Patents by Inventor David Forsythe
David Forsythe 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: 9130376Abstract: A system and method for externally controlling the charging of a battery powered mobile computing device includes a charging unit configured to be electrically coupled to the mobile computing device to charge a battery therein. The charging unit comprises a charger configured to operate in a first mode to provide a constant charge current to the battery to be charged and to operate in a second mode to provide a constant charge voltage to the battery to be charged and where the switch from the first mode to the second mode occurs when the voltage at the battery a predefined threshold voltage. The charger including an offset compensator configured for applying an offset voltage to the measured output of the charger to maintain the charger in the first mode to compensate for voltage drops between the charger and the battery thereby allowing the battery voltage to reach the threshold voltage.Type: GrantFiled: April 14, 2011Date of Patent: September 8, 2015Assignee: PSION INC.Inventor: Lawrence David Forsythe
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Patent number: 9093833Abstract: A power factor correction apparatus is retrofittable to an appliance having an inductive load. The apparatus includes a housing having an electrical socket on one side and an electrical plug on the other side. Inside the housing are a power factor correction circuit and a trigger circuit. The socket and plug are electrically coupled to each other by the trigger circuit which automatically couples the power factor correction circuit between the socket and the plug when current flowing to the appliance is sensed.Type: GrantFiled: December 5, 2008Date of Patent: July 28, 2015Assignee: POWER FACTOR CORRECTION LLCInventors: Richard Ellenbogen, David Forsythe
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Publication number: 20130038274Abstract: A system and method for externally controlling the charging of a battery powered mobile computing device includes a charging unit configured to be electrically coupled to the mobile computing device to charge a battery therein. The charging unit comprises a charger configured to operate in a first mode to provide a constant charge current to the battery to be charged and to operate in a second mode to provide a constant charge voltage to the battery to be charged and where the switch from the first mode to the second mode occurs when the voltage at the battery a predefined threshold voltage. The charger including an offset compensator configured for applying an offset voltage to the measured output of the charger to maintain the charger in the first mode to compensate for voltage drops between the charger and the battery thereby allowing the battery voltage to reach the threshold voltage.Type: ApplicationFiled: April 14, 2011Publication date: February 14, 2013Applicant: PSION INC.Inventor: Lawrence David Forsythe
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Publication number: 20110264933Abstract: A method and apparatus for power management in a handheld device having various power domains, including an attachable/detachable peripheral device. The power source has an available power amount. The method comprises receiving an indication of a power management event at the handheld device related to operation of a power domain, identifying a predetermined power signature associated with operation of the power domain, determining whether the available power amount is sufficient to operate the power domain in accordance with the predetermined power signature, reducing a power state of another functional upon determining that the available power is insufficient, and allocating the reduced power amount to the first power domain of the handheld device for operation according to the predetermined power signature.Type: ApplicationFiled: April 23, 2010Publication date: October 27, 2011Inventor: Lawrence David Forsythe
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Publication number: 20110264825Abstract: A computing device is configured to communicate with a peripheral via a connector having a predefined physical configuration and a predefined number of pins. The computing device comprising memory for storing instructions and a processor for executing the instructions. The instructions cause the processor to implement the following steps. Communication with the peripheral is initialized using a predefined initialization protocol via at least one predefined pin. Information relating to a pinout configuration defining a logical configuration of the pins is received from the peripheral. The pinout configuration is assigned to the pins. Communicating with the peripheral in commenced using the pinout configuration. A peripheral configured to communicate with the computing device and the methods for communicating there between are also described.Type: ApplicationFiled: April 23, 2010Publication date: October 27, 2011Inventors: Adrian Joseph Stagg, Lawrence David Forsythe, Don Hatch, Timothy Fraser Pearce
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Patent number: 7401162Abstract: A multi-protocol port interface coupled to a plurality of selectable circuits, each of the circuits being associated with an electrical interface standard and selectable via a mode-select input signal in order to facilitate communication with a peripheral device coupled to the port, the peripheral device having a circuit chosen from the plurality of selectable circuits and associated with an electrical interface standard.Type: GrantFiled: July 23, 2003Date of Patent: July 15, 2008Assignee: Psion Teklogix Inc.Inventors: Keith Baker, Lawrence David Forsythe, Marija Gajic-Mancic
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Patent number: 7000705Abstract: A hydraulically operated setting tool for use in setting a plug or other component in a wellbore, and which is responsive to a supply of input actuating pressure to actuate the tool. An elongate tool housing has an inlet to receive the supply of actuating pressure, and an actuator element is axially displaceable relative to housing and also engageable with the plug or other component to set and release the component with respect to the wellbore. A pressure multiplier arrangement includes a hydraulically operated low pressure and high volume output piston which performs initial loading of the tool, and a high pressure, low volume output piston which provides a multiplied hydraulic force applied to the actuator element to set the plug or other component in a required position in the wellbore.Type: GrantFiled: November 5, 2001Date of Patent: February 21, 2006Assignee: Omega Completion Technology LimitedInventors: Mark Buyers, David Forsythe, Simon Benedict Fraser
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Publication number: 20050114239Abstract: Methods and systems for reconciling firm account data and exchange account data are provided. Firm account data and exchange account data are compared and discrepancies are displayed on a display device. A user may receive additional information about the data that does not match by selecting appropriate hyperlinks or other navigational items. The user may also enter adjustments.Type: ApplicationFiled: November 24, 2003Publication date: May 26, 2005Applicant: CARGILL, INC.Inventors: Bernadette Fiascone, David Forsythe, Chris Mayeda, Anupam Srivastava
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Publication number: 20040045724Abstract: A hydraulically operated setting tool for use in setting a plug or other component in a wellbore, and which is responsive to a supply of input actuating pressure to actuate the tool. An elongate tool housing has an inlet to receive the supply of actuating pressure, and an actuator element is axially displaceable relative to housing and also engageable with the plug or other component to set and release the component with respect to the wellbore. A pressure multiplier arrangement includes a hydraulically operated low pressure and high volume output piston which performs initial loading of the tool, and a high pressure, low volume output piston which provides a multiplied hydraulic force applied to the actuator element to set the plug or other component in a required position in the wellbore.Type: ApplicationFiled: September 3, 2003Publication date: March 11, 2004Inventors: Mark Buyers, David Forsythe, Simon Benedict Fraser
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Patent number: 6543541Abstract: A method for controlling entry from a main bore of a casing into a lateral bore of a producing well which incorporates (i) means for surface-actuated flow control in the lateral bore (ii) a flow control means located in the casing adjacent to the lateral bore, and said method comprising the steps of: a) removing the flow control means when entry to the lateral bore is required, said flow control means having an internal passage allowing upward flow of produced fluid from the main bore and through said passage; b) mounting a locating nipple on the casing adjacent to the lateral bore; c) engaging the flow control means with the nipple to locate the flow control means in the casing; and d) providing diverter means in the casing which engages with and is orientable relative to the nipple and operates to guide entry to the lateral bore from above the nipple following removal of said flow control means.Type: GrantFiled: February 5, 2001Date of Patent: April 8, 2003Assignee: Omega Completion Technology LimitedInventors: Mark Buyers, David Forsythe
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Publication number: 20020112866Abstract: A self-resetting impact device for use in a wellbore in order to jar a downhole tool or piece of equipment, said mechanism being attachable to a line e.g. a wireline so as to be lowerable to a required location in the wellbore, and said device comprising: means for attaching the device to a line; a housing; a hammer rod slidable relative to the housing in order to carry out a hammer stroke so as to apply an impact load; a releasable lock for holding the housing and the rod in a predetermined relative position, said lock being releasable upon application of a predetermined upward load to the device via said line so that a hammer stroke can take place; and, a reset arrangement for returning the body and the housing to the predetermined position after completion of the hammer stroke.Type: ApplicationFiled: February 16, 2001Publication date: August 22, 2002Inventors: Mark Buyers, Simon Benedict Fraser, David Forsythe
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Publication number: 20020104659Abstract: A method for controlling entry from a main bore of a casing into a lateral bore of a producing well which incorporates (i) means for surface-actuated flow control in the lateral bore (ii) a flow control means located in the casing adjacent to the lateral bore, and said method comprising the steps of:Type: ApplicationFiled: February 5, 2001Publication date: August 8, 2002Inventors: Mark Buyers, David Forsythe