Investigation of inverse time limit overload relays
An undergraduate electrical engineering thesis by William Charles Deiss, submitted at the University of Illinois in 1915, testing inverse time limit overload relays for short-circuit protection. Hand-inked cross-sections and wiring schematics on ruled and graph paper, plotted time-current curves with lettered settings, and small halftone photographs of relay casings, useful for drafting-hand line work and grid-backed chart layouts.
