| Patent | Date |
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Remote light indication fault indicator with a timed reset circuit and a manual reset circuit
Grant 6,479,981 - Schweitzer, Jr. , et al. November 12, 2 | 2002-11-12 |
Fault indicator providing light indication on fault detection
Grant 6,433,698 - Schweitzer, Jr. , et al. August 13, 2 | 2002-08-13 |
Waterproof current transformer
Grant 6,211,764 - Schweitzer, Jr. April 3, 2 | 2001-04-03 |
Remote light indication fault indicator with a timed reset circuit and a manual reset circuit
Grant 6,133,724 - Schweitzer, Jr. , et al. October 17, 2 | 2000-10-17 |
Fault indicator providing contact closure and light indication on fault detection
Grant 6,016,105 - Schweitzer, Jr. January 18, 2 | 2000-01-18 |
Fault indicator providing contact closure on fault detection
Grant 6,014,301 - Schweitzer, Jr. January 11, 2 | 2000-01-11 |
Clamping mechanism for mounting circuit condition monitoring devices on cables of various diameters
Grant 5,990,674 - Schweitzer, Jr. November 23, 1 | 1999-11-23 |
Test-point mounted fault indicator having immunity to fault currents in adjacent conductors
Grant 5,889,399 - Schweitzer, Jr. March 30, 1 | 1999-03-30 |
Bridged clamping mechanism for use with circuit condition monitoring devices
Grant 5,729,125 - Schweitzer, Jr. March 17, 1 | 1998-03-17 |
Fault indicator having auxiliary fault sensing winding
Grant 5,677,678 - Schweitzer, Jr. October 14, 1 | 1997-10-14 |
Fault indicator with optically-isolated remote readout circuit
Grant 5,420,502 - Schweitzer, Jr. May 30, 1 | 1995-05-30 |
Phase-to-phase voltage monitor for three-phase power distribution system
Grant 5,406,195 - Schweitzer, Jr. April 11, 1 | 1995-04-11 |
Voltage monitor for alternating current power system
Grant 5,363,088 - Schweitzer, Jr. November 8, 1 | 1994-11-08 |
Direction indicating fault indicators
Grant 5,220,311 - Schweitzer, Jr. June 15, 1 | 1993-06-15 |
Housing including biasing springs extending between clamp arms for cable mounted power line monitoring device
Grant 5,180,972 - Schweitzer, Jr. January 19, 1 | 1993-01-19 |
Circuit status indicator having liquid crystal display
Grant 5,095,265 - Schweitzer, Jr. March 10, 1 | 1992-03-10 |
High impedance voltage indicator having capacitive voltage divider
Grant 5,077,520 - Schweitzer, Jr. December 31, 1 | 1991-12-31 |
Fault indicator having liquid crystal status display
Grant 5,070,301 - Schweitzer, Jr. December 3, 1 | 1991-12-03 |
Battery-powered fault indicator
Grant 5,008,651 - Schweitzer, Jr. April 16, 1 | 1991-04-16 |
Circuit condition monitor with integrally molded test point socket and capacitive coupling
Grant 4,904,932 - Schweitzer, Jr. February 27, 1 | 1990-02-27 |
Electromechanical pulse counter
Grant 4,873,706 - Schweitzer, Jr. October 10, 1 | 1989-10-10 |
Fault indicator having delayed trip circuit
Grant 4,795,982 - Schweitzer, Jr. January 3, 1 | 1989-01-03 |
Circuit condition monitoring system having integral test point
Grant 4,794,331 - Schweitzer, Jr. December 27, 1 | 1988-12-27 |
Fault indicator having improved trip inhibit circuit
Grant 4,794,332 - Schweitzer, Jr. December 27, 1 | 1988-12-27 |
Cable mounted capacitively-coupled circuit condition indicating device
Grant 4,794,329 - Schweitzer, Jr. December 27, 1 | 1988-12-27 |
Voltage loss detector
Grant 4,714,916 - Schweitzer, Jr. December 22, 1 | 1987-12-22 |
Surge detector having distributed line inductance pickup
Grant 4,706,016 - Schweitzer, Jr. November 10, 1 | 1987-11-10 |
Fault indicator having trip inhibit circuit
Grant 4,686,518 - Schweitzer, Jr. August 11, 1 | 1987-08-11 |
Clamp mechanism for power line mounted monitoring device
Grant 4,646,006 - Schweitzer, Jr. February 24, 1 | 1987-02-24 |
Voltage loss sensor and alarm
Grant 4,550,288 - Schweitzer, Jr. October 29, 1 | 1985-10-29 |
Fault indicator with push button reset
Grant 4,536,758 - Schweitzer, Jr. August 20, 1 | 1985-08-20 |
Fault indicator with improved flag indicator assembly
Grant 4,495,489 - Schweitzer, Jr. January 22, 1 | 1985-01-22 |
Fault indicator having a remote test point at which fault occurrence is indicated by change in magnetic state
Grant 4,458,198 - Schweitzer, Jr. July 3, 1 | 1984-07-03 |
Cable mounted magnetic core assembly
Grant 4,456,873 - Schweitzer, Jr. June 26, 1 | 1984-06-26 |
Fault indicator with combined trip and reset winding
Grant 4,438,403 - Schweitzer, Jr. March 20, 1 | 1984-03-20 |
Fault indicator having increased sensitivity to fault currents
Grant 4,424,512 - Schweitzer, Jr. January 3, 1 | 1984-01-03 |
Ground fault indicator
Grant 4,414,543 - Schweitzer, Jr. November 8, 1 | 1983-11-08 |
Fault indicator with flux concentrating means
Grant 4,375,617 - Schweitzer, Jr. March 1, 1 | 1983-03-01 |
Test point mounted circuit condition indicator
Grant 4,263,550 - Schweitzer, Jr. * April 21, 1 | 1981-04-21 |
Combined fault and voltage indicator
Grant 4,251,770 - Schweitzer, Jr. February 17, 1 | 1981-02-17 |
Fault indicator responsive to flow of fault current in a conductor when power flow is in one direction only
Grant 4,063,171 - Schweitzer, Jr. December 13, 1 | 1977-12-13 |
Tool for manually tripping a fault indicator for high voltage electric power circuits and resetting same
Grant 4,045,726 - Schweitzer, Jr. August 30, 1 | 1977-08-30 |
Means for indicating abnormal high current flow in a high voltage electric power distribution conductor and for resetting and testing same
Grant 3,991,366 - Schweitzer, Jr. November 9, 1 | 1976-11-09 |
Fault indicator in test point cap
Grant 3,906,477 - Schweitzer, Jr. September 16, 1 | 1975-09-16 |
Tool For Manual Manipulation Of Devices For Application To And Removal From High Voltage Conductors
Grant 3,868,136 - Schweitzer, Jr. February 25, 1 | 1975-02-25 |
Indicating And Automatically Resettable System For Detection Of Fault Current Flow In A Conductor
Grant 3,816,816 - Schweitzer, Jr. June 11, 1 | 1974-06-11 |
Magnetic Core Structure
Grant 3,725,832 - Schweitzer, Jr. April 3, 1 | 1973-04-03 |
Alternating Current Fault Indicating Means
Grant 3,715,742 - Schweitzer, Jr. February 6, 1 | 1973-02-06 |
Signalling System Responsive To Fault On Electric Power Line
Grant 3,708,724 - Schweitzer, Jr. January 2, 1 | 1973-01-02 |
Current Measuring And Automatically Resettable Fault Indicating Means
Grant 3,702,966 - Schweitzer, Jr. November 14, 1 | 1972-11-14 |
Automatically Resettable Fault Indicator
Grant 3,676,740 - Schweitzer, Jr. July 11, 1 | 1972-07-11 |
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