Patents by Inventor Robert Bristow
Robert Bristow 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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Floor system providing omnidirectional movement of a person walking in a virtual reality environment
Patent number: 10416754Abstract: A modular floor with active tiles that utilize numerous friction or contact disks each with a raised segment or portion on their edges that together provide a planar contact surface for the active tile. Each disk is oriented at a fixed tilt angle to define which part of the disk's outer surfaces act as the raised portion, and each disk is oriented to position where the raised surface is located so as to define the direction that a supported object is moved over the modular floor. The drive system typically includes, for each disk assembly, a disk orienting mechanism along with a disk rotation mechanism to rotate the disk at a rotation rate about its central axis. The controller of the motion system operates the disk orienting mechanism to orient the disk so that a particular location on the disk behaves as the raised portion where an object is contacted.Type: GrantFiled: October 23, 2017Date of Patent: September 17, 2019Assignee: DISNEY ENTERPRISES, INC.Inventors: Lanny S. Smoot, Günter D. Niemeyer, David Loyal Christensen, Robert Bristow -
FLOOR SYSTEM PROVIDING OMNIDIRECTIONAL MOVEMENT OF A PERSON WALKING IN A VIRTUAL REALITY ENVIRONMENT
Publication number: 20180217662Abstract: A modular floor with active tiles that utilize numerous friction or contact disks each with a raised segment or portion on their edges that together provide a planar contact surface for the active tile. Each disk is oriented at a fixed tilt angle to define which part of the disk's outer surfaces act as the raised portion, and each disk is oriented to position where the raised surface is located so as to define the direction that a supported object is moved over the modular floor. The drive system typically includes, for each disk assembly, a disk orienting mechanism along with a disk rotation mechanism to rotate the disk at a rotation rate about its central axis. The controller of the motion system operates the disk orienting mechanism to orient the disk so that a particular location on the disk behaves as the raised portion where an object is contacted.Type: ApplicationFiled: October 23, 2017Publication date: August 2, 2018Inventors: LANNY S. SMOOT, GÜNTER D. NIEMEYER, DAVID LOYAL CHRISTENSEN, ROBERT BRISTOW -
Patent number: 8320845Abstract: A radio transmitter includes a transmitter circuit which produces a signal at a first frequency, and has digital divider circuitry, for dividing the first frequency to produce a signal at a second frequency. The noise performance of the digital divider is adjusted, depending upon the transmitter output power. Specifically, the digital divider is operated with a relatively good noise performance when the gain of the power amplifier is high, and is operated with a worse noise performance at low output powers. This can ensure that a specified noise requirement is met, without excessively increasing the power consumption or the size of the device.Type: GrantFiled: July 7, 2008Date of Patent: November 27, 2012Assignee: Telefonaktiebolaget L M Ericsson (Publ)Inventor: Robert Bristow
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Publication number: 20090088099Abstract: A radio transmitter includes a transmitter circuit which produces a signal at a first frequency, and has digital divider circuitry, for dividing the first frequency to produce a signal at a second frequency. The noise performance of the digital divider is adjusted, depending upon the transmitter output power. Specifically, the digital divider is operated with a relatively good noise performance when the gain of the power amplifier is high, and is operated with a worse noise performance at low output powers. This can ensure that a specified noise requirement is met, without excessively increasing the power consumption or the size of the device.Type: ApplicationFiled: July 7, 2008Publication date: April 2, 2009Inventor: Robert Bristow
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Patent number: 7412216Abstract: A radio transmitter includes a transmitter circuit which produces a signal at a first frequency, and has digital divider circuitry, for dividing the first frequency to produce a signal at a second frequency. The noise performance of the digital divider is adjusted, depending upon the transmitter output power. Specifically, the digital divider is operated with a relatively good noise performance when the gain of the power amplifier is high, and is operated with a worse noise performance at low output powers. This can ensure that a specified noise requirement is met, without excessively increasing the power consumption or the size of the device.Type: GrantFiled: March 17, 2004Date of Patent: August 12, 2008Assignee: Telefonaktiebolaget L M Ericsson (Publ)Inventor: Robert Bristow
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Publication number: 20070037533Abstract: A radio transmitter includes a transmitter circuit which produces a signal at a first frequency, and has digital divider circuitry, for dividing the first frequency to produce a signal at a second frequency. The noise performance of the digital divider is adjusted, depending upon the transmitter output power. Specifically, the digital divider is operated with a relatively good noise performance when the gain of the power amplifier is high, and is operated with a worse noise performance at low output powers. This can ensure that a specified noise requirement is met, without excessively increasing the power consumption or the size of the device.Type: ApplicationFiled: March 17, 2004Publication date: February 15, 2007Inventor: Robert Bristow
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Publication number: 20060057993Abstract: A method and apparatus (200) for modulating I and Q signals to compensate for phase error between the quadrature outputs of a local oscillator (126) of a quadrature modulator(s). The error in the quadrature outputs of the local oscillator is effectively compensated by pre-processing (201) incoming I(t) and Q(t) baseband signals to generate composite signals adding (102) and subtracting (108) scaled (202, 210, 204, 214) I(t) and Q(t). These composite signals form the input (19, 21) of quadrature modulator(s), the method comprising the steps of: applying a first scaling factor to an input I signal; applying a second scaling factor to an input Q signal; adding the scale I and Q signals; subtracting the scale I and Q signals; and quadrature modulating the added and subtracted signals.Type: ApplicationFiled: December 15, 2003Publication date: March 16, 2006Applicant: Telefonaktiebolaget L M Ericsson (publ)Inventor: Robert Bristow
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Patent number: 6975667Abstract: A dual-radio communication apparatus has a first radio device, such as a Bluetooth radio, for use in a first frequency band, and a second radio device, such as a Globalstar satellite radio, for use in a second frequency band, which is proximate to the first frequency band. The communication apparatus also has a controller coupled to the first and second radio devices. The first radio device may comprise a frequency-hopping spread-spectrum transmitter. Moreover, the first radio device has a first operating mode employing a first frequency range. The first radio device also has a second operating mode employing a second frequency range, which is smaller than the first frequency range. The controller is adapted to set the first radio device in its second operating mode, when the second radio device is in operation, and otherwise set the first radio device in its first operating mode.Type: GrantFiled: May 17, 2001Date of Patent: December 13, 2005Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventors: Sven Mattisson, Jacobus Haartsen, Robert Bristow
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Publication number: 20020012381Abstract: A dual-radio communication apparatus (100) has a first radio device (110), such as a Bluetooth radio, for use in a first frequency band, and a second radio device (120), such as a Globalstar satellite radio, for use in a second frequency band, which is proximate to the first frequency band. The communication apparatus also has a controller coupled to the first and second radio devices. The first radio device may comprise a frequency-hopping spread-spectrum transmitter. Moreover, the first radio device (110) has a first operating mode employing a first frequency range. The first radio device also has a second operating mode employing a second frequency range, which is smaller than the first frequency range. The controller is adapted to set the first radio device in its second operating mode, when the second radio device (120) is in operation, and otherwise set the first radio device in its first operating mode.Type: ApplicationFiled: May 17, 2001Publication date: January 31, 2002Inventors: Sven Mattisson, Jacobus Haartsen, Robert Bristow
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Patent number: D366871Type: GrantFiled: July 14, 1993Date of Patent: February 6, 1996Assignee: Fostex Research & Development, Inc.Inventors: Eric Richardson, Jeffrey B. Postupack, Paul W. Brown, Clifford Sielitsky, Peter Phillips, Steven Maker, Lee A. McDavid, Robert Merrill, J. Alan Witmer, William Leathers, Matt P. Bucy, Jeffrey W. Doyle, Michael Geilich, Eric Gottesman, Gerald F. Halstead, Lannelle Jalowiec, Linda J. Donley, Richard Rosenzweig, Troy D. Andrews, Jeffrey C. Cunningham, Alexander Kish, Timothy Pinkham, David Russell, Lisa J. Thompson, Wu-Cheng Tsai, Robert Bristow-Johnson, Tyler Brown, Milton A. Colvin, Cameron W. Jones, Scott C. Peer, Ivor Taylor, Richard Wear, Dave Oren, Mickey Matsumoto