Patents by Inventor Cyril Hilsum

Cyril Hilsum 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: 8765027
    Abstract: A polymer composition comprises at least one substantially non-conductive polymer binder and at least first and second electrically conductive fillers. The first electrically conductive filler is comprised of particles having avoid-bearing structure; and the second electrically conductive filler is comprised of particles which are acicular in shape.
    Type: Grant
    Filed: May 2, 2008
    Date of Patent: July 1, 2014
    Assignee: Peratech Limited
    Inventors: David Lussey, David Bloor, Paul Laughlin, Cyril Hilsum
  • Patent number: 8449974
    Abstract: An electrically responsive composite material is disclosed, along with a method of producing an electrically responsive composite material, a transducer having a substrate for supporting a flowable polymer liquid and a method of fabricating a transducer. The electrically responsive composite material produced is configurable for application in a transducer. The method includes the steps of receiving the flowable polymer liquid and introducing electrically conductive acicular particles (1501, 1502) to facilitate the conduction of electricity by quantum tunneling. Dielectric particles (1505, 1506) are added of a size relative to the acicular particles such that a plurality of these dielectric particles are dispersed between adjacent acicular particles.
    Type: Grant
    Filed: August 26, 2009
    Date of Patent: May 28, 2013
    Assignee: Peratech Limited
    Inventors: David Lussey, David Bloor, Paul Jonathan Laughlin, Adam Graham, Cyril Hilsum
  • Publication number: 20110253948
    Abstract: A polymer composition comprises at least one substantially non-conductive polymer binder and at least first and second electrically conductive fillers. The first electrically conductive filler is comprised of particles having avoid-bearing structure; and the second electrically conductive filler is comprised of particles which are acicular in shape.
    Type: Application
    Filed: May 2, 2008
    Publication date: October 20, 2011
    Applicant: PERATECH LIMITED
    Inventors: David Lussey, David Bloor, Paul Laughlin, Cyril Hilsum
  • Publication number: 20100062148
    Abstract: An electrically responsive composite material is disclosed, along with a method of producing an electrically responsive composite material, a transducer having a substrate for supporting a flowable polymer liquid and a method of fabricating a transducer. The electrically responsive composite material produced is configurable for application in a transducer. The method includes the steps of receiving the flowable polymer liquid and introducing electrically conductive acicular particles (1501, 1502) to facilitate the conduction of electricity by quantum tunneling. Dielectric particles (1505, 1506) are added of a size relative to the acicular particles such that a plurality of these dielectric particles are dispersed between adjacent acicular particles.
    Type: Application
    Filed: August 26, 2009
    Publication date: March 11, 2010
    Applicant: PERATECH LIMITED
    Inventors: David Lussey, David Bloor, Paul Jonathan Laughlin, Adam Graham, Cyril Hilsum
  • Patent number: 6388256
    Abstract: A thermal detector device comprising an array of thermal detector elements, an array of microbridge structures comprising the array of thermal detector elements, readout silicon integrated circuitry (ROIC) and an interconnect layer on which the array of microbridge structures are arranged. The interconnect layer comprises a plurality of conducting interconnect channels providing an electrical connection between the microbridge structures and input contacts on the ROIC such that the microbridge structures are in electrical contact with, but are separated from, the readout silicon integrated circuitry. As the interconnect layer separates the microbridge structures from the ROIC, the detector material, typically a ferroelectric material, may be fabricated on the microbridge structures at a deposition or anneal temperature which is not limited by the avoidance of damage to the ROIC. Deposition temperatures of at least 500° C. or, preferably, at higher temperatures e.g. 700° C.-900° C.
    Type: Grant
    Filed: December 1, 1999
    Date of Patent: May 14, 2002
    Assignee: Qinetiq Limited
    Inventors: Rex Watton, Cyril Hilsum
  • Patent number: 4996104
    Abstract: A device for indicating whether a rise in temperature above a predetermined value has occurred includes a support member, such as a label, on which a temperature-sensitive material is deposited. The material includes a large number of fracturable microcapsules containing a medium which changes from a solid state to a liquid state at the predetermined temperature value. The viscosity of the medium in its liquid state and the material of the support member are chosen such that the distance d.sub.1 by which the medium flows across the support member after the fracturing of the microcapsules so as to activate the device is indicative of the time between activation of the device and cooling of the device to below the predetermined temperature value. If the temperature is subsequently allowed to rise above the predetermined value, the medium will again assume its liquid state and will flow further across the support member, reaching a distance of, say, d.sub.
    Type: Grant
    Filed: March 23, 1989
    Date of Patent: February 26, 1991
    Assignee: The General Electric Company, p.l.c.
    Inventors: Beatrice M. Nicholas, Alan Mosley, Cyril Hilsum, Michael G. Clark
  • Patent number: 4838662
    Abstract: A display device is described which comprises a liquid crystal host material and an anisotropically emitting fluorescent guest material dissolved in the host material such that the molecules of the guest material align with the molecules of the host material. An electric field applied across the host material causes the direction of radiation emitted by the guest material incident on an interface between two materials of different refractive index to vary so as to control the amount of radiation emitted by the display.
    Type: Grant
    Filed: April 26, 1988
    Date of Patent: June 13, 1989
    Assignee: The General Electric Company, p.l.c.
    Inventors: Cyril Hilsum, Robert L. Van Ewyk, Ingrid M. O'Connor
  • Patent number: 4834500
    Abstract: A thermochromic liquid crystal display comprises a layer of short pitch cholesteric liquid crystal material between two walls. An absorber covers the back of the rear wall. At least one wall is surface profiled with a fine grating to align the liquid crystal material. Typically the grating pitch is 0.05 to 12 .mu.m. The profile may be fine on one wall e.g. 0.05 to 12 .mu.m pitch, 0.1 .mu.m depth and coarse e.g. 125 .mu.m pitch groove width 100 .mu.m, depth 10 .mu.m on the other wall. The cholesteric pitch is arranged to give the desired a selective reflection of light whereby the display is observed to change color with temperature. Using thin flexible walls small displays may be cut from large sheets of embossed polyester plastic materials.
    Type: Grant
    Filed: February 19, 1987
    Date of Patent: May 30, 1989
    Assignee: The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
    Inventors: Cyril Hilsum, Kyle E. N. Kerr, Damien G. McDonnell
  • Patent number: 4792213
    Abstract: A thermal imaging device uses a compensated cholesteric liquid crystal mixture as its thermo-optic conversion element. The mixture is obtained by mixing two cholesteric liquid crystals, one with a left-handed twist and the other with a right-handed twist. The twists cancel at a compensation temperature, the mixture thus having infinite twist at this temperature. The device is designed to operate with the mixture held in the region of the compensation temperature.
    Type: Grant
    Filed: August 4, 1986
    Date of Patent: December 20, 1988
    Assignee: The General Electric Company, p.l.c.
    Inventor: Cyril Hilsum
  • Patent number: 4717244
    Abstract: An active matrix addressed liquid crystal display is described, each liquid crystal cell within the display having two electrodes each carried on a surface of a different one of two insulating plates. Each cell is connected via a respective transistor to a pair of address lines each address line within a pair being connected to different cells within the array, and each line within a pair being carried on a different plate. Synchronized electrical pulses are applied to the address lines to switch on selected cells within the array, the sense of the pulses on one of the lines being periodically changed.
    Type: Grant
    Filed: March 18, 1986
    Date of Patent: January 5, 1988
    Assignee: The General Electric Company, p.l.c.
    Inventors: Cyril Hilsum, Rene J. Van de Poel
  • Patent number: 4630115
    Abstract: A display device which is corrected for vibration, for example between screen (4) and the electron gun (2) in a C.R.T. (1). The device comprises an optical system (6) on the observer side of the screen (4) for directing the light from a small part of the screen (9), onto which the electron beam is directed at intervals, onto a photocell (10) which detects the position of the light spot. The output signal from the photocell is processed in a circuit (5) to provide a correction signal which is applied to the deflection system (3) of the C.R.T. to reduce the deviation of the light spot from the position it would have in a vibration-free environment.
    Type: Grant
    Filed: December 10, 1984
    Date of Patent: December 16, 1986
    Assignee: The General Electric Company, p.l.c.
    Inventor: Cyril Hilsum
  • Patent number: 4551653
    Abstract: A color cathode ray tube display device which is compensated for color distortion due to, e.g. vibration, comprises means (9-12) for producing signals representing the respective color light outputs from the phosphor screen (5), means (13) for comparing the signals with the corresponding color impact video signals and means (14) to provide a correction signal to reduce any deviation between the signals.
    Type: Grant
    Filed: May 24, 1984
    Date of Patent: November 5, 1985
    Assignee: The General Electric Company, p.l.c.
    Inventor: Cyril Hilsum
  • Patent number: 4529968
    Abstract: A touch sensitive switch with a liquid crystal cell and a circuit for measuring capacitive changes when the cell is deformed by touch. The cell has a layer of a liquid crystal material between slides bearing electrodes. Capacitive changes are detected for example by a comparator or by a bridge circuit which includes one or more cells. Touching one cell unbalances the bridge. The area of cell that is touched may be coincident with or separate from a display area. For some types of cells extra sensitivity is achieved by maintaining a voltage across the cell between a critical and saturation value.
    Type: Grant
    Filed: November 10, 1982
    Date of Patent: July 16, 1985
    Assignee: The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
    Inventors: Cyril Hilsum, Edward P. Raynes
  • Patent number: 4525032
    Abstract: A liquid crystal display comprises a layer of cholesteric or smectic liquid crystal material contained between a front and rear wall. A pen having a tip is caused to move across the front wall causing an observable change in the liquid crystal under the pen tip. The change in liquid crystal material may be between its grandjean or planar state and focal conic state. This change may be caused by local pen tip pressure, heat, light or electric field. Erasure of observed information is by flexing of the liquid crystal layer. Alternatively heating and cooling, or an electric field may be used to erase the information. A resistive layer covers the front wall so that the instantaneous position of the pen can be fed through bus bars to a computer. This computer compares the electrical version of an observed signature on the display with a stored signature.
    Type: Grant
    Filed: July 27, 1982
    Date of Patent: June 25, 1985
    Assignee: The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
    Inventor: Cyril Hilsum
  • Patent number: 4468137
    Abstract: A temperature indicating device comprising a series of liquid crystal cells each of which contains a liquid crystal material having a different composition, the composition varying from cell-to-cell, and each of which cells exhibits the grandjean state whereby temperature is indicated by iridescence of the cells, the cells being such that the liquid crystal material in each has a clearing point at a different selected temperature in a series of temperature in a temperature range of interest and that each of the cells is such that its liquid crystal material does not revert immediately to the grandjean state on cooling from the isotropic liquid state wherein the improvement comprises the cells having a construction such that the liquid crystal material of each cell undergoes, on cooling from the isotropic liquid state, the transition isotropic liquid state to focal conic state, without reverting immediately to the grandjean state.
    Type: Grant
    Filed: October 5, 1981
    Date of Patent: August 28, 1984
    Assignee: National Research Development Corporation
    Inventors: Cyril Hilsum, Damien G. McDonnell
  • Patent number: 4460247
    Abstract: A liquid crystal display comprises two transparent slides containing a thin layer of liquid crystal material which may be nematic or cholesteric. Addressing electrode structures on the inner faces of the slide allow voltages to be applied across the layer to cause an observable display effect. The voltage at which an observable display occurs is temperature dependent. Sensing electrodes are connected in series with a reference impedance (Z.sub.f). With a constant supply voltage (V.sub.o) across the sensing electrodes and reference impedance (Z.sub.f) the voltage (V.sub.LC) variation is used to control the voltages applied to the addressing electrode to compensate for temperature variations in the layer.
    Type: Grant
    Filed: December 20, 1978
    Date of Patent: July 17, 1984
    Assignee: The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
    Inventors: Cyril Hilsum, Edward P. Raynes
  • Patent number: 4139261
    Abstract: A display comprises a plurality of addressable display panels each having a display zone for displaying visual information and arranged in a formation so as to collectively provide a composite display of increased area. A fibre optic image transform construction is arranged in front of the display panels for transforming an image collectively provided by the panels into a corresponding continuous image in which discontinuity between adjacent panel display zones is eliminated.
    Type: Grant
    Filed: January 26, 1977
    Date of Patent: February 13, 1979
    Assignee: The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Nothern Ireland
    Inventor: Cyril Hilsum
  • Patent number: 4137481
    Abstract: A d.c. electroluminescent panel comprises a transparent substrate, a transparent first electrode film, a phosphor layer, and a second electrode film. Application of a voltage across the phosphor layer causes it to emit light.In this invention the phosphor layer is produced in two layers, a first semi-insulating thin layer of activator doped phosphor and a second electrically conducting layer of phosphor.
    Type: Grant
    Filed: October 18, 1977
    Date of Patent: January 30, 1979
    Assignee: The Secretary of State of Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
    Inventors: Cyril Hilsum, John Kirton, Adrian L. Mears
  • Patent number: 4003081
    Abstract: A color display system, for example an electronic data display or a color television system incorporates a display screen, for example a cathode ray tube phosphor, and at least one liquid crystal color filter. The screen emits light in the form of visual information in at least two colors, and the filter is controlled electrically in such a way that the colors transmitted by the screen may be switched according to input signal used to energize the screen.
    Type: Grant
    Filed: January 20, 1975
    Date of Patent: January 11, 1977
    Assignee: The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
    Inventors: Cyril Hilsum, Ian Alexander Shanks
  • Patent number: 3972040
    Abstract: A refreshed electro-optic display comprising a plurality of individually addressed display elements which may be arranged in a matrix form is characterised in that the memory for refreshing is derived from the display elements themselves. Each display element is refreshed by sensing by one or a plurality of sensors the state of a physical property of the element to detect whether or not it has been selected to be operated and by feeding a control signal in an individual feedback loop from the sensor to open an electronic gate, to apply an electrical potential to the element, when sensed to be operated, to keep it in the operated state. The physical property sensed may be the electrical capacitance or resistance of the display elements, the state of light emission or modulation from them or the state of charge storage within them. Preferably a voltage is developed which depends on the state of the property.
    Type: Grant
    Filed: August 12, 1974
    Date of Patent: July 27, 1976
    Assignee: The Secretary of State for Defence in Her Britannic Majesty's Government of the United Kingdom of Great Britain and Northern Ireland
    Inventors: Cyril Hilsum, Adrian Leonard Mears