A set of six calculators or slide rules that were used to calculate various electrical and mechanical properties of equipment at a nuclear generating station. These include: converting voltage signals from a variety of thermocouple junctions to temperature; motor capacity based on voltage, current and wire size; control-valve size requirements based on the characteristics of the fluid (water or steam) being controlled; and two slide rules for calculating electrical capacitance and resistance depending on environmental conditions and physical characteristics. Five of the units are made of coated paper, while the Ohmite, Ohms Law/Resistance calculator, is made of a plastic material. The physical sizes of the calculators are: Leeds and Northrup thermocouple – 10 cm by 24 cm; West thermocouple -10 cm by 25 cm; Square D motor calculator -8.5 cm by 15.5 cm; BSR control valve – 8 cm by 21 cm; Ohmite capacitance calculator – 7 cm by 18 cm; and Ohmite Ohm’s Law – 7.5 cm by 23 cm.
