Inventor

ELMS ROBERT T

US85 patents

⚠️ This page may combine multiple inventors who share the name “ELMS ROBERT T”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

ELMS ROBERT T

EATON CORP

Arc fault detection apparatus and circuit breaker incorporating same

Ground fault/arc fault circuit interrupter and method of testing the same with a test button and a reset button

Method and apparatus for determining frequency of an alternating current signal of an electric power system

Circuit interrupter with test actuator for ground fault and arc fault test mechanisms

Data collection and processing for digital AC power system monitor/analyzer

Energy monitoring system for a plurality of local stations with snapshot polling from a central station

Apparatus for harmonic analysis of waveforms in an AC electrical system

Apparatus for triggering alarms and waveform capture in an electric power system

Sure chip

Apparatus for generating a signal representative of total harmonic distortion in waveforms of an A/C electrical system

Testing device for detecting and locating arc faults in an electrical system

Universal power module

Calibration of microcomputer-based metering apparatus

Electrical switching apparatus and receptacle including automatic miswiring protection

Electrical switching apparatus including a second trip circuit responding to failure of a first trip circuit to provide a repetitive signal

Electrical contactor system with transfer of scaled overload information

Optically isolated pulse width modulation metering

Arc fault circuit interrupter

Arc fault circuit interrupter and method for disabling series arc protection during current transients

Arc fault circuit interrupter for a compressor load

Power circuit tester apparatus and method

Breaker failure annunciator system

ARC fault or ground fault or ARC fault/ground fault trip signal generator and trip unit employing the same

Sure chip

Low energy pulsing device and method for electrical system arc detection

Circuit interrupter including arc fault test and/or ground fault test failure indicator

Circuit interrupter including a shunt wire current sensor and a processor having a thermal overload predictive function

Arc fault circuit interrupter and method of parallel arc fault detection

Arc fault circuit interrupter and method for inhibiting series arc protection based on dimmer phase angle

Corded leakage-current detection and interruption apparatus

WESTINGHOUSE ELECTRIC CORP

Energy monitoring system for a plurality of local stations with snapshot polling from a central station

Sure chip plus

Bidirectional communication and control network with programmable microcontroller interfacing digital ICs transmitting in serial format to controlled product

Motor control apparatus with parallel input, serial output signal conditioning means

High accuracy AC electric energy metering system

Bus differential relay

Microcomputer controlled electric contactor with power loss memory

Bidirectional communication and control network with programmable microcontroller interfacing digital ICS and controlled product

Circuit interrupter with front panel numeric display

Circuit interrupter with digital trip unit and optically-coupled data input/output system

Circuit interrupter with digital trip unit and power supply

Ballast circuit for accurately regulating HID lamp wattage

Circuit interrupter with solid state digital trip unit and positive power-up feature

Circuit interrupter with digital trip unit and means to enter trip settings

Circuit interrupter with digital trip unit and potentiometers for parameter entry

Wide dynamic range current measuring apparatus

Master metering module with voltage selector

ABB POWER T & D CO

Systems for transmitting data via telephone lines

ELMS ROBERT T

Motor control apparatus with short term undervoltage motor mode saver

PHILIPS LIGHTING CORP

Method of operating HID sodium lamp to minimize lamp voltage variation throughout lamp life