Otis King Cylindrical slide rule 

Otis King Cylindrical slide rule

The Otis-King rule uses concentric telescoping metal cylinders with a continuous long spiral logarithmic scale. Calculations are done by sliding and rotating the cylinders relative to each other. The purpose of using a cylinder design slide rule is to increase the length of the scales, thereby improving the accuracy, relative to the linear type.

Date of Manufacture: 1960

Quantity Available: 1

Physical Condition: Good
Original Box: No

Otis King Cylindrical slide rule Prop For Hire