| 4912390 |
Apparatus for controlling firing of thyristors relative to a current reaching zero by using a microcomputer and hardware responsive to voltage crossing zero |
Earl J. Curran, Jr. |
1990-03-27 |
| 4887018 |
Line to line to line to neutral converter |
— |
1989-12-12 |
| 4876468 |
Thyristor driver turn-off circuit |
— |
1989-10-24 |
| 4802053 |
Control circuitry including phase failure relay |
Roger C. Wojtak, John S. Hoelzer |
1989-01-31 |
| 4796142 |
Overload protection apparatus for emulating the response of a thermal overload |
— |
1989-01-03 |
| 4724503 |
Phase unbalance detector |
— |
1988-02-09 |
| 4714977 |
Electronic delay timer |
John S. Hoelzer, Richard J. Graefe |
1987-12-22 |
| 4710692 |
Self calibration of the thyristor firing angel of a motor controller using a current window to determine a final value of a reference current lag phase angle |
Earl J. Curran, Jr. |
1987-12-01 |
| 4647825 |
Up-to-speed enable for jam under load and phase loss |
Mark Vincent Profio |
1987-03-03 |
| 4634951 |
Reduced voltage starter with voltage ramp control |
Julian C. Kampf, Jeffrey A. Reichard, Earl J. Curran, Jr., Richard J. Graefe |
1987-01-06 |
| 4409640 |
Abort cycle timer |
Mark Vincent Profio, Julian C. Kampf |
1983-10-11 |
| 4344102 |
Anti-telegraph control circuit for electromagnet coil |
Julian C. Kampf, Winfred R. Lemke |
1982-08-10 |