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Born on this day in 1920 in Dallas, Texas, Otis Frank Boykin (†1982) was an accomplished electrical engineer with over two dozen patents to his name and credited with the invention several products and processes that led to improved resistors that Boykin applied to tamper-proof cash boxes, computers, cardiac pacemakers and missile guidance systems.  The inventor’s birthday also coincided with the first demonstration of the principle of electromagnetic induction by Michael Faraday (see previously) in 1831, whose successful series of public experiments led to the formulation of Faraday’s Law that predicts and describes how a magnetic field will interact with a circuit, the underlying concept for electrical motors, generators and inductors.