Your search query on "SARGENT-WELCH Pump Controllers" returned the following results:

Sargent-Welch TurboTorr Speed Control & Rotor Protector System 41-5918 (124065185227)

Sargent Welch Turbomolecular Pump Power Supply - Model 3134 PS (144665261625)

Sargent Welch Turbo Torr Turbomolecular Vacuum Pump Lot #Two Pumps & Controller (255948309608)