Patents by Inventor David J. Griffiths

David J. Griffiths 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: 9998692
    Abstract: A process is provided for providing high contrast motion picture imagery. The camera system includes a physical architecture that enables multiple sensors to simultaneously acquire a visual scene without parallax or dissimilar exposures. The system architecture enables current off the shelf components to be used to develop the architecture or a specific sensor array to be developed. The architecture includes optical components that split an incident light ray into multiple beams of varying intensity. Each respective split light ray is then attenuated further with neutral density filters for the wavelengths to be observed before the light ray impacts the respective pixel sights. A process has been developed to use the camera system architecture to stochastically recombine the acquired energy and estimate what the original energy was before attenuation. The process involves the development of an optimal non recursive weighting function that can be used and constructed into a lookup table.
    Type: Grant
    Filed: June 24, 2016
    Date of Patent: June 12, 2018
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: David J. Griffiths
  • Patent number: 9054433
    Abstract: An electrical conduit ground assembly is provided for electrically and environmentally shielding an electric cable that inserts into a junction box via a through-hole. The assembly includes an adapter flange, first and second annular gaskets, first and second annular washers, a slip-ring, a ground adapter, first and second lock-nuts and a gland nut. The adapter flange has an internally threaded proximate end, an externally threaded mezzanine, a hexagonal seat, and an externally threaded distal end insertable into the through-hole. The first annular gasket inserts into the proximate end. The first and second washers insert into the proximate end. The annular ground adapter electrically connects the cable and the annular conduit between the first and second washers. The second annular gasket has an annular shaft and a circular brim. The gland nut screws into the proximate end of the adapter flange.
    Type: Grant
    Filed: April 28, 2014
    Date of Patent: June 9, 2015
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Blaise L. Corbett, David J. Griffiths
  • Publication number: 20140235077
    Abstract: An electrical conduit ground assembly is provided for electrically and environmentally shielding an electric cable that inserts into a junction box via a through-hole. The assembly includes an adapter flange, first and second annular gaskets, first and second annular washers, a slip-ring, a ground adapter, first and second lock-nuts and a gland nut. The adapter flange has an internally threaded proximate end, an externally threaded mezzanine, a hexagonal seat, and an externally threaded distal end insertable into the through-hole. The first annular gasket inserts into the proximate end and includes frustum and cylinder portions. The first annular washer inserts into the proximate end and disposal on the first gasket. The slip-ring inserts into the proximate end and disposal on the first washer. The second annular washer inserts into the proximate end and disposal on the slip-ring.
    Type: Application
    Filed: April 28, 2014
    Publication date: August 21, 2014
    Applicant: Chief of Naval Research, Office of Counsel
    Inventors: Blaise L. Corbett, David J. Griffiths
  • Patent number: 8747126
    Abstract: An adapter is provided for electrically connecting an interior surface of a conduit and an external surface of a cable. The adapter includes a flat strip extending longitudinally from first to second ends with first and second transverse edges and composed of an electrically conductive and mechanically flexible material. The strip includes a longitudinal ribbon that forms a ring for wrapping around the cable by curling the first and second ends together in a direction transverse to the sheet, and a plurality of first and second incisions from the transverse edges towards the ribbon, the incisions being disposed at respective intervals that correspond to a longitudinally regular pattern. The first incisions form tapering tabs for bending in the direction transverse to the sheet to produce petals that extend radially inward from the ring to engage the cable.
    Type: Grant
    Filed: October 10, 2013
    Date of Patent: June 10, 2014
    Assignee: The United States of America as Represented by the Secretary of the Navy
    Inventors: Blaise L. Corbett, David J. Griffiths
  • Publication number: 20140041938
    Abstract: An adapter is provided for electrically connecting an interior surface of a conduit and an external surface of a cable. The adapter includes a flat strip extending longitudinally from first to second ends with first and second transverse edges and composed of an electrically conductive and mechanically flexible material. The strip includes a longitudinal ribbon that forms a ring for wrapping around the cable by curling the first and second ends together in a direction transverse to the sheet, and a plurality of first and second incisions from the transverse edges towards the ribbon, the incisions being disposed at respective intervals that correspond to a longitudinally regular pattern. The first incisions form tapering tabs for bending in the direction transverse to the sheet to produce petals that extend radially inward from the ring to engage the cable.
    Type: Application
    Filed: October 10, 2013
    Publication date: February 13, 2014
    Applicant: United States Government, as represented by the Secretary of the Navy
    Inventors: Blaise L. Corbett, David J. Griffiths
  • Patent number: 8562361
    Abstract: An electrical conduit ground device is provided for electrically and environmentally shielding an electric cable. The device includes a conduit having a receiving end through which the cable passes axially; an internal seal that inserts into the receiving end; a gland boss that inserts into the receiving end; an external seal that inserts into the boss and extends axially outward from the receiving end; and a grounding assembly disposed between the internal and external seals. The assembly includes an adapter for providing electrical grounding contact between the cable and the swage tube; a space-retainer for structurally supporting the adapter; and a washer for axially separating the internal and external seals. The adapter is provided for electrically connecting an interior surface of a conduit and an external surface of a cable.
    Type: Grant
    Filed: January 26, 2012
    Date of Patent: October 22, 2013
    Assignee: The United States of America as Represented by the Secretary of the Navy
    Inventors: Blaise L. Corbett, David J. Griffiths
  • Patent number: 6734959
    Abstract: A prober for measuring the light output of digital devices integrally formed on a single wafer. The prober includes a light-integrating sphere sequentially aligned with selected devices. Each time that a device is aligned with the sphere, the device aligned with the sphere is activated, so that the light output of each device is individually measured. In the disclosed embodiment, the devices are vertical cavity surface emitting lasers (VCSELs) and light emitting diodes (LEDs).
    Type: Grant
    Filed: July 11, 2002
    Date of Patent: May 11, 2004
    Assignee: Labsphere, Inc.
    Inventors: David J. Griffiths, Jonathan D. Scheuch, Sean David Griffin, Ronald A. Murray, Kelly A. Edgar
  • Publication number: 20030020897
    Abstract: A prober for measuring the light output of digital devices integrally formed on a single wafer. The prober includes a light-integrating sphere sequentially aligned with selected devices. Each time that a device is aligned with the sphere, the device aligned with the sphere is activated, so that the light output of each device is individually measured. In the disclosed embodiment, the devices are vertical cavity surface emitting lasers (VCSELs) and light emitting diodes (LEDs).
    Type: Application
    Filed: July 11, 2002
    Publication date: January 30, 2003
    Inventors: David J. Griffiths, Jonathan D. Scheuch, Sean David Griffin, Ronald A. Murray, Kelly A. Edgar
  • Publication number: 20020094576
    Abstract: The present invention relates to a novel retrovirus associated with autoimmune disease. The present invention provides nucleotide and amino acid sequences relating to GAG, PRO and POL proteins of the retrovirus as well as diagnostic techniques and antibodies for use in diagnosis. The retrovirus (HRV-5) according to the present invention has been detected in inflamed joints (RA, osteoarthritis (OA), reactive arthritis and psoriatic arthritis) but not normal synovium. Further, HRV-5 proviral DNA has been detected in blood from patients with RA and systemic lupus erythematosus (SLE).
    Type: Application
    Filed: August 1, 2001
    Publication date: July 18, 2002
    Inventors: David J. Griffiths, Robert A. Weiss, Patrick Venables
  • Patent number: 5748485
    Abstract: A vending machine for vending computer software comprises, a bill acceptor for receiving money, an optical disk for storing a selection of programs to be vended, a hard disk drive for storing operating software, accounting information, and updates to the software vended, a diskette dispenser, and a disk drive all under control of a processor. The invention further comprises a device for indicating a program selection to the processor such that the processor may direct the writing of a customer-selected program to a diskette after money has been received.
    Type: Grant
    Filed: April 11, 1995
    Date of Patent: May 5, 1998
    Assignee: LaserVend, Inc.
    Inventors: Lars K. Christiansen, Mark H. Roberts, David J. Griffiths, Brent R. Adamson