Patents by Inventor Indrajit Purkayastha

Indrajit Purkayastha 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: 9463574
    Abstract: A mobile inspection robot that includes a robot body and a drive system supporting the robot body and configured to maneuver the robot over a work surface. A controller communicates with the drive system and a sensor system. The controller executes a control system that includes a control arbitration system and a behavior system in communication with each other. The behavior system executes an inspection behavior, the inspection behavior influencing execution of commands by the control arbitration system based on sensor signals received from the sensor system to identify and inspect electrical equipment.
    Type: Grant
    Filed: February 13, 2013
    Date of Patent: October 11, 2016
    Assignee: iRobot Corporation
    Inventors: Indrajit Purkayastha, Michael John Tirozzi, Jason R. Smith, Kimberly Susanne Monti
  • Publication number: 20140069171
    Abstract: A method and instrument is provided that includes a flexible stick that is adjustable for different heights. The method and instrument includes one or more sensor modules coupled to the flexible stick. The method and instrument includes one or more control systems that establish different thresholds for the one or more sensor modules at different heights. The one or more control systems monitors a plurality of environmental parameters in a predetermined sequence and indicates whether at least one environmental parameter is below, within, or above the thresholds of a plurality of set-points through a display indicator.
    Type: Application
    Filed: September 9, 2013
    Publication date: March 13, 2014
    Applicant: Purkay Laboratories, Inc.
    Inventor: Indrajit Purkayastha
  • Publication number: 20130231779
    Abstract: A mobile inspection robot that includes a robot body and a drive system supporting the robot body and configured to maneuver the robot over a work surface. A controller communicates with the drive system and a sensor system. The controller executes a control system that includes a control arbitration system and a behavior system in communication with each other. The behavior system executes an inspection behavior, the inspection behavior influencing execution of commands by the control arbitration system based on sensor signals received from the sensor system to identify and inspect electrical equipment.
    Type: Application
    Filed: February 13, 2013
    Publication date: September 5, 2013
    Applicant: iRobot Corporation
    Inventors: Indrajit Purkayastha, Michael John Tirozzi, Jason R. Smith, Kimberly Susanne Monti
  • Patent number: 6868349
    Abstract: A wireless system is provided which comprises a test and control device, and a power distribution device. The test and control device has a first microprocessor executing a first firmware. The power distribution device has a second microprocessor executing a second firmware. The first microprocessor is coupled a first wireless communications port, and the second microprocessor is coupled to a second wireless communication port. The first and second wireless communication ports are configured to communicate wireless communications there between.
    Type: Grant
    Filed: April 4, 2002
    Date of Patent: March 15, 2005
    Assignee: General Electric Company
    Inventors: David Fletcher, Gregory Lavoie, Indrajit Purkayastha
  • Publication number: 20030191589
    Abstract: A wireless system is provided which comprises a test and control device, and a power distribution device. The test and control device has a first microprocessor executing a first firmware. The power distribution device has a second microprocessor executing a second firmware. The first microprocessor is coupled a first wireless communications port, and the second microprocessor is coupled to a second wireless communication port. The first and second wireless communication ports are configured to communicate wireless communications there between.
    Type: Application
    Filed: April 4, 2002
    Publication date: October 9, 2003
    Inventors: David Fletcher, Gregory Lavoie, Indrajit Purkayastha
  • Publication number: 20030040897
    Abstract: A power management and control system having a dynamic data exchange (DDE) server simulator for simulating supervisory management and control of electrical distribution systems is presented. The DDE server simulator is an alternative DDE server which simulates device values rather than acquiring data from real devices. The DDE server simulator generates and calculates device data from user generated electrical property profiles and updates DDE compliant clients. The DDE server simulator accepts the actual topics and item names and power profiles are user configurable with an option to apply white noise to the data, which provides true-to-life values to the user. These simulated measured values are used to calculate derived parameters and pre-set arrays provide wave form data in the proper format. Device events and trips can be interjected by the user and properly interpreted by the simulator. The data is passed to the clients via DDE.
    Type: Application
    Filed: March 8, 2001
    Publication date: February 27, 2003
    Inventors: Thomas Andrew Murphy, Kelley E. Gourley, Cliff John Winkel, Brett William Bolte, Veronica Kertesz, Donald S. Whitehead, James Burke, Harshad Tanna, Subhash Garg, A. Rajeshwar Rao, S.S. Lakshmi, Sudhir Mishra, J. Lakshminarayana, Pradeep Kumar Tamanna, B. Ravi Kumar, M. Kailashnath, Patrick G. Salas, Donald Richard Brown, Jose Bscheider, Grady W. Broadnax, Edgar Yee, Mary A. Doddy, Indrajit Purkayastha, Sara Simplot, Dana Foster, John S. Vandevanter, Wolfgang Meyer-Haack
  • Patent number: 5862391
    Abstract: The power management control system comprises a computer having standard RS485 interface cards and adapters installed in its I/O slots defining multiple industry standard Modbus RTU networks. The computer contains software for monitoring and controlling selected aspects of power usage/consumption, as described in more detail hereinafter. The Modbus RTU protocol is a well known industry standard. Devices with a Modbus RTU interface can be connected directly to the Modbus and other devices which communicate on the Commnet protocol require a Modbus concentrator. The Modbus concentrator provides an interface between the Modbus RTU protocol and the Commnet protocol, whereby these other devices can communicate through the Modbus concentrator over the Modbus. Alternatively, standard Ethernet interface cards and adapters are installed in the computer's I/O slots defining multiple standard Ethernet TCP/IP networks.
    Type: Grant
    Filed: April 3, 1996
    Date of Patent: January 19, 1999
    Assignee: General Electric Company
    Inventors: Patrick G. Salas, Donald R. Brown, Jose Bscheider, Thomas A. Murphy, Grady W. Broadnax, Jr., Edgar Yee, Mary A. Doddy, Veronica Kertesz, Indrajit Purkayastha, Sara Uecker, James Burke, Dana Foster, John S. Vandevanter, Wolfgang Meyer-Haack
  • Patent number: 5657193
    Abstract: A motor controller unit that employs standard motor contactors and electronic circuit breakers includes an electronic control module (ECM) for interfacing with the contactors and circuit breakers. Electrical connection with the circuit breaker electronic trip unit and the ECM is made by means of the circuit breaker rating plug. Electrical connection with the contactors and the ECM is made by means of externally-accessible terminal screws.
    Type: Grant
    Filed: January 26, 1996
    Date of Patent: August 12, 1997
    Assignee: General Electric Company
    Inventor: Indrajit Purkayastha
  • Patent number: 5485343
    Abstract: A digital circuit interrupter utilizing current transformers for operating power is provided with a re-chargeable battery to power-up the trip unit as well as to power the display after an overcurrent trip occurrence to enable an operator to determine both the magnitude as well as the cause of the overcurrent condition.
    Type: Grant
    Filed: February 22, 1994
    Date of Patent: January 16, 1996
    Assignee: General Electric Company
    Inventors: Esteban Santos, Hanns P. Sailer, Paul H. Singer, Indrajit Purkayastha
  • Patent number: 5051861
    Abstract: Low voltage electric switchgear equipment includes a central programmer unit electrically interconnected with electronic main and branch circuit interrupters within the same enclosure and used with a multi-phase power distribution circuit. Indicating diodes are arranged on each of the circuit interrupters for signaling the occurrence of an overcurrent condition. The same indicating diodes are arranged for responding to address commands generated by the field programmer as to the exact location of each circuit interrupter within the enclosure.
    Type: Grant
    Filed: January 9, 1990
    Date of Patent: September 24, 1991
    Assignee: General Electric Company
    Inventors: Indrajit Purkayastha, Clinton K. Martin
  • Patent number: 4814712
    Abstract: A test kit for a digital and analog electronic circuit breaker determines the calibration and overcurrent response of the circuit breaker when connected within an electric power circuit. The test kit simulates an overcurrent condition and provides verification of the circuit breaker response without de-energizing the circuit breaker or interfering with the circuit breaker's protection functions. The test kit connects with the digital communications circuit within the digital circuit breaker to obtain status information concerning pick-up conditions, trip conditions and fault currents which are viewed on the test kit liquid crystal display. A ground fault suppression circuit is included within the test kit for single-phase current-injection without causing ground fault tripping. The test kit circuit further includes means for optionally tripping the circuit breaker upon completion of any of the tests.
    Type: Grant
    Filed: June 17, 1987
    Date of Patent: March 21, 1989
    Assignee: General Electric Company
    Inventors: Thomas D. Burton, Indrajit Purkayastha
  • Patent number: 4672501
    Abstract: Circuit protection and protective relay functions are provided by common circuit elements under the control of a single processor unit. Voltage and current values are obtained on a continuous basis and these values are continuously monitored within the processor to determine the electrical status of a protected power distribution system. Upon the occurrence of an overcurrent or undervoltage condition, the circuit is interrupted by operation of a circuit breaker trip solenoid causing the breaker contacts to open. When the overcurrent or undervoltage condition ceases to exist, the circuit breaker contacts could be closed by operation of a controlled relay. The ROM and RAM storage elements within the processor unit are continuously tested and the circuit breaker contacts are opened upon indication that the ROM or RAM element is nonfunctional.
    Type: Grant
    Filed: June 29, 1984
    Date of Patent: June 9, 1987
    Assignee: General Electric Company
    Inventors: Mario M. Bilac, John J. Dougherty, Indrajit Purkayastha, William J. Premerlani