rate selection display and control system and method Apparatus and method for selecting, displaying and automatically controlling water flow rates and temperatures at the outlets of devices used in plumbing fixtures such as sinks, bathtubs, showers, or lavatories; the apparatus includes a temperature sensor... | 12/13/1983 |
| 4358827 | Controlling the treatment of mixtures comprising solid and liquid Treatment equipment for mixtures comprising solid and liquid is controlled by determining a value comprising the cumulative mass throughput of solid and an inverse term comprising total treatment time, and monitoring said value substantially continuously ... | 11/09/1982 |
| 4340938 | Net oil computer Voltage pulses, whose frequency represents the flow rate of a stream of oil well production fluids, generate a train of clock pulses. Each train of clocked pulses is characterized into a non-linear analog ramp and compared with a matching non-linear analo... | 07/20/1982 |
| 4215409 | Flow control system for anesthesia apparatus An electronic analgesia/anesthesia apparatus is provided for the administration of a mixture of gases. This said apparatus has separate controls for independently increasing or decreasing the flow rate of each particular gas to be delivered thereby and in... | 07/29/1980 |
| 4096028 | Feed forward control of dissolved solids in a countercurrent separation and washing zone A technique for controlling the amount of dissolved material in a slurry liquid stream containing dispersed particulate solids which is being continuously processed in a zone of countercurrent particulate solids separation and washing. Flow rates and cond... | 06/20/1978 |
| 4084246 | Pulse generator A pulse generator for producing two output pulse trains A and B where the total number of pulses in both train A and B over a fixed time period remains a constant. The two pulse trains are derived from a master clock which gates a plurality of cascade con... | 04/11/1978 |
| 4056002 | Component flow rate measurement in two-phase systems Process and apparatus for accurately measuring the volume or mass flow rate of each component phase of a two-phase mixture. In particular, mixtures of crude oil and natural gas in changing proportions and having fluctuating differential flow velocities ar... | 11/01/1977 |
| 4008829 | Ratio controlled mixing of liquids Apparatus is described for the controlled mixing of liquids in a predetermined ratio and is especially suitable for the dispensing of predetermined ratios of polyol and polyisocyanate liquids in the liquid injection molding of polyurethane articles. The r... | 02/22/1977 |
| 4006349 | Monitoring apparatus for a pneumatic conveyor system A monitoring system measures the flow of solids in a pneumatic conveying system having a conduit with an air inlet, a solids inlet, and a mixture outlet. A pressure transducer responds to pressure in the conduit to produce a pressure-representing signal. ... | 02/01/1977 |
