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"I watched his countenance closely, to see if he was not deranged ... and I was assured by other senators after he left the room that they had no confidence in it."
U.S. Senator Smith of Indiana ; After seeing Samuel Morse demonstrate the telegraph.
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| Number | Title | Issue Date |
| 4906995 | Data compression apparatus and method for data recorder A data compression method and apparatus particularly suitable for use in electrical power line fault data recorders. The system performs both gain compression and frequency compression. For gain compression, a predetermined number of samples are analyzed ... | 03/06/1990 |
| 4879558 | Data compression apparatus and method for data recorder with waveform envelope display A data compression method and appartus particularly suitable for use in electrical power line fault data recorders. The system performs both gain compression and frequency compression. For gain compression, a predetermined number of samples are analyzed t... | 11/07/1989 |
| 4875783 | Temperature transducer for KYZ pulse recorder An improved temperature transducer for use with a KYZ pulse data recorder. A temperature sensor provides a temperature signal proportional to ambient temperature. An integrator circuit and comparator circuit responsive to the temperature signal provides p... | 10/24/1989 |
| 4847554 | Current measuring and magnetic core compensating apparatus and method DC magnetic flux bias imposed on a magnetic core of a current transformer is compensated in response to an indication of the amplitude and duration of opposite polarity secondary winding current components. In a second embodiment, the magnetic bias is com... | 07/11/1989 |
| 4827123 | Direction sensitive optical shaft encoder A direction sensitive optical shaft encoder includes an optical shutter disk mounted to a shaft for rotation therewith, the optical shutter disk bearing at least first and second radially concentric tracks having alternating light transmissive and light b... | 05/02/1989 |
| 4804938 | Distribution energy management system A bidirectional data communications distribution network is established between the system operations center (SOC) and customer terminals of a load management and electrical energy distribution system. The distribution network comprises independent proces... | 02/14/1989 |
| 4791362 | Modularized solid state register A modular meter assembly includes replaceable modules for a power supply, a register, a function controlling option circuit and a display of a measuring meter. The modules are provided with mechanical and electrical interconnectors, permitting for simplif... | 12/13/1988 |
| 4789837 | Switched capacitor mixer/multiplier A sequence of samples of a time varying signal is multiplied by respective, corresponding, multiplicands corresponding to values of a separate signal. The multiplicands are provided as ratios of capacitances switched into and out of a circuit between the ... | 12/06/1988 |
| 4713198 | High temperature plastic scintillators A plastic scintillator comprises a polymethylpentene thermoplastic material containing a fluorescent additive. This plastic scintillator material functions at high temperatures with excellent optical properties in the detection of neutrons. The plastic sc... | 12/15/1987 |
| 4710675 | Solid dynode structure for photomultiplier A photomultiplier includes a solid disk dynode and a pair of annular guiding electrodes disposed about the disk dynode transversely along the central axis of the photomultiplier tube on opposite sides of the dynode. The secondary and subsequent dynodes ma... | 12/01/1987 |
| 4698522 | Structure for Hall device for compensation of first and second order voltage offsets A Hall device is formed from a generally rectangular body of material exhibiting the Hall effect, with two excitation electrodes disposed along opposite edges of the device. Two Hall output voltage electrodes are disposed along one of the remaining edges ... | 10/06/1987 |
| 4697182 | Method of and system for accumulating verifiable energy demand data from remote electricity meters A solid state electricity demand recorder (10) is controlled by a programmable microprocessor (38) to obtain energy demand survey and billing data. The accumulated count of pulses during a record interval is compared with an encoded register reading obtai... | 09/29/1987 |
| 4697181 | System for accumulating verifiable energy demand data from remote electricity meters A solid state electricity demand recorder (10) is controlled by a programmable microprocessor (38) to obtain energy demand survey and billing data. The accumulated count of pulses during a record interval is compared with an encoded register reading obtai... | 09/29/1987 |
| 4697180 | System for accumulating verifiable energy demand data from remote electricity meters A solid state electricity demand recorder (10) is controlled by a programmable microprocessor (38) to obtain energy demand survey and billing data. The accumulated count of pulses during a record interval is compared with an encoded register reading obtai... | 09/29/1987 |
| 4695742 | Charge balance voltage-to-frequency converter utilizing CMOS circuitry A charge balance voltage-to-frequency converter utilizes CMOS circuitry to provide a digital pulse output proportional to an analog input signal. The converter approaches a desired charge balance by cycling between a charging and a discharging state. A cl... | 09/22/1987 |
| 4686460 | Solid state electricity meter display In a solid state electricity meter, a display consisting of a number of juxtaposed display elements provides, in a vector form, an indication of the direction and range of power flow in the line being measured. Circuitry for driving the vector display com... | 08/11/1987 |
| 4682169 | Method of and system for accumulating verifiable energy demand data from remote electricity meters A solid state electricity demand recorder (10) is controlled by a programmable microprocessor (38) to obtain energy demand survey and billing data. The accumulated count of pulses during a record interval is compared with an encoded register reading obtai... | 07/21/1987 |
| 4670737 | Method of initializing an optical encoder A method of initializing the position of an optical shaft encoder without having to precisely index the encoder with respect to its shaft. The optical encoder includes an optical shutter mounted for rotation with the shaft and light emitters and light det... | 06/02/1987 |
| 4665359 | Method and apparatus for detecting tampering with a meter having an encoded register display Tampering with an optically encoded meter display register or metering mechanism can be readily detected by comparing the quantity shown by the meter display with the encoded values of the optical encoders. A discrepancy is indicative of tampering with th... | 05/12/1987 |
| 4653076 | Timing signal correction system for use in direct sequence spread signal receiver A direct sequence spread spectrum transmitter and receiver can be synchronized when the timing reference frequency is less than or equal to the data sampling rate and the ratio of the data sampling rate to the timing reference is an integer by combining t... | 03/24/1987 |
| 4644523 | System for improving signal-to-noise ratio in a direct sequence spread spectrum signal receiver A plurality of transmitters synchronized to a common clock each transmit a data signal spread by a common bipolar pseudo-random code having a different assigned code sequence shift. A receiver, synchronized to the clock, discriminates the signal transmitt... | 02/17/1987 |
| 4639638 | Photomultiplier dynode coating materials and process The photosensitivity of a photomultiplier dynode to white light or infrared radiation is greatly reduced by coating the dynode with a layer of an alkali halide material having good secondary electron emission characteristics. A method of applying the coat... | 01/27/1987 |
| 4639728 | Method of and system for accumulating verifiable energy demand data from remote electricity meters Pulses generated by the pulse initiator of an electricity meter (30) are counted during successive measurement intervals. The pulse count for each interval is stored in the solid state memory (42) of a recorder (10), to be thereafter transmitted to a cent... | 01/27/1987 |
| 4631604 | Biasing for magnetic circuits A magnetic circuit, such as used in a magnetic recording head, or with a Hall-effect device, is biased by applying signals having noise-like properties to the magnetic circuit. Since the biasing signals will be effectively uncorrelated with other signals ... | 12/23/1986 |
| 4601047 | Code division multiplexer using direct sequence spread spectrum signal processing A plurality of transmitters synchronized to a common clock each transmit a data signal spread by a common bipolar pseudo-random code having a different predetermined assigned code sequence shift. A receiver, synchronized to the clock, discriminates the si... | 07/15/1986 |
| 4588982 | Optical shaft encoder An optical shaft encoder includes an optical shutter mounted to a shaft, the shutter bearing light transmissive and light reflective areas, at least a first light emitter and a first light detector arranged adjacent one another on one side of the optical ... | 05/13/1986 |
| 4588949 | Meter removal indicator Electricity meter fraud is detected by incorporating a unidirectional cyclometer-type register into a meter. The register is actuated each time the meter and cover assembly (which is factory sealed) is removed from its associated socket by an actuating ar... | 05/13/1986 |
| 4578213 | High temperature plastic scintillator A plastic scintillator comprises a polymethylpentene thermoplastic material containing a fluorescent additive. This plastic scintillator material functions at high temperatures with excellent optical properties in the detection of neutrons.... | 03/25/1986 |
| 4567588 | Synchronization system for use in direct sequence spread spectrum signal receiver A plurality of transmitters synchronized to a common clock each transmit a data signal spread by a common bipolar pseudo-random code having a different assigned code sequence shift. A receiver, synchronized to the clock, discriminates the signals transmit... | 01/28/1986 |
| 4561089 | Correlation detectors for use in direct sequence spread spectrum signal receiver A plurality of transmitters synchronized to a common clock each transmit a data signal spread by a common bipolar pseudo-random code having a different assigned code sequence shift. A receiver, synchronized to the clock, discriminates the signal transmitt... | 12/24/1985 |
| 4525669 | Power measurement in an electrical distribution system having three or more wires A system for measuring power in an electrical distribution circuit having at least three wires includes a Hall-effect generator directly coupled to one of the live wires of the circuit and current transformers coupled to the other live wires of the circui... | 06/25/1985 |
| 4522737 | Electrolytes for electrolytic capacitors An electrolyte for electrolytic capacitors comprises an alkyl glycol of 2 to 4 carbons; ammonium formate; and either a dicarboxylic acid of 2 to 8 carbons or its diammonium salt, wherein the ammonium ion is of the formula NH--(R)3 in which R is... | 06/11/1985 |
| 4521830 | Low leakage capacitor header and manufacturing method therefor A capacitor header having the mechanical characteristics of a modulus of elasticity in the range from 50,000 to 200,000 psi and a tensile strength in the range from 3,500 to 80,000 psi has pressure formed therein on the aluminum terminal of which portions... | 06/04/1985 |
| 4521761 | Small outline potentiometer A single-turn miniature potentiometer includes a first substrate having an annular conductive track formed thereon and a second substrate facing the first and having an annular resistive track formed thereon. An insulating layer is placed between the two ... | 06/04/1985 |
| 4509128 | Solid-state electrical-power demand register and method A solid-state demand register is described for determining the maximum electrical-power demand made on an electric utility by a load. The register, which employs a microprocessor, provides noncumulative, cumulative, and continuous-cumulative electrical-po... | 04/02/1985 |
| 4480286 | Capacitor case insulation and method of installation A power factor capacitor made with case to housing insulation of thin electrical grade polypropylene in multilayers to greatly exceed basic impulse level voltage test requirements.... | 10/30/1984 |
| 4458414 | Method of manufacturing a low leakage capacitor header A capacitor header having the mechanical characteristics of a modulus of elasticity in the range from 50,000 to 200,000 psi and a tensile strength in the range from 3,500 to 80,000 psi has pressure formed therein on the aluminum terminal of which portions... | 07/10/1984 |
| 4440271 | Viscous dampening arrangement for taut-band suspension An improved viscous dampening arrangement for a taut-band suspension system in an electrical indicating instrument includes a hub associated with the stator and a turret associated with the rotor. The hub and turret each have central openings for receivin... | 04/03/1984 |
| 4433387 | System for processing data received from a portable data store and for clearing the store System and apparatus for treating data derived in serial pulse fashion from a source such as a meter. Data words are recorded upon a magnetic bubble memory which is portable and which includes real time and identification data in addition to pulse source ... | 02/21/1984 |
| 4431966 | Modular backlighted analog/digital instrument display A modular backlighted analog/digital display for use in a cylindrical aircraft instrument housing. The analog indicator dial is backlighted by an illumination source diffused by a translucent light collecting plate having a configuration corresponding to ... | 02/14/1984 |
