Libert; James T.

Patent Applications and Registrations

Patent applications and USPTO patent grants for Libert; James T..The latest application filed is for "apparatus for controlling firing of thyristors relative to a current reaching zero by using a microcomputer and hardware responsive to voltage crossing zero".

Company Profile

0.9.0

Libert; James T. - Waukesha WI

*profile and listings may contain filings by different individuals or companies with the same name. Review application materials to confirm ownership/assignment.

Patent Activity

Patent	Date
Apparatus for controlling firing of thyristors relative to a current reaching zero by using a microcomputer and hardware responsive to voltage crossing zero Grant 4,912,390 - Curran, Jr. , et al. March 27, 1	1990-03-27
Line to line to line to neutral converter Grant 4,887,018 - Libert December 12, 1	1989-12-12
Thyristor driver turn-off circuit Grant 4,876,468 - Libert October 24, 1	1989-10-24
Control circuitry including phase failure relay Grant 4,802,053 - Wojtak , et al. January 31, 1	1989-01-31
Overload protection apparatus for emulating the response of a thermal overload Grant 4,796,142 - Libert January 3, 1	1989-01-03
Phase unbalance detector Grant 4,724,503 - Libert February 9, 1	1988-02-09
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 Grant 4,710,692 - Libert , et al. December 1, 1	1987-12-01
Up-to-speed enable for jam under load and phase loss Grant 4,647,825 - Profio , et al. March 3, 1	1987-03-03
Abort cycle timer Grant 4,409,640 - Profio , et al. October 11, 1	1983-10-11

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