Patents by Inventor John LiBretto
John LiBretto 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: 11916370Abstract: A circuit interrupter device for selectively connecting a source of AC power from a line side to a load side of the circuit interrupter device includes a controller powered from a source of AC power from a line side. The controller initializes a self-test and determines whether the self-test was successful. The controller outputs a self-test result signal. An electrically-held relay of the device, which is in communication with the controller and is powered from the line side, stays in an OFF state until the self-test result signal indicates the self-test was successful, and enters an ON state if the self-test was successful. When in the OFF state, a load side of the circuit interrupter device is not in electrical communication with the source of AC power, and when in the ON state, the load side is in electrical communication with the source of AC power.Type: GrantFiled: May 28, 2021Date of Patent: February 27, 2024Assignee: Leviton Manufacturing Co., Inc.Inventors: Michael Ostrovsky, John LiBretto
-
Publication number: 20220216687Abstract: A circuit interrupter device for selectively connecting a source of AC power from a line side to a load side of the circuit interrupter device includes a controller powered from a source of AC power from a line side. The controller initializes a self-test and determines whether the self-test was successful. The controller outputs a self-test result signal. An electrically-held relay of the device, which is in communication with the controller and is powered from the line side, stays in an OFF state until the self-test result signal indicates the self-test was successful, and enters an ON state if the self-test was successful. When in the OFF state, a load side of the circuit interrupter device is not in electrical communication with the source of AC power, and when in the ON state, the load side is in electrical communication with the source of AC power.Type: ApplicationFiled: May 28, 2021Publication date: July 7, 2022Inventors: Michael OSTROVSKY, John LIBRETTO
-
Patent number: 11105864Abstract: An arc fault circuit interrupter is disclosed. This arc fault circuit interrupter can include any one or more of three different sensors such as a high frequency sensor, and any one of lower frequency sensors such as a current sensor or a differential sensor. The arc fault circuit interrupter can be configured as an in line arc fault circuit interrupter installed in a wall box. In addition, the arc fault circuit interrupter can include a processor configured to determine any one of a series arc fault, or a parallel arc fault.Type: GrantFiled: July 29, 2019Date of Patent: August 31, 2021Assignee: Leviton Manufacturing Co., Inc.Inventors: Michael Ostrovsky, John Libretto, Ronald Jansen, Michael Kamor, Adam Kevelos
-
Publication number: 20190356127Abstract: An arc fault circuit interrupter is disclosed. This arc fault circuit interrupter can include any one or more of three different sensors such as a high frequency sensor, and any one of lower frequency sensors such as a current sensor or a differential sensor. The arc fault circuit interrupter can be configured as an in line arc fault circuit interrupter installed in a wall box. In addition, the arc fault circuit interrupter can include a processor configured to determine any one of a series arc fault, or a parallel arc fault.Type: ApplicationFiled: July 29, 2019Publication date: November 21, 2019Applicant: Leviton Manufacturing Company, Inc.Inventors: Michael OSTROVSKY, John LIBRETTO, Ronald JANSEN, Michael KAMOR, Adam KEVELOS
-
Patent number: 10367347Abstract: An arc fault circuit interrupter is disclosed. This arc fault circuit interrupter can include any one or more of three different sensors such as a high frequency sensor, and any one of lower frequency sensors such as a current sensor or a differential sensor. The arc fault circuit interrupter can be configured as an in line arc fault circuit interrupter installed in a wall box. In addition, the arc fault circuit interrupter can include a processor configured to determine any one of a series arc fault, or a parallel arc fault.Type: GrantFiled: January 6, 2017Date of Patent: July 30, 2019Assignee: Leviton Manufacturing Company, Inc.Inventors: Michael Ostrovsky, John Libretto, Ronald Jansen, Michael Kamor, Adam Kevelos
-
Publication number: 20170117699Abstract: An arc fault circuit interrupter is disclosed. This arc fault circuit interrupter can include any one or more of three different sensors such as a high frequency sensor, and any one of lower frequency sensors such as a current sensor or a differential sensor. The arc fault circuit interrupter can be configured as an in line arc fault circuit interrupter installed in a wall box. In addition, the arc fault circuit interrupter can include a processor configured to determine any one of a series arc fault, or a parallel arc fault.Type: ApplicationFiled: January 6, 2017Publication date: April 27, 2017Applicant: Leviton Manufacturing CompanyInventors: Michael OSTROVSKY, John LIBRETTO, Ronald JANSEN, Michael KAMOR, Adam KEVELOS
-
Patent number: 9608533Abstract: An apparatus to control an amount of current delivered from an AC power source to an electrical load includes a line terminal configured to be connected to the AC power source, a load terminal configured to be connected to the electrical load, a controllably conductive power switch in series electrical connection between the line terminal and the load terminal, and a switching circuit configured to control a conductive state of the controllably conductive power switch wherein the switching circuit is configured to automatically detect at least one electrical characteristic.Type: GrantFiled: December 23, 2013Date of Patent: March 28, 2017Assignee: LEVITON MANUFACTURING CO., INC.Inventors: Michael Ostrovsky, John LiBretto
-
Patent number: 9577420Abstract: An arc fault circuit interrupter is disclosed. This arc fault circuit interrupter can include any one or more of three different sensors such as a high frequency sensor, and any one of lower frequency sensors such as a current sensor or a differential sensor. The arc fault circuit interrupter can be configured as an in line arc fault circuit interrupter installed in a wall box. In addition, the arc fault circuit interrupter can include a processor configured to determine any one of a series arc fault, or a parallel arc fault.Type: GrantFiled: November 25, 2013Date of Patent: February 21, 2017Assignee: Leviton Manufacturing Company, Inc.Inventors: Michael Ostrovsky, John Libretto, Ronald Jansen, Michael Kamor, Adam Kevelos
-
Publication number: 20140218044Abstract: An arc fault circuit interrupter is disclosed. This arc fault circuit interrupter can include any one or more of three different sensors such as a high frequency sensor, and any one of lower frequency sensors such as a current sensor or a differential sensor. The arc fault circuit interrupter can be configured as an in line arc fault circuit interrupter installed in a wall box. In addition, the arc fault circuit interrupter can include a processor configured to determine any one of a series arc fault, or a parallel arc fault.Type: ApplicationFiled: November 25, 2013Publication date: August 7, 2014Applicant: Leviton Manufacturing CompanyInventors: Michael OSTROVSKY, John LIBRETTO, Ronald JANSEN, Michael KAMOR, Adam KEVELOS
-
Publication number: 20140111119Abstract: An apparatus to control an amount of current delivered from an AC power source to an electrical load includes a line terminal configured to be connected to the AC power source, a load terminal configured to be connected to the electrical load, a controllably conductive power switch in series electrical connection between the line terminal and the load terminal, and a switching circuit configured to control a conductive state of the controllably conductive power switch wherein the switching circuit is configured to automatically detect at least one electrical characteristic.Type: ApplicationFiled: December 23, 2013Publication date: April 24, 2014Applicant: Leviton Manufacturing Co., Inc.Inventors: Michael Ostrovsky, John LiBretto
-
Publication number: 20140049869Abstract: A circuit interrupter, such as a GFCI or AFCI product, is provided having a suppression and protection circuit and circuit interrupter circuitry. In one configuration, a semiconductor device and a voltage clamping device or surge protector, such as a metal oxide varistor (MOV), are utilized in the circuit interrupter for handling transient surges and overvoltage conditions. The semiconductor device, such as a SIDCA and a TVS diode, is connected to a solenoid or trip coil of the circuit interrupter circuitry to limit the amount of current through the semiconductor device. The MOV is placed between phase and neutral conductors of the circuit interrupter circuitry.Type: ApplicationFiled: October 30, 2013Publication date: February 20, 2014Applicant: Leviton Manufacturing Co., Inc.Inventors: Aleksandr Aronov, Michael Ostrovsky, John LiBretto
-
Patent number: 8618751Abstract: A method for determining a limit of a phase control power range includes applying a first gate pulse to a switch at a first firing angle near the limit of the power range, sensing the conductive state of the switch after the first gate pulse, and determining the limit of the power range in response to the conductive state of the switch. If the switch remains conductive after the first gate pulse, the first firing angle may be used as the limit of the power range. If the switch does not remain conductive after the first gate pulse, the limit may be determined by repeatedly incrementing the firing angle, applying a gate pulse to the switch at the incremented firing angle, and sensing the conductive state of the switch after each gate pulse until the switch is conductive after a gate pulse.Type: GrantFiled: December 30, 2009Date of Patent: December 31, 2013Assignee: Leviton Manufacturing Co., Inc.Inventors: Michael Ostrovsky, John LiBretto
-
Patent number: 8599523Abstract: An arc fault circuit interrupter is disclosed. This arc fault circuit interrupter can include any one or more of three different sensors such as a high frequency sensor, and any one of lower frequency sensors such as a current sensor or a differential sensor. The arc fault circuit interrupter can be configured as an in line arc fault circuit interrupter installed in a wall box. In addition, the arc fault circuit interrupter can include a processor configured to determine any one of a series arc fault, or a parallel arc fault.Type: GrantFiled: July 29, 2011Date of Patent: December 3, 2013Assignee: Leviton Manufacturing Company, Inc.Inventors: Michael Ostrovsky, John Libretto, Ronald Jansen, Michael Kamor, Adam Kevelos
-
Patent number: 8599522Abstract: A circuit interrupter, such as a GFCI or AFCI product, is provided having a suppression and protection circuit and circuit interrupter circuitry. In one configuration, a semiconductor device and a voltage clamping device or surge protector, such as a metal oxide varistor (MOV), are utilized in the circuit interrupter for handling transient surges and overvoltage conditions. The semiconductor device, such as a SIDCA and a TVS diode, is connected to a solenoid or trip coil of the circuit interrupter circuitry to limit the amount of current through the semiconductor device. The MOV is placed between phase and neutral conductors of the circuit interrupter circuitry.Type: GrantFiled: July 29, 2011Date of Patent: December 3, 2013Assignee: Leviton Manufacturing Co., Inc.Inventors: Aleksandr Aronov, Michael Ostrovsky, John LiBretto
-
Publication number: 20130027819Abstract: A circuit interrupter, such as a GFCI or AFCI product, is provided having a suppression and protection circuit and circuit interrupter circuitry. In one configuration, a semiconductor device and a voltage clamping device or surge protector, such as a metal oxide varistor (MOV), are utilized in the circuit interrupter for handling transient surges and overvoltage conditions. The semiconductor device, such as a SIDCA and a TVS diode, is connected to a solenoid or trip coil of the circuit interrupter circuitry to limit the amount of current through the semiconductor device. The MOV is placed between phase and neutral conductors of the circuit interrupter circuitry.Type: ApplicationFiled: July 29, 2011Publication date: January 31, 2013Applicant: Leviton Manufacturing Co., Inc.Inventors: Aleksandr Aronov, Michael Ostrovsky, John LiBretto
-
Publication number: 20110156610Abstract: A method for determining a limit of a phase control power range includes applying a first gate pulse to a switch at a first firing angle near the limit of the power range, sensing the conductive state of the switch after the first gate pulse, and determining the limit of the power range in response to the conductive state of the switch. If the switch remains conductive after the first gate pulse, the first firing angle may be used as the limit of the power range. If the switch does not remain conductive after the first gate pulse, the limit may be determined by repeatedly incrementing the firing angle, applying a gate pulse to the switch at the incremented firing angle, and sensing the conductive state of the switch after each gate pulse until the switch is conductive after a gate pulse.Type: ApplicationFiled: December 30, 2009Publication date: June 30, 2011Applicant: LEVITON MANUFACTURING CO., INC.Inventors: Michael Ostrovsky, John LiBretto
-
Patent number: 7375935Abstract: A ground fault circuit interrupter device having a feedthrough capacitor for substantially reducing interference from radio frequency signals such as those emitted from cell phones and 2-way radios. The ground fault circuit interrupter device includes a printed circuit board having a system ground terminal and a detection terminal for receiving a fault detection signal. A chip is provided having a ground pin connected to the system ground terminal and an input pin for receiving the fault detection signal. The feedthrough capacitor has a through conductor connected between the input pin and the detection terminal and a capacitor coupled between the through conductor and the system ground terminal.Type: GrantFiled: April 1, 2005Date of Patent: May 20, 2008Assignee: Leviton Manufacturing Co., Inc.Inventors: David Y. Chan, Eugene Shafir, John Libretto
-
Patent number: 7375871Abstract: A light control system having a full range of dimming for smart-glass by providing an interface between an off-the-shelf dimmer and a electrochromic glass device is disclosed herein. The light control system or electrochromic glass control device acts as an interface that converts an asymmetric alternating current (AC) power signal from the dimmer device into a symmetric, amplitude controlled AC output signal for controlling the tint of the smart-glass device. The electrochromic glass control device includes a powerline interface circuit that receives the asymmetric AC power signal from the dimmer. A controller connects to the powerline interface circuit to generate a control signal responsive to the asymmetric AC power signal. Connecting between the dimmer and the controller, an output stage generates the symmetrical AC output signal responsive to the control signal to control the electrochromic glass device.Type: GrantFiled: October 27, 2005Date of Patent: May 20, 2008Assignee: Leviton Manufacturing Co., Inc.Inventors: John Libretto, Michael Ostrovsky, Eugene Frid, Edward Uftring
-
Publication number: 20070097484Abstract: A light control system having a full range of dimming for smart-glass by providing an interface between an off-the-shelf dimmer and a electrochromic glass device is disclosed herein. The light control system or electrochromic glass control device acts as an interface that converts an asymmetric alternating current (AC) power signal from the dimmer device into a symmetric, amplitude controlled AC output signal for controlling the tint of the smart-glass device. The electrochromic glass control device includes a powerline interface circuit that receives the asymmetric AC power signal from the dimmer. A controller connects to the powerline interface circuit to generate a control signal responsive to the asymmetric AC power signal. Connecting between the dimmer and the controller, an output stage generates the symmetrical AC output signal responsive to the control signal to control the electrochromic glass device.Type: ApplicationFiled: October 27, 2005Publication date: May 3, 2007Inventors: John Libretto, Michael Ostrovsky, Eugene Frid, Edward Uftring
-
Patent number: RE42866Abstract: A ground fault circuit interrupter device having a feedthrough capacitor for substantially reducing interference from radio frequency signals such as those emitted from cell phones and 2-way radios. The ground fault circuit interrupter device includes a printed circuit board having a system ground terminal and a detection terminal for receiving a fault detection signal. A chip is provided having a ground pin connected to the system ground terminal and an input pin for receiving the fault detection signal. The feedthrough capacitor has a through conductor connected between the input pin and the detection terminal and a capacitor coupled between the through conductor and the system ground terminal.Type: GrantFiled: May 13, 2010Date of Patent: October 25, 2011Assignee: Leviton Manufacturing Co., Inc.Inventors: David Y. Chan, Eugene Shafir, John Libretto