Patents by Inventor Graham Atkin
Graham Atkin 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).
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Patent number: 7352940Abstract: This invention relates to devices for coupling light between an optical waveguide and an optical element in a manner that is substantially independent of temperature, using reflective optics. Certain embodiments of the invention concern improved designs for the transmit and receive optics of a waveguide-based optical touch screen sensor, incorporating reflective optics. The improved designs have substantially temperature independent operation and reduced optical losses. In one preferred embodiment the improved design incorporates a parabolic or quasi-parabolic reflector. In another preferred embodiment the improved design incorporates an elliptical or quasi-elliptical reflector. The transmit and receive elements and associated waveguides preferably comprise photo-patternable polymers.Type: GrantFiled: February 7, 2006Date of Patent: April 1, 2008Assignee: RPO Pty LimitedInventors: Robbie Charters, Benjamin Cornish, Barry Luther-Davies, Dax Kukulj, Graham Atkins
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Publication number: 20080074402Abstract: The present invention relates to waveguide structures and optical elements for use in an optical touch screen sensor. The waveguide structures and optical elements allow for reduced bezel width and simplified assembly of optical touch screens sensors, and relaxed component tolerances.Type: ApplicationFiled: September 21, 2007Publication date: March 27, 2008Applicant: RPO Pty LimitedInventors: Benjamin Cornish, Robert Charters, Ian Maxwell, Graham Atkins, Dax Kukulj, Graeme Gordon
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Publication number: 20060188196Abstract: This invention relates to devices for coupling light between an optical waveguide and an optical element in a manner that is substantially independent of temperature, using reflective optics. Certain embodiments of the invention concern improved designs for the transmit and receive optics of a waveguide-based optical touch screen sensor, incorporating reflective optics. The improved designs have substantially temperature independent operation and reduced optical losses. In one preferred embodiment the improved design incorporates a parabolic or quasi-parabolic reflector. In another preferred embodiment the improved design incorporates an elliptical or quasi-elliptical reflector. The transmit and receive elements and associated waveguides preferably comprise photo-patternable polymers.Type: ApplicationFiled: February 7, 2006Publication date: August 24, 2006Applicant: RPO Pty LimitedInventors: Robbie Charters, Benjamin Cornish, Barry Luther-Davies, Dax Kukulj, Graham Atkins
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Publication number: 20060088244Abstract: A planar lenses for integrated optics applications, in particular for use in optical touch screen sensors are disclosed. The disclosed planar lenses include a slab waveguide and an optical waveguide, preferably formed in unitary fashion, wherein the slab waveguide has a curved end face to focus light into or out of the optical waveguide, and wherein at least one additional lens is included within the slab waveguide. In one aspect of this disclosure, the additional lens is a diverging lens. In a second aspect the additional lens is a converging lens. The additional lens may match the acceptance angle of the optical waveguide to the curved end face of the slab waveguide. Alternatively, it may improve the tolerance of the planar lens to design or assembly errors and/or temperature variations. Preferably, the planar lenses are composed of a photo-patternable polymer, and the additional lenses are composed of air.Type: ApplicationFiled: October 25, 2005Publication date: April 27, 2006Applicant: RPO Pty LimitedInventors: Dax Kukulj, Benjamin Cornish, Robert Charters, Graham Atkins, Barry Luther-Davies
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Patent number: 6909373Abstract: The invention discloses a system including floor tiles for monitoring the movements of individuals across a floor surface. The system is comprised of a plurality of floor tiles electrically and mechanically interconnected. The floor tiles are monitored to determine where, when and how weight is applied to the floor tiles. The system may also comprise an identification system comprising individual transmitters and a receiver. The receiver is tied into the tile monitoring system to allow the identification of an individual on the floor surface.Type: GrantFiled: May 9, 2003Date of Patent: June 21, 2005Assignee: Vitrak Wireless Inc.Inventors: Michael William Power, Graham Atkin, Bruce Mac Donald
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Publication number: 20040222896Abstract: The invention discloses a system including floor tiles for monitoring the movements of individuals across a floor surface. The system is comprised of a plurality of floor tiles electrically and mechanically interconnected. The floor tiles are monitored to determine where, when and how weight is applied to the floor tiles. The system may also comprise an identification system comprising individual transmitters and a receiver. The receiver is tied into the tile monitoring system to allow the identification of an individual on the floor surface.Type: ApplicationFiled: May 9, 2003Publication date: November 11, 2004Inventors: Michael William Power, Graham Atkin, Bruce MacDonald
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Patent number: 6800724Abstract: The present invention relates generally to a method of synthesising a metal alkoxide polymer involving the following general steps: 1. acidolysis; 2. condensation; and 3. subsequent processing. The acidolysis step is preferably performed without addition of water, in the presence of a mutual solvent. The acidolysis step involves acidolysis of a metal alkoxide compound with an acid to produce an intermediate acidolysed solution. The condensation step involves condensation of the intermediate solution in the presence of a metal alkoxide compound to produce the metal alkoxide polymer.Type: GrantFiled: April 25, 2002Date of Patent: October 5, 2004Assignees: The Australian National University, The University of SydneyInventors: Congji Zha, Graham Atkins
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Publication number: 20030077456Abstract: The present invention provides a device comprising a substrate, a buffer layer formed on a surface of the substrate, and a sol-gel based film deposited on the buffer layer, wherein the buffer layer provides an interface between the substrate and film and exhibits two distinct phases, a deformable phase at an elevated temperature sufficient to dry the film, and a stable, relatively non-deformable, phase at a lower temperature, and wherein, when in the deformable phase, the buffer layer accommodates differential movement over its thickness to an extent sufficient to prevent cracking of the film as it dries.Type: ApplicationFiled: October 15, 2002Publication date: April 24, 2003Inventors: Graham Atkins, Barry Luther-Davies, Robert Bruce Charters, Anna Samoc, Marek Julian Samoc
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Publication number: 20020165339Abstract: The present invention relates generally to a method of synthesising a metal alkoxide polymer involving the following general steps: 1. acidolysis; 2. condensation; and 3. subsequent processing. The acidolysis step is preferably performed without addition of water, in the presence of a mutual solvent. The acidolysis step involves acidolysis of a metal alkoxide compound with an acid to produce an intermediate acidolysed solution. The condensation step involves condensation of the intermediate solution in the presence of a metal alkoxide compound to produce the metal alkoxide polymer.Type: ApplicationFiled: April 25, 2002Publication date: November 7, 2002Inventors: Congji Zha, Graham Atkins
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Patent number: 5749340Abstract: A hydraulic tappet comprises an open-ended cylinder and a piston slidably accommodated in the cylinder. One end of the piston projects out of the open end of the cylinder and engages a valve rocker. A gear mechanism is provide to effect rotation of the cylinder about its axis whilst the piston remains stationary. An oil chamber is provided within the cylinder beyond the other end of the piston. A pressurized oil space is arranged to supply oil to the chamber via a non-return valve. An oil discharge space communicates with the chamber via a pathway including an opening in the cylinder wall. The pathway is interrupted by the piston as the piston moves into the cylinder. The oil discharge space is at a pressure substantially below that of the pressurized oil space. A plurality of spaced holes is arranged in a spiral line formed in the cylinder wall but only one of the holes communicates with the oil discharge space at any one time.Type: GrantFiled: June 11, 1997Date of Patent: May 12, 1998Assignee: Ricardo Consulting Engineers LimitedInventors: Alan Warburton, Graham Atkin