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| Number | Title | Issue Date |
| 4285030 | Flashlight assembly A portable flashlight assembly utilizes a flat battery energy source containing slide contact electrodes. One embodiment includes the use of a film pack from a self-developing camera as an energy source.... | 08/18/1981 |
| 4263349 | Corrosion resistant coating Corrosion resistance is provided to metal substrates by the application of a hydrophobic resinous substance containing slightly alkaline particles in suspension. When applied to the metal substrate surface the cured resin provides a controlled diffusion b... | 04/21/1981 |
| 4259704 | Protective circuit for zinc oxide varistors The invention provides an improved circuit for determining rates of rise of energy in metal oxide varistor devices. A high voltage transformer is employed to trigger a protective air gap for bypassing the metal oxide varistor device. One application for t... | 03/31/1981 |
| 4258605 | Clarinet barrel with removable throat A clarinet barrel having fixed internal dimensions is provided with a plurality of throat members having a fixed outer dimension for insertion within the clarinet barrel. The inner dimensions of the individual throats are varied in order to provide varyin... | 03/31/1981 |
| 4254007 | Electrical insulating composition An electrically insulating wire coating material comprised of the heat cured product of a mixture of polyvinylacetal and phenol-aldehyde resins, or a mixture of these resins with epoxy resins, and a catalyst from the special metal containing group of cycl... | 03/03/1981 |
| 4254231 | High solids wire coating compositions for transformers The addition of a polyisocyanate to high solids wire coating compositions of the type consisting of a mixture of polyvinylacetal, phenol-aldehyde and epoxy resin systems improves the properties of the coated wire over a wide range of operating conditions.... | 03/03/1981 |
| 4254071 | Method of preparing electrostatic coating compositions containing an epoxy resin Insulating coating compositions for electrical wire are prepared by a method which includes a dehydration process to prevent any reaction from occurring between adsorbed moisture and the catalyst before the coating is electrostatically applied to the tran... | 03/03/1981 |
| 4250995 | Carrying case A carrying case for the accessories including reeds used with woodwind instruments. An insert is provided within the case and has a multiplicity of flat surfaces located longitudinally on its outside surface for holding reeds with an opening extending lon... | 02/17/1981 |
| 4243966 | Electrostatic shielding of nonsequential disc windings in transformers Transformer coils wound with disk winding sections nonsequentially arranged are provided with shields between the turns of mechanically adjacent sections to increase the series capacitance of the winding. The increased series capacitance of the winding al... | 01/06/1981 |
| 4219937 | Gauge for measuring internal diameters This invention relates to a gauge for measuring the internal diameter of a passage. The gauge comprises a tapered calibrated cone with an extendable rod member. The tapered cone is inserted within the passage and the rod is extended to contact the edge of... | 09/02/1980 |
| 4218719 | Reverse power flow detector and control circuit A solid state, reverse power flow detector and control circuit which samples the line voltage and current, once each cycle. The voltage sampling circuit includes a pulse generator providing a voltage pulse of short duration at a given time or phase angle ... | 08/19/1980 |
| 4199742 | Bubble deflector for vapor cooled transformers A bubble deflector for a vapor-cooled transformer comprises an insulating member, such as pressboard, which is placed under the upper yoke member of the transformer core to deflect vapor bubbles away from the bottom area of the upper yoke member of such c... | 04/22/1980 |
| 4199213 | Method of constructing an electrical connector switching module A connector module for loadbreak operation having an insulating housing and a switch insert. The insert includes a container with a major portion of uniform diameter and a configuration such that the diameter does not increase from its outer end to its in... | 04/22/1980 |
| 4198113 | Terminal member A self-locking and aligning terminal member for affixing electrical wires to a device such as a coil, comprising a smooth surfaced rod bent approximately 180° upon itself to provide a pair of generally parallel leg sections extending from the bend and wi... | 04/15/1980 |
| 4198595 | Apparatus and method of phase shift compensation of an active terminated current transformer Apparatus and method of compensating for a shift in the phase of the current applied to a current transformer terminated in a low impedance operational amplifier. The operational amplifier phase response is altered to minimize the phase angle between the ... | 04/15/1980 |
| 4188575 | Key operated meter access lock and reset mechanism A meter cover (housing) mounted mechanism incorporating a combination key operated tamper resistant security lock, externally controllable meter reset actuator and meter access hatch.... | 02/12/1980 |
| 4185722 | Magnetic clutch and brake assembly A positive acting magnetic clutch and brake assembly characterized by including a movable, magnetic member provided with two sets of detents arranged respectively on its opposing outer surfaces. The member is alternately shiftable into either a brake posi... | 01/29/1980 |
| 4179654 | Demand meter including means for selectively controlling the length of demand intervals In a power system, a time-of-day demand meter of the type having a programmable control circuit for generating a control signal at prescribed intervals to enable a demand logic circuit to control the engagement of a demand register of the meter includes a... | 12/18/1979 |
| 4178482 | Automatic gain control circuit and system for using same An automatic gain control circuit and system for using same provides linear attenuation response to input data signals of multiplexed frequencies of high and low signal amplitudes to eliminate frequency intermodulation products generated by the data signa... | 12/11/1979 |
| 4168461 | Voltage regulator providing wide range of voltage regulation A voltage regulator to provide a wide range of regulation, especially useful with process control. The regulator is provided with an extra bushing connected to the exciting winding of the regulator. By this means two or more regulators may be connected wi... | 09/18/1979 |
| 4166975 | Multiple rate electrical energy metering system and method An electronic time-of-day metering system is disclosed for measuring electrical power by at least two different mechanical recording devices depending on the time-of-day and time of week in which the electrical power is being consumed. A conventional kilo... | 09/04/1979 |
| 4164647 | Unidirectional register having different gear ratios for normal and reverse input drive rotation A unidirectional drive assembly for a mechanically driven meter register includes a gear shift operated gear ratio mechanism which allows a dial on the meter register to be driven up-scale at a normal rate with the forward direction of rotation of the met... | 08/14/1979 |
| 4161720 | Meter terminal unit for use in automatic remote meter reading and control system A meter terminal unit for use in automatic meter reading systems of the type including a control center for transmitting commands to and receiving measurement data from the terminal unit via a distribution unit serving several terminal units. The terminal... | 07/17/1979 |
| 4148135 | Method of treating metal oxide varistors to reduce power loss Metal oxide varistors having a uniform wattage gradient across the varistor surfaces are provided by removing a thin layer of metal oxide surface material from the periphery of the varistors prior to applying an insulating collar and a silicone rubber enc... | 04/10/1979 |
| 4138899 | Gear and boss protector A gear and boss protector for the spring driving mechanism of a tap selector such as a voltage regulator. A pair of hook cams form the protective means and they are mounted rotatably on the crank driven by the spring driving gear. One of the hook cams eng... | 02/13/1979 |
| 4138697 | Data recording system for indicating power outage on master and slave recorders A data recording system includes a master tape recorder interconnected to a plurality of slave recorders. Each recorder is adapted to record meter data provided thereto from a meter associated with each recorder. The master recorder includes a timing circ... | 02/06/1979 |
| 4135181 | Automatic remote meter reading and control system An automatic meter reading and control system for communicating with remote terminal points includes a central station which selectively communicates with a transponder controller unit at each terminal point via a plurality of distribution units, each ser... | 01/16/1979 |
| 4130750 | Machine for welding aluminum to aluminum A method of welding aluminum to aluminum by thermal resistance welding, providing good electrical and mechanical characteristics. The method uses special electrodes for thermal heat that are hard and have a high electrical resistance, such as molybdenum o... | 12/19/1978 |
| 4121271 | Reverse power flow detector and control circuit A solid state, reverse power flow detector and control circuit which samples the line voltage and current, once each cycle. The voltage sampling circuit includes a pulse generator providing a voltage pulse of short duration at a given time or phase angle ... | 10/17/1978 |
| 4070978 | Floating apparatus for weeding and dredging waterways A floating apparatus including a barge having a plurality of hydraulically actuated stabilizers for positioning the barge at a location. An hydraulically actuated, articulated boom is rotatably mounted on the barge and provided with any of a plurality of ... | 01/31/1978 |
| 4067636 | Electrical separable connector with stress-graded interface A rod connector module of the type comprising an insulating housing containing a contact rod support, a receiving cone in the housing extending from the exterior toward the support, and a conductive contact rod fixed at one end to the support and extendin... | 01/10/1978 |
| 4046847 | Process for improving the stability of sintered zinc oxide varistors A process for making overvoltage surge protection varistors of the zinc oxide type includes the steps of: A. sintering a varistor body at an elevated temperature of at least about 1100° C; then B. cooling the body to a temperature below about 400° C; then C.... | 09/06/1977 |
| 4044326 | Hermetic seal between telescoping cylinders of a fuse housing The end caps of an electric current limiting fuse are telescopingly fitted inside the end portion of a housing tube and sealed to the inside wall in at least two spaced-apart locations to isolate an annular space between the outside cylindrical cap surfac... | 08/23/1977 |
| 4042900 | Electrostatic shielding of disc windings An electrostatic shielding arrangement for improving the initial distribution of voltage which in turn reduces the insulation stresses on disc-wound coils resulting from the application of impulse or steep wave-front voltages to such coils. Floating elect... | 08/16/1977 |
| 4028655 | Electrical current limiting fuse with bound sand filler and improved low current fault clearing A high voltage current limiting fuse of the type including a bound silica sand filler has a fusible element provided with evenly spaced perforations along its major length. In the region of the center of the fuse, a segment of the element is provided with... | 06/07/1977 |
| 4024486 | Outer locking turn for precut core A precut nested magnetic core having a locking outer turn. The locking turn is formed of magnetic core steel and has a pair of locking slots in one end and a single locking tab in the opposite end. The precut annular core is locked by using the second or ... | 05/17/1977 |
| 4009417 | Electrical apparatus with heat pipe cooling An electrical apparatus, such as a distribution transformer, having heat pipe cooling. The transformer is provided with a cover in the form of a heat pipe with an evaporator section extending from the cover into the dielectric fluid of the transformer. Th... | 02/22/1977 |
| 4009141 | Electrical insulating compositions of epoxy resins, zirconium silicate and alumina Composition for use in making electrical insulating products such as transformer bushings comprises a mixture of cycloaliphatic epoxy resin, an anhydride curing agent, and a filler material including zirconium silicate and hydrated alumina. To provide for... | 02/22/1977 |
| 4009418 | Attachment of heat pipes to electrical apparatus An electrical apparatus, such as a distribution transformer, provided with heat pipes for cooling. The apparatus is provided with attachment wells, either extending into the cooling fluid of the apparatus or secured along the outside wall of the apparatus... | 02/22/1977 |
| 4003653 | Method of producing color slides from black and white originals In the method of producing color slides from black and white originals, a light box, a glass plate and a camera are used. Also utilized is a positive and negative of a black and white original. In the first step, a film frame in the camera is exposed to t... | 01/18/1977 |
