William E Berkopec, 802395 Ann Rita Dr, Brookfield, WI 53045

6356423, Mar 12, 2002

Apr 26, 2000

09/558507

Jerome Kenneth Hastings - Sussex WI
Karen Sjaarda Bland - Milwaukee WI
James Edward Hansen - Oak Creek WI
Scott Anderson Reid - Brookfield WI
David James Gritter - Wauwatosa WI
Edward Louis Wellner - Colgate WI
Engelbert Hetzmannseder - Milwaukee WI
William Edward Berkopec - Wauwatosa WI
Birger Pahl - Milwaukee WI
Thomas Edward Strunsee - Milwaukee WI

Eaton Corporation - Cleveland OH

H02H 308

361 932, 361 94, 361 939

Electrical equipment is safeguarded from damage due to faults by a circuit that provides several levels of protection. A semiconductor switch and a current sensor are placed in series with the electrical equipment. When the current to the equipment exceeds a first threshold for a predefined period of time, the semiconductor switch is rendered non-conductive until the circuit is specifically reset. When the current to the equipment exceeds a greater second threshold, a pulsed signal alternately places the semiconductor switch in conductive and non-conductive states so that the average current applied to the equipment is within an acceptable level. Should the current exceed an even greater third threshold, the semiconductor switch is immediately rendered non-conductive until the circuit is manually reset.

6590757, Jul 8, 2003

Sep 28, 2001

09/967116

Birger Pahl - Milwaukee WI
Ronald R. Jahn - Cedarburg WI
William E. Berkopec - Wauwatosa WI
Slobodan Krstic - Brookfield WI
Joseph C. Zuercher - Brookfield WI
Jerome K. Hastings - Sussex WI

Eaton Corporation - Cleveland OH

H02N 308

361 932, 361 94, 361 939

Electrical equipment ( ) is safeguarded from damage due to parallel arc faults by a circuit that provides several levels of protection. A semiconductor switch ( ) and a current sensor ( ) are placed in series with the electrical equipment ( ). When the current to the equipment exceeds a first threshold for a predefined period of time, the semiconductor switch ( ) is rendered non-conductive until the circuit is specifically reset. When the current to the equipment exceeds a greater second threshold, a pulsed signal alternately places the semiconductor switch ( ) in conductive and non-conductive states so that the average current applied to the equipment ( ) is within an acceptable level. The pulses are measured to determine whether a parallel arc fault has occurred. When the measured pulses ( ) are within a predetermined range, a parallel arc fault is declared and the semiconductor switch ( ) is rendered non-conductive. Should the current exceed an even greater third threshold, the semiconductor switch ( ) is immediately rendered non-conductive until the circuit is manually reset.

4549122, Oct 22, 1985

Sep 14, 1983

6/532067

William E. Berkopec - Milwaukee WI
James A. Burns - Menomonee Falls WI

Allen-Bradley Company - Milwaukee WI

H02P 506

318338

A method and a circuit for motor field regulation in the constant horsepower speed range, wherein the weakening of field current allows operation of the motor at speeds higher than the base speed while maintaining rated armature voltage. The field current is weakened in response to speed feedback signals to provide a rapid response in controlling field current. The motor field is also regulated in response to a counter-EMF and IR compensation circuit to further weaken the field current, where the counter-EMF developed in the DC motor would cause excessive voltage across the armature.

6188552, Feb 13, 2001

Aug 7, 1998

9/130568

James R. Jaeschke - Waukesha WI
William E. Berkopec - Wauwatosa WI
David D. Shipp - Murrysville PA
Martin Baier - Cranberry Township PA

Eaton Corporation - Cleveland OH

H02H 316

361 48

A normally ungrounded power system for a oil well is provided which includes a power transformer above ground and a pump motor below ground. There is provided a signal system which includes a below ground sensor system and an above ground signal conditioning and monitoring unit where the sensor system utilizes the main power lines for carrying the sensor signals. A connectable high resistance grounding scheme is provided to the aforementioned floating system, so that in the event of a arcing ground fault or similar occurrence the system may be immediately grounded, thus compensating for the effects of the arcing ground fault and providing personnel safety and electrical equipment protection. When the high resistance grounding system is not utilized the aforementioned signals from the sensors are easily carried by the power conductors.