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 |
| 7706980 | Blowout preventer testing system and method A method and apparatus for testing a blowout preventer (BOP) wherein a pressurization unit applies fluid to an isolated portion of the throughbore of the BOP. A signal that is representative of the actual pressure in the isolated portion of the throughbore over succ... | 04/27/2010 |
| 7525873 | Seismic inversion of conditioned amplitude spectra According to a preferred aspect of the instant invention, there is provided herein a system and method for using both a temporal zone of seismic data and conditioned amplitude spectra thereof to determine the underlying layer sequence. The instant invention is suita... | 04/28/2009 |
| 7502690 | System and method for using time-distance characteristics in acquisition, processing, and imaging of t-CSEM data There is provided herein a system and method of acquiring, processing, and imaging transient Controlled Source ElectroMagnetic (t-CSEM) data in ways that are similar to those used for seismic data. In particular, the instant invention exploits the time-distance char... | 03/10/2009 |
| 7401654 | Blowout preventer testing system A method and apparatus is disclosed for testing a blowout preventer (BOP) by: using a drillpipe to install a test plug into one end of the throughbore of a (BOP); using a valve in the BOP to isolate the opposite end of the throughbore of the BOP, using piping to con... | 07/22/2008 |
| 7391673 | Method of wide azimuth seismic acquisition According to a preferred aspect of the instant invention, there is provided a system and method for acquiring seismic data in a marine environment, wherein at least two source vessels are used in conjunction with a recording vessel which tows a plurality of hydropho... | 06/24/2008 |
| 7333916 | Performance monitor for a photovoltaic supply A method and apparatus is disclosed for monitoring the performance of a solar powered electrical supply where the supply comprises an array of photovoltaic cells that are mounted on a building. In one embodiment, the apparatus comprises: a device for producing a sig... | 02/19/2008 |
| 7104329 | Marine bottomed tensioned riser and method A new marine oil production riser system for use in deepwater applications is disclosed. An efficient means for accommodating movements of the host facility, while maintaining riser top tension within the limits for long-term riser performance. Long riser stroke len... | 09/12/2006 |
| 6975560 | Geophysical method and apparatus A method and apparatus is disclosed for performing a seismic survey below the surface of a body of water and on the seabed. In one embodiment, a plurality of seismic data receivers are removably loaded in a carrier located above the surface of the water and the carr... | 12/13/2005 |
| 6944094 | High resolution determination of seismic polar anisotropy A method and apparatus for high-resolution measurement of seismic anisotropy, comprising: a recording system, a borehole having an axis that is deviated from the vertical by a known acute angle; a housing that is adapted to travel within the borehole and that is in ... | 09/13/2005 |
| 6729394 | Method of producing a communicating horizontal well network A method of producing fluids from a subterranean formation through a single well in a network of separate well-bores, comprising the steps of: forming a well having a horizontal section located within the formation; completing and equipping such well to produce flui... | 05/04/2004 |
| 6150822 | Sensor in bit for measuring formation properties while drilling Earth formation evaluation for detection of hydrocarbon fluids is carried out by a microwave frequency range sensor (antenna or wave guide) disposed in the face of a diamond or PDC drill bit configured to minimize invasion of drilling fluid into the forma... | 11/21/2000 |
| 6128580 | Converted-wave processing in many-layered anisotropic media The instant invention provides a method for processing converted-wave data into interpretable images using a compact two-parameter model. The method broadly comprises the steps of: collecting both P-wave and converted-wave seismic data; identifying the ar... | 10/03/2000 |
| 5726615 | Integrated-magnetic apparatus Disclosure is made of an integrated-magnetic apparatus, comprising: winding structure for insulatingly carrying at least two generally flat, laterally offset and spaced apart electrical windings of a power converter around an aperture; a core having a fla... | 03/10/1998 |
| 4867129 | Machined archer's rest An archer's rest comprising a base member having an axial bore, a compressive spring located within the bore, a plunger slidingly captured in the bore to have one end positioned against the spring and a free end, a screw for adjusting the force exerted by... | 09/19/1989 |
| 4550682 | Micro crane finishing line system A material finishing line including a essentially linear array of work stations is disclosed. A stationary support beam extends over the work stations and substatially encloses a transmission, and supports at least one crane body and a drive means to sele... | 11/05/1985 |
| 4542551 | Rotary floor maintenance device A rotary floor maintenance device having, a motor support base with at least one central aperture, an electric motor having a shaft perpendicular to the motor base through the aperture, and a motor adapter directly coupled to the motor shaft for rotation ... | 09/24/1985 |
| 4533798 | Current transfer shunt arrangement A high-current shunt is disclosed for carrying current between relatively fixed and movable terminals in a mechanism for controlling the transfer of electrical energy. In one embodiment a plurality of generally oval, flexible, ribbon-like electrical condu... | 08/06/1985 |
| 4533863 | Voltage regulator A voltage regulator is described adapted for use controlling the output of an AC generator. A voltage control field-winding excitation control circuit supplies direct current to the generator field in response to a driver. The driver, in turn, is operated... | 08/06/1985 |
| 4532471 | Power theft detection circuit The power theft detector circuit (10, 110 and 210) detects when current is being diverted around a line conductor (20 or 220) passing through a meter housing (14 or 214). The circuit (10, 110 or 210) includes a current transformer (12, 112 or 212) coupled... | 07/30/1985 |
| 4528966 | Propane fuel system A liquid propane gas fuel system includes a propane fuel tank. A two stage pressure regulator defined by a housing with a fuel inlet and a fuel outlet is also included. A first fuel conduit extends from an outlet in the fuel tank to the fuel inlet in the ... | 07/16/1985 |
| 4517542 | Voltage and temperature compensated time delay relay A temperature and voltage compensated time delay relay includes first and second bimetallic, contact carrying elements chosen to deflect in a similar manner in accordance with variations in ambient temperature for maintaining the contact gap therebetween ... | 05/14/1985 |
| 4517425 | Self-flow generating gas interrupter A unique self-flow generating gas interrupter of the type wherein arc-extinction is performed by the creation of a negative pressure region brought about by the separation of the interrupter contacts. The interrupter incorporates a novel arrangement of va... | 05/14/1985 |
| 4514606 | Disconnect switch assembly A disconnect switch is disclosed having a puffer interrupter electrically connected with and operated by a knife switch or fused disconnect switch. A puffer interrupter includes a divided pressure chamber having at least one exterior wall which is flexibl... | 04/30/1985 |
| 4511876 | Electrical fuse with response indicator An elongated fuse housing includes a fusible wire longitudinally extended and coaxially mounted within a housing having end terminals. A spring indicator unit is secured to one end and includes a relatively large diameter loosely wound section forming a h... | 04/16/1985 |
| 4508315 | Bidirectional valve seal A valve seal for a butterfly valve comprises a U-shaped annular seating member disposed in an annular slot in the valve body and a retaining ring for holding the seating member in place. The seating member cross-section comprises two legs and a bight port... | 04/02/1985 |
| 4506405 | Floor treating machine A floor treating machine adapted to operate as a floor scrubber and a floor polisher or buffer includes a main housing or support frame structure from which extends a brush housing assembly. The main housing contains a combined solution and recovery tank,... | 03/26/1985 |
| 4505188 | Pneumatic actuator A pneumatic positioner with a casing composed of a shell-like bottom part and a shell-like cover part. A membrane plate, is connected through a gas-tight membrane with the side walls of the casing so as to be movable back and forth in the casing in the di... | 03/19/1985 |
| 4504813 | Energy saving wound core transformer A wound core transformer is described which features low core losses by the addition of magnetic material in those sides of the wound core which are located outside of the coil. In one embodiment the wound core includes: a base-core is formed from two str... | 03/12/1985 |
| 4500096 | Turbine shaft seal assembly A three part split shaft seal assembly is disclosed which is particularly adapted for use in an overhung steam turbine. In one embodiment the assembly is located between the shaft opening of the turbine case and a horizontally split shaft bearing case. To... | 02/19/1985 |
| 4492208 | Liquid propane gas fuel system A liquid propane gas fuel system includes a propane fuel tank. A two stage pressure regulator defined by a housing with a fuel inlet and a fuel outlet is also included. A first fuel conduit extends from an outlet in the fuel tank to the fuel inlet in the ... | 01/08/1985 |
| 4492246 | Solid state current-to-pressure and current-to-motion transducer A transducer for converting an electrical current signal to a pneumatic pressure. A solid state element such as piezo-electric flapper element 48 is used to vary the pressure drop through a nozzle 46 to provide a controlled pressure supply 28. A micro-pow... | 01/08/1985 |
| 4490638 | Salient pole rotor with amortisseur winding A unique design and construction is presented for the rotor of a dynamoelectric machine. The rotor is comprised of two end plates, bar means for holding the end plates together, a stack of pole laminations, electrical conductors wrapped about the laminati... | 12/25/1984 |
| 4489384 | Electro-optical sensor for watt-hour meter The electronic watt-hour meter (10) comprises an electro-optical watt-hour sensor (12) adapted to be coupled to a consumer's connection to a source of electric power for sensing voltage supplied to, and the current drawn by, the consumer's electric load a... | 12/18/1984 |
| 4489226 | Distribution class puffer interrupter An interrupter is provided having: an outer enclosure or tank adapted to contain an arc-extinguishing fluid; a fixed tubular electrical current carrying member disposed at one end of the tank; a movable tubular current carrying member disposed in the tank... | 12/18/1984 |
| 4486005 | Side rod tensioning device for preventing misalignment and distortion during assembly of the plunger drive mechanism in a reciprocating pump A tensioning device for prestressing the rod members and transverse members connected thereto and operatively associated therewith has a jack assembly connected between at least two rod members and disposed to engage the transverse member, the jack assemb... | 12/04/1984 |
| 4475843 | Apparatus for clamping cables An apparatus for clamping a pair of cables includes a clamp body of a clam shell configuration. The body includes first and second legs joined by an integral hinge. The clamp body and hinge are fabricated of a deformable material. First and second diagona... | 10/09/1984 |
| 4469123 | Cold box valve A cold box valve, employed in cryogenic environments, includes a valve body assembly with a fluid inlet and a fluid outlet. The valve body assembly includes a valve body and bonnet. The bonnet seals the top of the valve body to which access to the valve i... | 09/04/1984 |
| 4467434 | Solid state watt-hour meter A watt-hour meter is disclosed which includes: a microprocessor coupled to a solid-state Hall-Effect sensor; an electrically alterable ROM coupled to the microprocessor; a power supply; a power outage timing means using the discharge characteristic of a c... | 08/21/1984 |
| 4465910 | Self-generating gas flow interrupter An electrical circuit interrupter is disclosed having the characteristic of a puffer interrupter and a self-extinguishing gas flow interrupter. The interrupter comprises a generally hollow movable cylinder which is adapted to be filled with an arc extingu... | 08/14/1984 |
| 4464583 | Apparatus for bonding and protecting electrical cable shields An apparatus is provided for single-point, multi-point or cross-bonding electrical power cables. The apparatus includes an electrically insulated housing which defines an access well, two electrical conductors each having one end disposed within the well,... | 08/07/1984 |
