Patents by Inventor Douglas M. Hamilton
Douglas M. Hamilton 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: 11363688Abstract: Lighting systems and methods implementing toggle control are provided. In one example implementation, a lighting system can include a first LED array having one or more LED devices and a second LED array having one or more LED devices. The system can further include a single throw circuit interrupter configured to receive power from a power source. The system can further include a power conversion circuit configured to convert an input power received via the toggle switch to a power output for the first LED array and the second LED array. The power conversion circuit can be configured to control a power distribution ratio between the first LED array and the second LED array based at least in part on a detected toggle input (e.g., a toggle pattern) implemented using the single throw circuit interrupter.Type: GrantFiled: January 26, 2021Date of Patent: June 14, 2022Assignee: Hubbell Lighting, Inc.Inventors: Pritam Yadav, T. Warren Weeks, Jr., Douglas M. Hamilton
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Patent number: 11272594Abstract: Multisource LED systems for providing high intensity narrow spectrum light are provided. In one example embodiment, a lighting system includes one or more first light sources configured to emit high intensity narrow spectrum (HINS) light. The lighting system can include one or more second light sources configured to emit non-HINS light. The system can include a power circuit configured to provide power to the one or more first light sources and the one or more second light sources.Type: GrantFiled: October 30, 2017Date of Patent: March 8, 2022Assignee: Hubbell IncorporatedInventors: Pritam Yadav, Douglas M. Hamilton, Christopher Lane Bailey
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Publication number: 20210153317Abstract: Lighting systems and methods implementing toggle control are provided. In one example implementation, a lighting system can include a first LED array having one or more LED devices and a second LED array having one or more LED devices. The system can further include a single throw circuit interrupter configured to receive power from a power source. The system can further include a power conversion circuit configured to convert an input power received via the toggle switch to a power output for the first LED array and the second LED array. The power conversion circuit can be configured to control a power distribution ratio between the first LED array and the second LED array based at least in part on a detected toggle input (e.g., a toggle pattern) implemented using the single throw circuit interrupter.Type: ApplicationFiled: January 26, 2021Publication date: May 20, 2021Inventors: Pritam Yadav, T. Warren Weeks, JR., Douglas M. Hamilton
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Patent number: 10912173Abstract: Lighting systems and methods implementing toggle control are provided. In one example implementation, a lighting system includes a first LED array having one or more LED devices and a second LED array having one or more LED devices. The system further includes a single throw circuit interrupter configured to receive power from a power source. The system further includes a power conversion circuit configured to convert an input power received via the toggle switch to a power output for the first LED array and the second LED array. The power conversion circuit is configured to control a power distribution ratio between the first LED array and the second LED array based at least in part on a detected toggle input (e.g., a toggle pattern) implemented using the single throw circuit interrupter.Type: GrantFiled: December 26, 2019Date of Patent: February 2, 2021Assignee: Hubbell IncorporatedInventors: Pritam Yadav, T. Warren Weeks, Jr., Douglas M. Hamilton
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Publication number: 20200137850Abstract: Lighting systems and methods implementing toggle control are provided. In one example implementation, a lighting system includes a first LED array having one or more LED devices and a second LED array having one or more LED devices. The system further includes a single throw circuit interrupter configured to receive power from a power source. The system further includes a power conversion circuit configured to convert an input power received via the toggle switch to a power output for the first LED array and the second LED array. The power conversion circuit is configured to control a power distribution ratio between the first LED array and the second LED array based at least in part on a detected toggle input (e.g., a toggle pattern) implemented using the single throw circuit interrupter.Type: ApplicationFiled: December 26, 2019Publication date: April 30, 2020Inventors: Pritam Yadav, T. Warren Weeks, JR., Douglas M. Hamilton
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Patent number: 10524324Abstract: Lighting fixtures and methods for controlling operation of lighting fixtures are provided. In one example implementation, a lighting fixture includes a first LED array associated with a first color temperature, and a second LED array associated with a second color temperature. The lighting fixture further includes a circuit configured to adjust a power distribution amongst the first LED array and the second LED array based at least in part on a detected toggle input to adjust a color temperature of light output by the lighting fixture.Type: GrantFiled: January 11, 2019Date of Patent: December 31, 2019Assignee: Hubbell IncorporatedInventors: Pritam Yadav, T. Warren Weeks, Jr., Douglas M. Hamilton
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Patent number: 10321536Abstract: A method of controlling a correlated color temperature for light output by a lighting device including a dim-to-warm circuit having a first light channel and a second light channel. The method including determining a light control value based on the measured current value. The method further including using the light control value, determining a first current value for applying a first current to the first light channel and determining a second current value for applying a second current to the second light channel; and providing the first current to the first light channel and providing the second current to the second light channel.Type: GrantFiled: June 13, 2017Date of Patent: June 11, 2019Assignee: Hubbell IncorporatedInventors: Douglas M. Hamilton, Anthony M. Mackey
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Publication number: 20190150246Abstract: Lighting systems and methods implementing toggle control are provided. In one example implementation, a lighting system includes a first LED array having one or more LED devices and a second LED array having one or more LED devices. The system further includes a single throw circuit interrupter configured to receive power from a power source. The system further includes a power conversion circuit configured to convert an input power received via the toggle switch to a power output for the first LED array and the second LED array. The power conversion circuit is configured to control a power distribution ratio between the first LED array and the second LED array based at least in part on a detected toggle input (e.g., a toggle pattern) implemented using the single throw circuit interrupter.Type: ApplicationFiled: January 11, 2019Publication date: May 16, 2019Inventors: Pritam Yadav, T. Warren Weeks, JR., Douglas M. Hamilton
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Patent number: 10187951Abstract: Lighting systems and methods implementing toggle control are provided. In one example implementation, a lighting system includes a first LED array having one or more LED devices and a second LED array having one or more LED devices. The system further includes a single throw circuit interrupter configured to receive power from a power source. The system further includes a power conversion circuit configured to convert an input power received via the toggle switch to a power output for the first LED array and the second LED array. The power conversion circuit is configured to control a power distribution ratio between the first LED array and the second LED array based at least in part on a detected toggle input (e.g., a toggle pattern) implemented using the single throw circuit interrupter.Type: GrantFiled: January 19, 2018Date of Patent: January 22, 2019Assignee: HUBBELL INCORPORATEDInventors: Pritam Yadav, T. Warren Weeks, Jr., Douglas M. Hamilton
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Patent number: 10009972Abstract: Multiphase lighting fixtures having one or more light emitting diode (LED) light sources are provided. In one example implementation, a light fixture includes one or more light sources, such as LED light sources and a power conversion circuit. The power conversion circuit includes a phase shifting transformer for implementing a phase shift between output phases of secondary windings thereof, a multi-phase rectifier having a first rectifier and a second rectifier connected in parallel for converting a multiphase input power to a rectified output or a six-pulse configuration, a zero sequence blocking transformer for reducing harmonic distortion, an interphase transformer for further reducing harmonic distortion, and a current regulator for providing a constant DC current output to the one or more light sources. In some example implementations, the DC rectified output has a voltage ripple of less than about 7%, or less than about 3%.Type: GrantFiled: February 8, 2017Date of Patent: June 26, 2018Assignee: Hubbell IncorporatedInventors: Thomas N. Clawson, Jr., T. Warren Weeks, Jr., Chris Bailey, Douglas M. Hamilton
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Publication number: 20180146527Abstract: Lighting systems and methods implementing toggle control are provided. In one example implementation, a lighting system includes a first LED array having one or more LED devices and a second LED array having one or more LED devices. The system further includes a single throw circuit interrupter configured to receive power from a power source. The system further includes a power conversion circuit configured to convert an input power received via the toggle switch to a power output for the first LED array and the second LED array. The power conversion circuit is configured to control a power distribution ratio between the first LED array and the second LED array based at least in part on a detected toggle input (e.g., a toggle pattern) implemented using the single throw circuit interrupter.Type: ApplicationFiled: January 19, 2018Publication date: May 24, 2018Inventors: Pritam Yadav, T. Warren Weeks, Jr., Douglas M. Hamilton
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Publication number: 20180117193Abstract: Multisource LED systems for providing high intensity narrow spectrum light are provided. In one example embodiment, a lighting system includes one or more first light sources configured to emit high intensity narrow spectrum (HINS) light. The lighting system can include one or more second light sources configured to emit non-HINS light. The system can include a power circuit configured to provide power to the one or more first light sources and the one or more second light sources.Type: ApplicationFiled: October 30, 2017Publication date: May 3, 2018Inventors: Pritam Yadav, Douglas M. Hamilton, Christopher Lane Bailey
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Patent number: 9907134Abstract: Lighting systems and methods implementing toggle control are provided. In one example implementation, a lighting system includes a first LED array having one or more LED devices and a second LED array having one or more LED devices. The system further includes a single throw circuit interrupter configured to receive power from a power source. The system further includes a power conversion circuit configured to convert an input power received via the toggle switch to a power output for the first LED array and the second LED array. The power conversion circuit is configured to control a power distribution ratio between the first LED array and the second LED array based at least in part on a detected toggle input (e.g., a toggle pattern) implemented using the single throw circuit interrupter.Type: GrantFiled: February 10, 2017Date of Patent: February 27, 2018Assignee: Hubbell IncorporatedInventors: Pritam Yadav, T. Warren Weeks, Jr., Douglas M. Hamilton
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Publication number: 20170280529Abstract: A method of controlling a correlated color temperature for light output by a lighting device including a dim-to-warm circuit having a first light channel and a second light channel. The method including determining a light control value based on the measured current value. The method further including using the light control value, determining a first current value for applying a first current to the first light channel and determining a second current value for applying a second current to the second light channel; and providing the first current to the first light channel and providing the second current to the second light channel.Type: ApplicationFiled: June 13, 2017Publication date: September 28, 2017Inventors: Douglas M. Hamilton, Anthony M. Mackey
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Patent number: 9763298Abstract: Systems and methods for balancing voltage in LED circuits are provided. An LED circuit can have a plurality of LED strings coupled in parallel with one another. Each LED string can include a plurality of LED devices coupled in series. The LED strings can receive a driver current from a driver circuit. According to example embodiments of the present disclosure, at least one of the plurality of LED strings can include a constant current regulator circuit coupled in series with the LED string. The constant current regulator circuit can provide a constant current through the LED string. The balance or remainder of the driver current can be provided to the other LED string. The constant current regulator circuit can provide for voltage balancing among the plurality of parallel LED strings.Type: GrantFiled: March 24, 2015Date of Patent: September 12, 2017Assignee: Hubbell IncorporatedInventors: T. Warren Weeks, Jr., Thomas N. Clawson, Douglas M. Hamilton
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Publication number: 20170231055Abstract: Lighting systems and methods implementing toggle control are provided. In one example implementation, a lighting system can include a first LED array having one or more LED devices and a second LED array having one or more LED devices. The system can further include a single throw circuit interrupter configured to receive power from a power source. The system can further include a power conversion circuit configured to convert an input power received via the toggle switch to a power output for the first LED array and the second LED array. The power conversion circuit can be configured to control a power distribution ratio between the first LED array and the second LED array based at least in part on a detected toggle input (e.g., a toggle pattern) implemented using the single throw circuit interrupter.Type: ApplicationFiled: February 10, 2017Publication date: August 10, 2017Inventors: Pritam Yadav, T. Warren Weeks, JR., Douglas M. Hamilton
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Publication number: 20170231049Abstract: Multiphase lighting fixtures having one or more light emitting diode (LED) light sources are provided. In one example implementation, a light fixture includes one or more light sources, such as LED light sources. The light fixture includes a power conversion circuit. The power conversion circuit can be configured to receive a multiphase input power comprising three or more alternating current (AC) phases. The power conversion circuit can be further configured to convert the multiphase input power to rectified output for powering the one or more light sources. In some example implementations, the DC rectified output can have a voltage ripple of less than about 7%, such as less than about 3%.Type: ApplicationFiled: February 8, 2017Publication date: August 10, 2017Inventors: Thomas N. Clawson, JR., T. Warren Weeks, JR., Chris Bailey, Douglas M. Hamilton
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Patent number: 9681517Abstract: A method of controlling a correlated color temperature for light output by a lighting device including a dim-to-warm circuit having a first light channel and a second light channel. The method including receiving a current input; measuring current of the current input to obtain a measured current value; and determining a light control value based on the measured current value. The method further including using the light control value, determining a first current value for applying a first current to the first light channel and determining a second current value for applying a second current to the second light channel; and providing the first current to the first light channel and providing the second current to the second light channel to obtain different desired correlated color temperatures for the light output at different ones of the light control values.Type: GrantFiled: April 14, 2016Date of Patent: June 13, 2017Assignee: Hubbell IncorporatedInventors: Douglas M. Hamilton, Anthony M. Mackey
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Publication number: 20160309561Abstract: A method of controlling a correlated color temperature for light output by a lighting device including a dim-to-warm circuit having a first light channel and a second light channel. The method including receiving a current input; measuring current of the current input to obtain a measured current value; and determining a light control value based on the measured current value. The method further including using the light control value, determining a first current value for applying a first current to the first light channel and determining a second current value for applying a second current to the second light channel; and providing the first current to the first light channel and providing the second current to the second light channel to obtain different desired correlated color temperatures for the light output at different ones of the light control values.Type: ApplicationFiled: April 14, 2016Publication date: October 20, 2016Inventors: Douglas M. Hamilton, Anthony M. Mackey
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Publication number: 20160286615Abstract: Systems and methods for balancing voltage in LED circuits are provided. An LED circuit can have a plurality of LED strings coupled in parallel with one another. Each LED string can include a plurality of LED devices coupled in series. The LED strings can receive a driver current from a driver circuit. According to example embodiments of the present disclosure, at least one of the plurality of LED strings can include a constant current regulator circuit coupled in series with the LED string. The constant current regulator circuit can provide a constant current through the LED string. The balance or remainder of the driver current can be provided to the other LED string. The constant current regulator circuit can provide for voltage balancing among the plurality of parallel LED strings.Type: ApplicationFiled: March 24, 2015Publication date: September 29, 2016Inventors: T. Warren Weeks, JR., Thomas N. Clawson, Douglas M. Hamilton