Patents by Inventor David M. Adams

David M. Adams has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 8692672
    Abstract: An integrated charger and alarm unit. A plurality of alarm receptacles are in a housing, each for selectively receiving a sensor cord for sensing security status of one of a plurality of chargeable devices. A plurality of charging receptacles are in the housing, one for each alarm receptacle, each for selectively receiving a power cord for charging one of the chargeable devices. A power receptacle in the housing connects to an electrical power source. An electrical circuit is operatively connected to the alarm receptacles, the charging receptacles and the power receptacle. The electrical circuit comprises an alarm control powered by the electrical power source and connected to the alarm receptacles and generating an alarm signal if the security status of any of the plurality of chargeable devices is in an unsecured status. A power supply control regulates power from the electrical power source to each of the charging receptacles.
    Type: Grant
    Filed: May 9, 2013
    Date of Patent: April 8, 2014
    Assignee: Se-Kure Controls, Inc.
    Inventors: Roger J. Leyden, David M. Adams
  • Patent number: 8692671
    Abstract: An integrated charger and alarm unit. A plurality of alarm receptacles are in a housing, each for selectively receiving a sensor cord for sensing security status of one of a plurality of chargeable devices. A plurality of charging receptacles are in the housing, one for each alarm receptacle, each for selectively receiving a power cord for charging one of the chargeable devices. A power receptacle in the housing connects to an electrical power source. An electrical circuit is operatively connected to the alarm receptacles, the charging receptacles and the power receptacle. The electrical circuit comprises an alarm control powered by the electrical power source and connected to the alarm receptacles and generating an alarm signal if the security status of any of the plurality of chargeable devices is in an unsecured status. A power supply control regulates power from the electrical power source to each of the charging receptacles.
    Type: Grant
    Filed: August 3, 2012
    Date of Patent: April 8, 2014
    Assignee: Se-Kure Controls, Inc.
    Inventors: Roger J. Leyden, David M. Adams
  • Publication number: 20140035539
    Abstract: An integrated charger and alarm unit. A plurality of alarm receptacles are in a housing, each for selectively receiving a sensor cord for sensing security status of one of a plurality of chargeable devices. A plurality of charging receptacles are in the housing, one for each alarm receptacle, each for selectively receiving a power cord for charging one of the chargeable devices. A power receptacle in the housing connects to an electrical power source. An electrical circuit is operatively connected to the alarm receptacles, the charging receptacles and the power receptacle. The electrical circuit comprises an alarm control powered by the electrical power source and connected to the alarm receptacles and generating an alarm signal if the security status of any of the plurality of chargeable devices is in an unsecured status. A power supply control regulates power from the electrical power source to each of the charging receptacles.
    Type: Application
    Filed: May 9, 2013
    Publication date: February 6, 2014
    Applicant: Se-Kure Controls, Inc.
    Inventors: Roger J. Leyden, David M. Adams
  • Publication number: 20140035746
    Abstract: An integrated charger and alarm unit. A plurality of alarm receptacles are in a housing, each for selectively receiving a sensor cord for sensing security status of one of a plurality of chargeable devices. A plurality of charging receptacles are in the housing, one for each alarm receptacle, each for selectively receiving a power cord for charging one of the chargeable devices. A power receptacle in the housing connects to an electrical power source. An electrical circuit is operatively connected to the alarm receptacles, the charging receptacles and the power receptacle. The electrical circuit comprises an alarm control powered by the electrical power source and connected to the alarm receptacles and generating an alarm signal if the security status of any of the plurality of chargeable devices is in an unsecured status. A power supply control regulates power from the electrical power source to each of the charging receptacles.
    Type: Application
    Filed: August 3, 2012
    Publication date: February 6, 2014
    Inventors: Roger J. Leyden, David M. Adams
  • Publication number: 20130048282
    Abstract: A method of treating a subterranean formation may include placing a first treatment fluid into a subterranean formation through an access conduit connecting the subterranean formation to a wellbore at a pressure sufficient to form at least a portion of a fracture network; pumping a second treatment fluid comprising a propping agent into the fracture network such that the propping agent forms a proppant pack in at least a portion of the fracture network; placing a third treatment fluid comprising a secondary diverting agent into the fracture network so as to substantially inhibit fluid flow through at least a portion of the fracture network without substantially inhibiting fluid flow through the access conduit; and placing a fourth treatment fluid comprising a primary diverting agent into the wellbore such that the primary diverting agent substantially inhibits fluid flow through the access conduit.
    Type: Application
    Filed: August 23, 2011
    Publication date: February 28, 2013
    Inventors: David M. Adams, Stephen R. Ingram, Nicholas Gardiner, Walt F. Glover, Mark Harris, Matt Oehler, Jonathan Smith
  • Patent number: 7766083
    Abstract: The present invention is directed to a method of isolating hydrajet stimulated zones from subsequent well operations. The method includes the step of drilling a wellbore into the subterranean formation of interest. Next, the wellbore may or may not be cased depending upon a number of factors including the nature and structure of the subterranean formation. Next, the casing, if one is installed, and wellbore are perforated using a high pressure fluid being ejected from a hydrajetting tool. A first zone of the subterranean formation is then fractured and stimulated. Next, the first zone is temporarily plugged or partially sealed by installing an isolation fluid into the wellbore adjacent to the one or more fractures and/or in the openings thereof, so that subsequent zones can be fractured and additional well operations can be performed.
    Type: Grant
    Filed: April 24, 2007
    Date of Patent: August 3, 2010
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Ronald M. Willett, Jim B. Surjaatmadja, Billy W. McDaniel, Leldon Mark Farabee, David M. Adams, Lloyd E. East
  • Patent number: 7661160
    Abstract: A beach blanket that remains in an unfolded position while on a flat surface. The beach blanket has a pair of incorporated polyvinyl chloride (PVC) straps to provide internal, structural strength when the beach blanket is in an extended position. Also, the beach blanket has at least one internal wire loop that provides extra structural support when the beach blanket is open.
    Type: Grant
    Filed: February 5, 2009
    Date of Patent: February 16, 2010
    Inventor: David M. Adams
  • Patent number: 7225869
    Abstract: The present invention is directed to a method of isolating hydrajet stimulated zones from subsequent well operations. The method includes the step of drilling a wellbore into the subterranean formation of interest. Next, the wellbore may or may not be cased depending upon a number of factors including the nature and structure of the subterranean formation. Next, the casing, if one is installed, and wellbore are perforated using a high pressure fluid being ejected from a hydrajetting tool. A first zone of the subterranean formation is then fractured and stimulated. Next, the first zone is temporarily plugged or partially sealed by installing an isolation fluid into the wellbore adjacent to the one or more fractures and/or in the openings thereof, so that subsequent zones can be fractured and additional well operations can be performed.
    Type: Grant
    Filed: March 24, 2004
    Date of Patent: June 5, 2007
    Assignee: Halliburton Energy Services, Inc.
    Inventors: Ronald M. Willett, Jim B. Surjaatmadja, Billy W. McDaniel, Leldon Mark Farabee, David M. Adams, Loyd E. East
  • Patent number: 7035305
    Abstract: An optical device, including a monolithically integrated diode laser and semiconductor optical amplifier, that has reduced linewidth and improved side mode suppression for a given output power target. In a preferred embodiment, the diode laser is detuned from a gain peak wavelength to an emission wavelength. The semiconductor optical amplifier has an active region that is bandgap shifted to move its gain peak towards the emission wavelength of the laser diode, thus reducing its linewidth enhancement factor. The diode laser is preferably either a gain-coupled or index-coupled distributed feedback laser. The bandgap shift can be effected by known bandgap shifting methods, such as ion implantation, dielectric cap disordering, and laser induced disordering.
    Type: Grant
    Filed: May 10, 2002
    Date of Patent: April 25, 2006
    Assignee: Bookham Technology, plc
    Inventors: David M. Adams, Joan E Haysom, Ian Woods
  • Patent number: 6970484
    Abstract: A tunable laser and laser tuning method, based on the interaction of a spectrally dependent beam distortion and a spatial filter within a laser cavity. One embodiment of this laser is an external cavity semiconductor laser in which broad tunability is obtained by the insertion of an acousto-optic tunable filter (AOTF) into the laser cavity such that the intra-cavity laser beam passes through the AOTF in zeroth order.
    Type: Grant
    Filed: April 13, 2005
    Date of Patent: November 29, 2005
    Assignee: Picarro, Inc.
    Inventors: Barbara Paldus, Jinchun Xie, Robert Lodenkamper, David M. Adams, Eric Crosson, Alexander Katchanov, Grzegorz Pakulski, Chris W. Rella, Bruce A. Richman
  • Patent number: 6959024
    Abstract: A laser tuning mechanism which embodies “spectrally dependent spatial filtering” (SDSF) and contemplates two key elements of the tuning mechanism. The first element of the SDSF tuning mechanism is a spectrally dependent beam distortion (i.e. alteration of the amplitude and/or phase profile of the beam) provided by an SDSF tuning element in a laser cavity. The second element of the SDSF tuning mechanism is an intracavity spatial filter which makes the round trip cavity loss a sensitive function of both beam distortion and cavity alignment. Such a laser can be aligned so that a specific beam distortion, which is provided by the SDSF tuning element at a tunable wavelength, is required to obtain minimum round trip cavity loss, thereby providing tunable laser emission. A preferred embodiment of the SDSF tuning mechanism is an external cavity semiconductor laser having a zeroth order acousto-optic tuning element.
    Type: Grant
    Filed: December 2, 2002
    Date of Patent: October 25, 2005
    Assignee: Picarro, Inc.
    Inventors: Barbara Paldus, Jinchun Xie, Robert Lodenkamper, David M. Adams, Eric Crosson, Alexander Katchanov, Grzegorz Pakulski, Chris W. Rella, Bruce A. Richman, Serguei Koulikov
  • Patent number: 6678183
    Abstract: A power supply with DC surge and spike protection having additional, optional power conditioning and control functions such as low voltage protection, electro mechanical interferences(EMI) protection and radio frequency interference(RFI) protection. The device is for attachment to vehicular electrical systems for protecting, conditioning or controlling the input power to electrical devices such as computers, audio and video systems, PDA's, wireless phones, and other electronic products. The power supply includes a housing having a male cigarette lighter plug inserted into a vehicular cigarette lighter plug or DC power outlet, electrical circuitry in the housing and one or more female power receptacles into which the powered electrical devices DC connectors are inserted.
    Type: Grant
    Filed: March 20, 2002
    Date of Patent: January 13, 2004
    Assignee: SAFCO Corporation
    Inventors: Bruce E. Creger, David M. Adams
  • Publication number: 20030210723
    Abstract: An optical device, including a monolithically integrated diode laser and semiconductor optical amplifier, that has reduced linewidth and improved side mode suppression for a given output power target. In a preferred embodiment, the diode laser is detuned from a gain peak wavelength to an emission wavelength. The semiconductor optical amplifier has an active region that is bandgap shifted to move its gain peak towards the emission wavelength of the laser diode, thus reducing its linewidth enhancement factor. The diode laser is preferably either a gain-coupled or index-coupled distributed feedback laser. The bandgap shift can be effected by known bandgap shifting methods, such as ion implantation, dielectric cap disordering, and laser induced disordering.
    Type: Application
    Filed: May 10, 2002
    Publication date: November 13, 2003
    Inventors: David M. Adams, Joan E. Haysom, Ian Woods
  • Publication number: 20030179597
    Abstract: A power supply with DC surge and spike protection having additional, optional power conditioning and control functions such as low voltage protection, electro mechanical interferences(EMI) protection and radio frequency interference(RFI) protection. The device is for attachment to vehicular electrical systems for protecting, conditioning or controlling the input power to electrical devices such as computers, audio and video systems, PDA's, wireless phones, and other electronic products.
    Type: Application
    Filed: March 20, 2002
    Publication date: September 25, 2003
    Applicant: SAFCO Corporation
    Inventors: Bruce E. Creger, David M. Adams
  • Publication number: 20030161361
    Abstract: A laser tuning mechanism which embodies “spectrally dependent spatial filtering” (SDSF) and contemplates two key elements of the tuning mechanism. The first element of the SDSF tuning mechanism is a spectrally dependent beam distortion (i.e. alteration of the amplitude and/or phase profile of the beam) provided by an SDSF tuning element in a laser cavity. The second element of the SDSF tuning mechanism is an intracavity spatial filter which makes the round trip cavity loss a sensitive function of both beam distortion and cavity alignment. Such a laser can be aligned so that a specific beam distortion, which is provided by the SDSF tuning element at a tunable wavelength, is required to obtain minimum round trip cavity loss, thereby providing tunable laser emission. A preferred embodiment of the SDSF tuning mechanism is an external cavity semiconductor laser having a zeroth order acousto-optic tuning element.
    Type: Application
    Filed: December 2, 2002
    Publication date: August 28, 2003
    Inventors: Barbara Paldus, Jinchun Xie, Robert Lodenkamper, David M. Adams, Eric Crosson, Alexander Katchanov, Grzegorz Pakulski, Chris W. Rella, Bruce A. Richman, Serguei Koulikov
  • Patent number: 6528238
    Abstract: Groove patterns on substrates coated with photoresist are made using the technique of photolithography by exposing photoresist via a reticle. In the instant invention, the pattern is provided on the reticle with a period larger than the final period to be printed on the photoresist. The complete pattern is obtained by subjecting the photoresist to two or more exposures and aligning the substrate relative to the reticle between exposures. In a further embodiment the slits on the reticle defining the line width of the grooves are larger than required and photoresist is subjected to multiple partial exposure. Both embodiments significantly reduce diffraction caused by the reticle and improve the resolution of the technique.
    Type: Grant
    Filed: September 22, 2000
    Date of Patent: March 4, 2003
    Inventors: David Seniuk, Paul J. Paddon, David M. Adams
  • Patent number: 6151347
    Abstract: A semiconductor laser device structure comprising an active region provided by a quantum well of an indirect bandgap material, the quantum well being divided laterally to form an active region comprising a two dimensional array of localized cells. Preferably the quantum well of indirect band gap material is selected from group IV semiconductor materials and comprises a silicon-germanium alloy. A silicon/silicon-germanium alloy multi-quantum well (MQW) structure is described. In a preferred embodiment, a Si/SiGe alloy MQW laser diode comprises a coplanar double grating configuration etched through the MQW structure to provide distributed feedback. The double intersecting grating structure functions to define an array of "cells" or regions of finite dimensions in the quantum well structure which "localize" carriers within the cells thereby enhancing the radiative emission probability. The grating also provides for combined gain-coupled and index-coupled distributed feedback.
    Type: Grant
    Filed: June 9, 1998
    Date of Patent: November 21, 2000
    Assignee: Nortel Networks Corporation
    Inventors: Jean-Paul F. Noel, David M. Adams
  • Patent number: 5578979
    Abstract: An improved electromagnetic apparatus includes a core and an armature which is movable relative to the core. A shading ring is connected with the core to provide magnetic flux which is out of phase with magnetic flux from the core. The shading ring includes a base formed a first metal and a layer of a second metal clad to the base. The first metal forming the base work hardens and has a greater resistance to fatigue failure induced by vibration than the second metal of the layer which is clad to the base. However, the second metal forming the clad layer has a greater electrical conductivity than the first metal of the base. The base may be formed of aluminum and the layer of metal clad to the base may be formed of copper. The layer of copper may be clad to the base by an extrusion process.
    Type: Grant
    Filed: January 6, 1993
    Date of Patent: November 26, 1996
    Assignee: Eaton Corporation
    Inventors: David M. Adams, Jerome K. Hastings
  • Patent number: 5483547
    Abstract: A Type II heterojunction formed of semiconductor material which normally forms a Type I heterojunction. The Type II heterojunction is created by using a carefully chosen stack of epitaxial semiconductor materials with modifications to the band structure through quantum mechanical confinement effects. This virtual type II heterojunction is incorporated adjacent to the active region in a single-quantum-well, ridge-waveguide laser structure. An anomalous "Negative-T.sub.o " region is observed in which threshold current decreases with increasing temperature. A reduction in the temperature sensitivity of the threshold current of the laser structure results.
    Type: Grant
    Filed: May 10, 1994
    Date of Patent: January 9, 1996
    Assignee: Northern Telecom Limited
    Inventors: David M. Adams, Toshihiko Makino, George K. D. Chik
  • Patent number: 5345459
    Abstract: A method of reducing thermally-induced emission wavelength shift in laser diodes. In addition to the conventional ridge contact for supplying the modulation current to the laser diode a second ridge contact is formed on the device. A compensation current of substantially the same frequency as the modulation current but having an opposite phase is applied to the second contact. This compensation current is selected to substantially neutralize the transient temperature variations due to changes in the modulation signal and result in a generally steady state thermal situation.
    Type: Grant
    Filed: September 9, 1993
    Date of Patent: September 6, 1994
    Assignee: Northern Telecom Limited
    Inventors: Bruce A. Richardson, Douglas J. S. Beckett, Jozef Finak, Robert A. Bruce, David M. Adams