Patents by Inventor Lawrence Chi Hang Chan
Lawrence Chi Hang Chan 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: 7977938Abstract: A metal detector for detecting the presence of a ferrite object in the proximity of inductively coupled sensor having overlapping D shaped transmitter and receiver coils. The metal detector has a phase shift circuit to phase shifting a sensor output signal by a known amount and a switch operating in synchronization with an excitation signal of the sensor for sampling the amplitude of the phase shifted output signal.Type: GrantFiled: August 23, 2007Date of Patent: July 12, 2011Assignee: Solar Wide Industrial Ltd.Inventors: Hughes Sanoner, Desmond Wai Nang Tse, Lawrence Chi Hang Chan
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Patent number: 7726852Abstract: A canopy lighting device comprising a body having a light source and a base that magnetically couples to the body. The body and the base can be located on opposite sides of a fabric sheet to magnetically clamp the lighting device to the fabric sheet. The base may have an energy source, first electrical connection features coupled electrically to the energy source, and first magnetic connection features. The body may have a light source, second magnetic connection features for cooperating with the first magnetic connection features to clamp the body to the bases and second electrical connection features. The second electrical connection features cooperate with the first electrical connection features of the base when the body and the base are clamped together.Type: GrantFiled: September 7, 2007Date of Patent: June 1, 2010Assignee: Solar Wide Industrial Ltd.Inventors: Hughes Sanoner, Desmond Wai Nang Tse, Lawrence Chi Hang Chan
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Patent number: 7504817Abstract: A sensing device having a sensing surface for placing against a wall for detecting objects behind a wall lining has first and second sensors, each sensor including at least first and second capacitor plates and associated resistors forming RC circuits having time constants dependent on the adjacent wall material. Detection circuits connected to the RC circuits provide first and second voltage signals having amplitudes dependent on capacitance changes. A processor effects a comparison of the first and second voltage signals, and compares them to establish the magnitude of the voltage difference between the voltage signals, indicating a detected object center position when the difference signal is less than a predetermined value.Type: GrantFiled: March 28, 2007Date of Patent: March 17, 2009Assignee: Solar Wide Industrial LimitedInventors: Hughes Sanoner, Desmond Wai Nang Tse, Lawrence Chi Hang Chan
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Publication number: 20090067165Abstract: A canopy lighting device comprising a body having a light source and a base that magnetically couples to the body. The body and the base can be located on opposite sides of a fabric sheet to magnetically clamp the lighting device to the fabric sheet. The base may have an energy source, first electrical connection features coupled electrically to the energy source, and first magnetic connection features. The body may have a light source, second magnetic connection features for cooperating with the first magnetic connection features to clamp the body to the base, and second electrical connection features. The second electrical connection features cooperate with the first electrical connection features of the base when the body and the base are clamped together.Type: ApplicationFiled: September 7, 2007Publication date: March 12, 2009Applicant: SOLAR WIDE INDUSTRIAL LTD.Inventors: Hughes Sanoner, Desmond Wai Nang Tse, Lawrence Chi Hang Chan
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Patent number: 7495455Abstract: A multiple sensitivity stud sensing device for determining a location of objects behind a wall lining has a housing with a surface for moving over the wall lining. Within the housing are a capacitive sensor with first and second capacitances located adjacent the surface and control circuitry. The control circuitry includes a detecting circuit connected to the sensor for providing a detection signal related to an imbalance between the first and second capacitances, and a processor for receiving the detection signals and providing a display signal. A display is located on the housing for indicating location of an object behind the wall lining. The processor compares a detection signal to stored predetermined threshold values of detection signals associated with different wall lining thicknesses and displays a thickness value to the user.Type: GrantFiled: March 28, 2007Date of Patent: February 24, 2009Assignee: Solar Wide Industrial LimitedInventors: Hughes Sanoner, Desmond Wai Nang Tse, Lawrence Chi Hang Chan
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Publication number: 20080272761Abstract: A metal detector for detecting the presence of a ferrite object in the proximity of inductively coupled sensor having overlapping D shaped transmitter and receiver coils. The metal detector has a phase shift circuit to phase shifting a sensor output signal by a known amount and a switch operating in synchronisation with an excitation signal of the sensor for sampling the amplitude of the phase shifted output signal.Type: ApplicationFiled: August 23, 2007Publication date: November 6, 2008Applicant: SOLAR WIDE INDUSTRIAL LTD.Inventors: Hughes Sanoner, Desmond Wai Nang Tse, Lawrence Chi Hang Chan
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Publication number: 20080238403Abstract: A sensing device having a sensing surface for placing against a wall for detecting objects behind a wall lining has first and second sensors, each sensor including at least first and second capacitor plates and associated resistors forming RC circuits having time constants dependent on the adjacent wall material. Detection circuits connected to the RC circuits provide first and second voltage signals having amplitudes dependent on capacitance changes. A processor effects a comparison of the first and second voltage signals, and compares them to establish the magnitude of the voltage difference between the voltage signals, indicating a detected object center position when the difference signal is less than a predetermined value.Type: ApplicationFiled: March 28, 2007Publication date: October 2, 2008Applicant: SOLAR WIDE INDUSTRIAL LIMITEDInventors: Hughes SANONER, Desmond Wai Nang TSE, Lawrence Chi Hang CHAN