Did You Know...
...that Robert Adler has the dubious distinction of being the Father of the Couch Potato? Back in 1955 Adler was employed by what was then Zenith Radio Corp., where he was charged to invent something that would allow viewers to turn down the TV volume without leaving their chairs. After a series of flops (such as a wired contraption that people tripped over), Adler hit on the idea of using sound waves. Thus the Remote Control was born...
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| Number | Title | Issue Date |
| 4545029 | Remote correlation of sequence of events A method for correlating in a digital data acquisition system the time sequence of a group of events at locations remote from the master station. The method corrects the time tags on the events record for the signal transmission time between the master an... | 10/01/1985 |
| 4492948 | Fast response surface contact temperature sensor A high speed, high accuracy surface temperature measuring probe of the contact type including a thin-film platinum resistance thermometer mounted in a support assembly having a low specific heat and low conductivity with a thin pure copper end cap in ther... | 01/08/1985 |
| 4473889 | Remote correlation of sequence of events A method for correlating in a digital data acquisition system the time sequence of a group of events at locations remote from the master station. The method corrects the time tags on the events record for the signal transmission time between the master an... | 09/25/1984 |
| 4469717 | Thin film resistance thermometer with a predetermined temperature coefficient of resistance and its method of manufacture A thin film resistance thermometer is manufactured to have a predetermined temperature coefficient of resistance while minimizing the amount of metal in the film. The process involves the production of a metal film deposit on an insulating substrate such ... | 09/04/1984 |
| 4429343 | Humidity sensing element A humidity sensing element of the capacitance sensing type having two sets of interdigitated fingers of thin film platinum deposited on a glass substrate, all covered by a coating of water absorbing material such as cellulose acetate butyrate or a silicon... | 01/31/1984 |
| 4419733 | Time deviation and inadvertent interchange correction for automatic generation control A method for modifying an area control error signal for controlling the generation in each area of a multiple-area interconnected electric power system using net-interchange tie-line bias control where the area control error is calculated in accordance wi... | 12/06/1983 |
| 4417303 | Multi-processor data communication bus structure A bus structure for the interconnection between a data bus capable of transferring a plurality of words and a local bus which can carry only one word. This structure includes latches for storing the plurality of words for simultaneous transfer over the da... | 11/22/1983 |
| 4407013 | Self tuning of P-I-D controller by conversion of discrete time model identification parameters A P-I-D controller in a process control system is self tuned in response to discrete time model identification parameters which are converted to P-I-D form. Additionally, the P-I-D parameters are limited to prevent them from exceeding the controller's spe... | 09/27/1983 |
| 4390925 | Multiple-cavity variable capacitance pressure transducer A plurality of recesses and interconnecting paths are etched into the surface of a silicon wafer. A plate of borosilicate glass carrying thin-film metal deposits in a corresponding pattern is electrostatically bonded to the silicon to form a multiple-cavi... | 06/28/1983 |
| 4390796 | Voltage to duty cycle converter An analog voltage to duty cycle converter is provided using a series connected resistor and capacitor. The capacitor is charged in one direction through the resistor from the difference between the analog voltage and a reference voltage maintained across ... | 06/28/1983 |
| 4389674 | Preamplifier for low voltage signals in the presence of high voltage noise A preamplifier for use primarily with a solid state line scanner for amplifying the signal output from the scanner and suppressing the noise from switching spikes featuring a cascode-connected input stage in a preamplifier having its gain stabilized by ne... | 06/21/1983 |
| 4385362 | Filter arrangement for elimination of unwanted bias in a model reference process control system Unwanted bias is eliminated from a process control system by high pass filters which are disposed between the process and the process model.... | 05/24/1983 |
| 4375663 | Power failure early warning circuit for microprocessor with CMOS RAM memory A circuit for preventing data transfers to a RAM by a microprocessor when primary ac power fails also puts the RAM in standby after a period adequate to complete any data transfer started. The sequence is provided by providing a first signal to the microp... | 03/01/1983 |
| 4375333 | Microprocessor directed optical pyrometer A portable automatic disappearing filament optical pyrometer having low power demand incorporating a solid state line scanner as a sensing element is controlled by a microprocessor to perform a balance between the radiation from a target and a lamp filame... | 03/01/1983 |
| 4375056 | Thin film resistance thermometer device with a predetermined temperature coefficent of resistance and its method of manufacture A thin film resistance thermometer is manufactured to have a predetermined temperature coefficient of resistance while minimizing the amount of metal in the film. The process involves the production of a metal film deposit on an insulating substrate such ... | 02/22/1983 |
| 4374351 | Digital drive unit regulator A means to change the position of a drive unit in accordance with desired changes periodically provided as a digital value and entered in a first register, which is then decremented to zero by counting actual increments of drive unit change. Power to chan... | 02/15/1983 |
| 4368510 | Automatic identification system for self tuning process controller A process for automatically identifying the parameters of a controller which controls a process and a process model which includes changing alternately the set point for the process by a predetermined value above and below the desired set point of the pro... | 01/11/1983 |
| 4337434 | Compensator for slowly responding sensors A signal compensating network for use with a sensing element having different rates of response for increasing or decreasing sensed quantities includes a differentiating amplifier having different time constants for increasing and decreasing input signals... | 06/29/1982 |
| 4337456 | Analog to digital converter with offset error correction An analog to digital converter of the ramp-integrator type with provisions to reduce errors due to offset voltages. The cycle which is utilized includes a preconditioning cycle during which the capacitor is charged while the input to the buffer amplifier ... | 06/29/1982 |
| 4333352 | Injection-molded Doppler flowmeter transducer assembly A transducer housing assembly for an ultrasonic flowmeter made by an injection molding having a pair of pedestals for supporting the transducers at a specific angle while acoustically isolating the transducers from each other and providing an air backing ... | 06/08/1982 |
| 4315211 | Preamplifier for voltage measuring instrument with non-interacting zero and span controls A preamplifier circuit for a voltage measuring instrument which provides for noninteracting span and zero adjustments. Two voltage follower circuits are used. The first produces a current through the output resistor of the preamplifier proportional to the... | 02/09/1982 |
| 4280365 | Ultrasonic Doppler flowmeter with correction for vibratory signals at zero-flow conditions An ultrasonic Doppler flowmeter for measuring flowing fluid by reflection of sonic waves from particles in the fluid is provided with a discriminating circuit including a comparator amplifier connected to the received signal that produces a zero-flow outp... | 07/28/1981 |
| 4278052 | Boiler control system A boiler control system for boilers fired by solid fuels wherein the fuels are carried through the combustion zone of the boiler on a traveling grate and wherein the air flow for combustion as supplied to the undergrate region utilizes a control of the fu... | 07/14/1981 |
| 4274284 | Expandable phase change detector device An expendable phase change detector device is provided with an initial coating on the twisted wire forming the thermocouple junction which is, in turn, covered by a refractory coating during the manufacture of the device. The initial coating responds to a... | 06/23/1981 |
| 4271473 | Control of parallel operated turbines in cogeneration A control system is provided for turbines in the utility part of an industrial plant using cogeneration so that control is maintained over the relative quantities of steam supplied to a common steam header from both the back pressure and the extraction tu... | 06/02/1981 |
| 4265538 | Optical sample cell for analysis of particles in liquid suspension A rectangular sample cell for use in the measurement of the light scattered from an incident light beam in three mutually orthogonal directions is constructed with a prism having its base optically in contact with the sample along a side of the cell. Two ... | 05/05/1981 |
| 4245914 | Sample cell window cleaning device Apparatus for wiping the optical window of a sample cell in a turbidimeter or other particle measuring instrument for analyzing a liquid sample. The wiping apparatus is operated by the pressure of the source of supply of the liquid sample and avoids the n... | 01/20/1981 |
| 4241701 | Method and apparatus for controlling steam temperature at a boiler outlet Boiler outlet temperature in a sliding pressure operation is controlled in a routine way by varying the fluid or heat distribution in the boiler. The effect a change in pressure has on steam temperature is anticipated by supplying a feedforward signal to ... | 12/30/1980 |
| 4242659 | Thin film resistance thermometer detector probe assembly A resistance thermometer probe assembly is constructed by locating a header assembly in the end of a cylindrical sleeve. The header is constructed as a stack of discs. The disc exposed to the environment is of stainless steel and the disc supporting the t... | 12/30/1980 |
| 4240149 | Measuring system There is provided a method for measuring a parameter whose value is calculable as an integral with time of a function of at least one variable so as to make possible the use of a microprocessor when measurements of such variables are desired. The variable... | 12/16/1980 |
| 4229230 | Expendable immersion thermocouple An expendable immersion thermocouple having a cup-shaped body member for supporting the thermocouple and providing a cavity into which a refractory cement is poured to secure the thermocouple in place. The refractory cement is nonhomogeneous and has a sur... | 10/21/1980 |
| 4213304 | Boiler control system A method and means for controlling the throttle pressure of a fuel fired drum type boiler by controlling the fuel input to the boiler so as to equalize the boiler demand, calculated as the product of a quantity proportional to the rate of energy output fr... | 07/22/1980 |
| 4209831 | Method and apparatus for controlling an interconnected distribution system which includes a jointly owned generating unit In a power distribution system comprising interconnected distribution areas which includes a jointly owned unit, that jointly owned unit is controlled to allocate regulating outputs for the areas participating in the joint ownership in accordance with the... | 06/24/1980 |
| 4208908 | Speed of sound compensation for Doppler flowmeter An ultrasonic Doppler flowmeter in which the transmitting and receiving transducers are located in a head that is secured to the outer surface of a pipe through which the fluid to be measured flows. The head includes a thermistor responding to the tempera... | 06/24/1980 |
| 4193063 | Differential capacitance measuring circuit The displacement of the diaphragm in a differential pressure sensor of the differential capacitor type produces an output signal substantially linearly related to the displacement. The capacitors are charged in parallel from a constant current source for ... | 03/11/1980 |
| 4189367 | Method for testing ion selective electrodes in continuous measuring systems The membrane of an ion selective electrode is tested for damage while it is being used for continuous measurement by sending a test current through the electrode system and measuring the voltage change produced. If the voltage change does not reach the va... | 02/19/1980 |
| 4183245 | Synchronous frequency-to-voltage converter for doppler apparatus An ultrasonic Doppler flowmeter is provided with a frequency-to-voltage converter comprising a pair of interconnected filp-flops triggered by the Doppler frequency and a submultiple of the transmission frequency which produces a series of output pulses ha... | 01/15/1980 |
| 4179309 | Means for assembling expendable immersion thermocouples An expendable immersion thermocouple having a ceramic body member and a plastic tailpiece for supporting the thermocouple and producing a cavity into which a refractory cement is poured to secure the thermocouple in place. The tailpiece is provided with a... | 12/18/1979 |
| 4174618 | Decoupled cascade control system Control of the throttle pressure in a drum boiler-turbine system is accomplished by controlling the rate of fuel feed with a cascade control system. When fuel feed cannot be directly measured, but is computed from boiler output, the controllers in the sys... | 11/20/1979 |
| 4168220 | Method for detecting the fouling of a membrane covered electrochemical cell In a polarographic cell of the type which avoids depletion of the species being measured in the sample, the fouling of the membrane covering of the cell is detected by utilizing an electrode which can be substituted for that electrode from which the speci... | 09/18/1979 |
