1
Mario M Bilac, John J Dougherty, Indrajit Purkayastha, William J Premerlani: Circuit breaker and protective relay unit. General Electric Company, Richard A Menelly, Walter C Bernkopf, Fred Jacob, June 9, 1987: US04672501 (220 worldwide citation)

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 ...


2
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: Power management control system. General Electric Company, Carl B Horton, January 19, 1999: US05862391 (168 worldwide citation)

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, a ...


3
Esteban Santos, Hanns P Sailer, Paul H Singer, Indrajit Purkayastha: Digital circuit interrupter with battery back-up facility. General Electric Company, Richard A Menelly, January 16, 1996: US05485343 (44 worldwide citation)

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 o ...


4
Thomas D Burton, Indrajit Purkayastha: Test kit for a circuit breaker containing an electronic trip unit. General Electric Company, Richard A Menelly, Walter C Bernkopf, Fred Jacob, March 21, 1989: US04814712 (35 worldwide citation)

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 ...


5
Indrajit Purkayastha: Electronic control module for motor controller units. General Electric Company, Richard A Menelly, Carl B Horton, August 12, 1997: US05657193 (15 worldwide citation)

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 ...


6
David Fletcher, Gregory Lavoie, Indrajit Purkayastha: Method and devices for wireless communication between test and control devices and power distribution devices. General Electric Company, Cantor Colburn, March 15, 2005: US06868349 (13 worldwide citation)

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 ...


7
Indrajit Purkayastha, Clinton K Martin: Multiple circuit interrupter address identification system. General Electric Company, Richard A Menelly, Walter C Bernkopf, Fred Jacob, September 24, 1991: US05051861 (9 worldwide citation)

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 interr ...


8
Indrajit Purkayastha, Michael John Tirozzi, Jason R Smith, Kimberly Susanne Monti: Mobile inspection robot. iRobot Corporation, Honigman Miller Schwartz and Cohn, October 11, 2016: US09463574 (2 worldwide citation)

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 arbitratio ...


9
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, SS 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: Man machine interface for power management control systems. Cantor Colburn, February 27, 2003: US20030040897-A1 (1 worldwide citation)

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 dat ...


10
David Fletcher, Gregory Lavoie, Indrajit Purkayastha: Method and devices for wireless communication between test and control devices and power distribution devices. Cantor Colburn, October 9, 2003: US20030191589-A1

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 ...