Patents Assigned to The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
  • Patent number: 5821556
    Abstract: A superconductive junction (10) comprises a first track (22) of YBa.sub.2 Cu.sub.3 O.sub.7 surmounted by a second track (28) also of YBa.sub.2 Cu.sub.3 O.sub.7. An interconnect (26) in the form of a superconductive mesa electrically connects the first track to the second track and acts as a microbridge. When cooled below a critical temperature, the junction (10) shows Josephson-like behaviour. A non-superconductive layer (24) of PrBa.sub.2 Cu.sub.3 O.sub.7 separates the first track and the second track, with the interconnect extending through the PrBa.sub.2 Cu.sub.3 O.sub.7 layer in the form of an island. The junction (10) is fabricated by electron beam evaporation, optical lithography, and ion beam milling.
    Type: Grant
    Filed: September 23, 1996
    Date of Patent: October 13, 1998
    Assignee: The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
    Inventors: Nigel Gordon Chew, Simon Wray Goodyear, Richard George Humphreys, Julian Simon Satchell
  • Patent number: 5817583
    Abstract: Textile materials having radar attenuating properties based upon a polymer enclosed scrim having hollows which are at least partially filled with radar attenuating material. The scrim is sandwiched between two or more polymeric layers, the spaces being the interstices of the scrim. Suitable radar attenuating materials for inclusion in these spaces include carbon granules, carbon fiber, carbonyl iron, ferrites or metal coated microspheres. Carbon fiber is conveniently used in chopped or otherwise relatively short fiber form. The textiles offer lightweight with equivalent radar attenuation performance to known textiles and may include further radar attenuating material in polymeric components to provide enhanced attenuation effect.
    Type: Grant
    Filed: May 24, 1995
    Date of Patent: October 6, 1998
    Assignee: The Secretary of State for Defence in her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
    Inventors: John Alderson, Alan F. Vickers
  • Patent number: 5810656
    Abstract: A toxic work enclosure (1) with a port (14) and a vent (18) that when installed within a fume cupboard (64) with both the port (14) and the vent (18) open, provides safe access to toxic materials, if present, in the toxic work enclosure (1); but with both the port (14) and the vent (18) closed, closed position isolates the toxic work enclosure (1) allowing environmental control of the air (104) within the toxic work enclosure (1), or safe removal of the toxic work enclosure (1) from the fume cupboard (64) by containment of toxic materials, if present, in the toxic work enclosure (1).
    Type: Grant
    Filed: May 21, 1996
    Date of Patent: September 22, 1998
    Assignee: The Secretary of State for defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
    Inventors: Geoffrey Keith Dowdell, James Judge, Brian James Stokes
  • Patent number: 5805102
    Abstract: Tracking means for establishing a line-of-sight between a control point towards which the second craft is being guided and tracking the line-of-sight to follow the second craft and deriving a signal .theta..sub.a representing the rate of rotation of the line-of-sight about the control point; monitoring means for deriving a signal e representing the displacement of the first craft from the line-of-sight, a signal representing the range R.sub.m from the control point to the first craft and a signal representing the rate of of change R.sub.m of the range R.sub.m ; ranging means for deriving a signal representing the range R.sub.t from the control point to the second craft and a signal representing the rate of change R.sub.t of the range R.sub.t ; a computer for deriving representations of .theta..sub.c, .theta..sub.c and .theta..sub.c which satisfy the equation.sub.c =-2.theta..sub.c.sup.3 -3.theta..sub.c (R.sub.t /R.sub.t)where the difference .theta..sub.c -.theta..sub.
    Type: Grant
    Filed: October 31, 1975
    Date of Patent: September 8, 1998
    Assignee: The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
    Inventors: Eric Heap, Peter John Herbert
  • Patent number: 5804775
    Abstract: A lightweight acoustic enclosure (1.1), for the reduction of noise transmission from monopole, quadrapole and higher order noise sources via airborne paths at frequencies lower than the approximate ring frequency of the enclosure (1.1), comprising an approximately spherical shaped enclosure (1.1), which is made from stiff materials to reduce the amount of stretching of the enclosure wall and substantially encases the noise source, all structural paths between the enclosure and the noise source comprising vibration isolation (2.4). The thickness of the enclosure wall can be relatively thin. The enclosure (1.1) can comprise multiple concentric layers of stiff material, ideally with adjacent layers having at least one compliant layer, such as foam rubber, sandwiched between them. The enclosure (1.1) can comprise several component parts such as spherical shell elements (1.2), with radii less than that of the approximate radius of the enclosure (1.1). Additional webbings or flanges (1.
    Type: Grant
    Filed: November 26, 1996
    Date of Patent: September 8, 1998
    Assignee: The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
    Inventor: Roger James Pinnington
  • Patent number: 5798143
    Abstract: A method for producing hollow diamond tubes by diamond growth using chemical vapor deposition (CVD) techniques. Suitable substrate material, such as tungsten, molybdenum, copper or silicon, typically in the form of wire, having diamond nucleation sites is formed into a helix. The helix is then placed, or moved through, a CVD chamber for deposition of diamond on the helix. Suitable pitch and diameter of helix results in deposition diamond on the helix until such time as the growth surfaces of the diamond fuse to form a hollow diamond tube.
    Type: Grant
    Filed: January 15, 1997
    Date of Patent: August 25, 1998
    Assignee: The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
    Inventor: Peter George Partridge
  • Patent number: 5798214
    Abstract: A method is provided for determining the presence and/or amount of a microorganism and/or its intracellular material present in a sample performed by: (a) exposing the sample to a specific binding agent that has been immobilized upon a solid substrate, the specific binding agent being capable of binding to the microorganism or its intracellular material such that it becomes associated with the solid substrate, (b) exposing the solid substrate to an agent capable of making adenylate kinase associated with the microorganism and/or its intracellular material accessible to solutions applied to the substrate, (c) applying a solution containing adenosine diphosphate (ADP) to the substrate under conditions whereby adenosine triphosphate (ATP) may be produced by any adenylate kinase present, and (d) measuring the amount of adenosine triphosphate (ATP) and relating that to the presence and/or amount of microorganism or intracellular contents.
    Type: Grant
    Filed: January 6, 1997
    Date of Patent: August 25, 1998
    Assignee: The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland of Defence Evaluation and Research Agency
    Inventor: David James Squirrell
  • Patent number: 5796459
    Abstract: A nematic liquid crystal device with two bistable switched states, having two cell walls treated which provide a bigrating on one or both cell walls. The bigrating enables the liquid crystal molecules at a surface to lie in two different angular directions, 45 or 90 degrees apart. The bigrating may be symmetric or asymmetric, with the surface energy of each of the gratings of the bigratings being nearly equal.
    Type: Grant
    Filed: September 20, 1996
    Date of Patent: August 18, 1998
    Assignee: The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
    Inventors: Guy P. Bryan-Brown, Damien G. McDonnell, Michael J. Towler, Martin S. Bancroft
  • Patent number: 5791904
    Abstract: A speech training aid compares a trainee's speech with models of speech, stored as sub-acoustic word models, and a general speech model to give an indication of whether or not the trainee has spoken correctly. An indication of how well the word has been pronounced may also be given. An adult operator enters the word to be tested into the training aid which then forms a model of that word from the stored sub-word speech models. The stored acoustic models are formed by first recording a plurality of words by a plurality of trainees from a given list of single words. These recordings are then processed off-line to give a basic acoustic model of an acceptable or correct sound for each phoneme in the context of the pre-and proceeding phonemes. The acoustic models are Hidden Markov Models. The limits of acceptable pronunciation, applied to different words and trainees, may be adjusted by variable penalty values applied in association with the general speech acoustic model.
    Type: Grant
    Filed: June 17, 1996
    Date of Patent: August 11, 1998
    Assignee: The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
    Inventors: Martin J. Russell, Robert W. Series, Julie L. Wallace
  • Patent number: 5773710
    Abstract: A method and apparatus for monitoring a gaseous environment for the presence of cellular material capable of providing a measure of presence and/or numbers of cellular microorganisms, such as bacterial cells, in a large volume of air such as in a warehouse or production facility or in an open air location where bacterial presence is suspected. The method and apparatus are particularly suited for determining the likelihood of pathogenic material being present in an environment by batch or on-line measurement of cell numbers. On-line measurement provides continuous monitoring of an environment for presence of pathogens. The device includes a continuous flow luminometer preferably fed by a cyclone or high velocity virtual impactor and lytic and luminescence reagents which detect the amount of ATP or adenylate kinase present in a sample of air.
    Type: Grant
    Filed: February 5, 1997
    Date of Patent: June 30, 1998
    Assignee: The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
    Inventor: David James Squirrell
  • Patent number: 5770453
    Abstract: A method for the detection of chemical agent present in a material comprising exposing a calixarene, having redox active substituents on its para rim, to a solution or suspension derived by admixture of all or some of the material with a liquid measuring any change in electrical behavior of the calixarene during or after exposure to the solution or suspension as compared to a reference condition, and relating such change in electrical behavior to the presence of chemical agent. Preferably, the calixarene exposed to the solution or suspension is a calix?4!arene or general formula (J), wherein Y.sup.1 to Y.sup.4 are independently selected from hydrogen, alkyl, alkenyl, aryl, aralkyl or a redox active substituent and R.sup.1 to R.sup.4 are independently selected from hydrogen, alkyl, alkenyl, aryl, aralkyl, or a polymerisable moiety, wherein at least one of Y.sup.1 to Y.sup.4 is a redox active substituent.
    Type: Grant
    Filed: April 23, 1996
    Date of Patent: June 23, 1998
    Assignee: The Secretary of State for Defence in her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
    Inventors: Paul Beer, Matthew Shade, Zheng Chen
  • Patent number: 5764325
    Abstract: A twisted nematic type of liquid crystal device comprises two cell walls enclosing a layer of a nematic or long pitch cholesteric liquid crystal material. The device has both an alignment direction and a surface tilt provided by an asymmetric grooves structure alignment on one or both walls. The alignment treatment may be provided by a shaped layer of a photolithographic material. Embossing, ruling, or transferred from a carrier layer material may alternatively provide the alignment. The amount of twist may be multiples of about 90.degree. and the device arranged between two polarisers.
    Type: Grant
    Filed: October 3, 1996
    Date of Patent: June 9, 1998
    Assignee: The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
    Inventors: Guy Peter Bryan-Brown, Damien Gerard McDonnell, Michael John Towler
  • Patent number: 5754264
    Abstract: A ferroelectric liquid crystal device comprises a layer of a ferroelectric liquid crystal material contained between two cell walls carrying electrode structures and a surface alignment treatment. The surface alignment is provided by a profiled surface, e.g., a grating, on at least one cell wall. The grating may be a monograting or a bigrating, with a symmetric or asymmetric profile. Such a profiling enables surface tilt and alignment anchoring energy to be independently arranged to suit liquid crystal material and device type to give a required molecular arrangement and low device defect. The grating may be provided by interferography, photolithography, embossing, ruling, or carrier layer transfer. Alignment directions on the cell walls may be parallel or non-parallel. The surface tilt on both cell walls may be the same or different values. The cell walls may be relatively rigid, e.g., glass slides, or flexible, e.g.
    Type: Grant
    Filed: August 6, 1996
    Date of Patent: May 19, 1998
    Assignee: The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
    Inventors: Guy Peter Bryan-Brown, Damien Gerard McDonnell, Michael John Towler, John Clifford Jones
  • Patent number: 5754263
    Abstract: A liquid crystal display element using ferroelectric liquid crystal includes a light blocking thin film which is formed by silicon or silicon-germanium solid solution by evaporation between electrodes formed by an ITO film placed in a striped pattern on a surface of a transparent glass substrate so that the thin film does not protrude from the ITO film surface. This thin film shades a non-pixel region as a black matrix.
    Type: Grant
    Filed: November 1, 1996
    Date of Patent: May 19, 1998
    Assignees: Sharp Kabushiki Kaisha, The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
    Inventors: Hisashi Akiyama, Shuji Miyoshi
  • Patent number: 5753379
    Abstract: An optical component having a protective layer provided on a surface thereof, the protective layer preventing the component from being damaged by high velocity impacts from small particles or water droplets. The protective coating comprises a layer of gallium phosphide deposited onto the component surface using plasma assisted chemical vapour deposition (PACVD), an intermediate layer of PACVD boron phosphide, and an outer layer of PACVD diamond-like-carbon.
    Type: Grant
    Filed: July 17, 1995
    Date of Patent: May 19, 1998
    Assignees: Barr & Stroud Limited, The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
    Inventors: Desmond Robert Gibson, Keith Loder Lewis, Ewan MacKinnon Waddell
  • Patent number: 5750337
    Abstract: The present invention relates a method for the detection, identification and/or quantification of plant or animal tissues, microorganisms or cell free RNA or DNA and to detector apparatus adapted for performing said method. The method particularly uses Total Internal Reflection Fluoresence (TIRF) to measure hybridization of analyte RNA or DNA with RNA or DNA that is associated with an evanescent wave detector waveguide.
    Type: Grant
    Filed: February 23, 1994
    Date of Patent: May 12, 1998
    Assignee: The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland
    Inventor: David J. Squirrell
  • Patent number: 5748664
    Abstract: An all-solid-state laser comprising a slab (1) of gain medium, a diode laser pump system (3) configured in an end pumping geometry with the gain medium (1) and a heat sink thermally contacted to the gain medium (1) wherein the diode laser pump system (3) and the gain medium (1) are cooperably arranged so that in use a positive thermal lens is capable of being formed within the medium, the gain medium (1) having a thickness (d-d') made as small as possible while permitting the substantially unhindered passage through the slab of the laser mode established between the two mirrors (M1, M2).
    Type: Grant
    Filed: November 6, 1996
    Date of Patent: May 5, 1998
    Assignee: The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
    Inventors: Malcolm Harry Dunn, Wilson Sibbett, Peter Rahlff Christian, Bruce David Sinclair, Michael Andrew Firth
  • Patent number: 5745082
    Abstract: A radiation sensor (10) for the microwave and millimeter-wave regions incorporates a lens (12) having two parallel focal planes (26a, 36), these being defined by a polarization-selective reflecting PIN diode array (18) within the lens (12). One focal plane (26a) is occupied by a receive array of crossed dipole antennas which mixes receive signals and a local osicllator signal to produce intermediate frequency signals for subsequent processing. The second focal plane (36) is occupied by a transmit antenna array of separately activatable polarization switching antennas arranged to define a range of transmit beam directions. A second PIN diode array (20) protects the receive antenna array from the transmit beam.
    Type: Grant
    Filed: January 19, 1996
    Date of Patent: April 28, 1998
    Assignee: The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
    Inventor: Christopher J. Alder
  • Patent number: 5741604
    Abstract: A method of applying a stable intermetallic diffusion barrier layer to a metallic article is described. In many instances, protective coatings are incompatible with the material of the substrate to which they are applied. Such incompatibility is overcome in the invention through in situ formation of an intermediate stable diffusion barrier layer by sequential deposition and subsequent reaction of suitable metals to form a continuous intermetallic layer. A conventional overlay coating may then be applied to the intermetallic layer without risk to the underlying substrate. The invention also contemplates creation of unitary diffusion barriers from multi-layer deposits; deposition of plural diffusion barriers, and formation of complete protective systems comprising substrate, diffusion barrier(s) and overlay coating prior to heat treatment in situ.
    Type: Grant
    Filed: October 25, 1995
    Date of Patent: April 21, 1998
    Assignee: The Secretary of State for Defence in her Britannic Majesty's Government of the United Kingdom of Great Britain & Northern Ireland of Defence & Evaluation Research Agency,DRA
    Inventors: Martin J. Deakin, John R. Nicholls
  • Patent number: 5724060
    Abstract: The invention provides a ferro-electric liquid crystal display (FLCDs) with reduced voltages requirements for driver circuits. This enables standard drivers circuits designed to rms address twisted nematic type of displays, to be used for FLCDs. Displays are formed by cells containing smectic liquid crystal material. The cell walls are surface treated and carry e.g. row and column electrodes forming an x,y matrix of addressable display elements. The smectic liquid crystal material switches between two states upon application of a dc pulse of appropriate amplitude, polarity, and time. Addressing waveforms are strobe waveforms, e.g. two pulses of opposite polarity in successive time slots, applied to each row in turn. Data waveforms are, e.g. dc pulses of alternate polarity with each pulse lasting one time slot ts. Two data waveforms are needed to switch between the two states; one data waveform is the inverse of the other. Typically a strobe waveform pulse may be 50 volts.
    Type: Grant
    Filed: August 14, 1995
    Date of Patent: March 3, 1998
    Assignee: The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
    Inventors: Alistair Graham, Jonathan R. Hughes, Michael John Towler