| Patent Number |
Title Of Patent |
Date Issued |
| RE38625 |
Static switch method and apparatus |
October 19, 2004 |
| Method and apparatus for providing alternate current paths to a junction through different sets of gate controlled SCRs coupled to the junction. The method starts with the step of initiating a switch from an active set of SCRs to an inactive set by removing a gate signal from two paralle |
| 7589438 |
Source phase sensitive transfer method and apparatus |
September 15, 2009 |
| A method and apparatus for transferring AC electrical power to a load from a first power source to a second power source provides for a time delay in the transfer to avoid problems associated with differences in the phases between the power sources. The phase of the voltage waveform from |
| 5814904 |
Static switch method and apparatus |
September 29, 1998 |
| Method and apparatus for providing alternate current paths to a junction through different sets of gate controlled SCRs coupled to the junction. The method starts with the step of initiating a switch from an active set of SCRs to an inactive set by removing a gate signal from two paralle |
| 5644175 |
Static switch method and apparatus |
July 1, 1997 |
| Method and apparatus for providing alternate current paths to a junction through different sets of gate controlled SCRs coupled to the junction. The method starts with the step of initiating a switch from an active set of SCRs to an inactive set by removing a gate signal from two paralle |
| 5555182 |
Source quality monitoring system |
September 10, 1996 |
| A digital signal processor implemented monitoring circuit for detecting phase and magnitude disruptions in multi-phase alternating current input signals. A phase lock loop receives multi-phase alternating current input signals and provides one set of alternating current output signals in |
