Hines' 'Patent Weight and Quantity Calculator', c 1908.

Richardson, Claire

Hines' 'Patent Weight and Quantity Calculator', c 1908.
3 4 c m
40cm
actual image size: 32cm x 26cm

Description

Mechanical ready reckoner patented by Patented by James Hines. This form of calculator gave costs of various quantities of goods at various prices per pound, hundredweight or ton. The quantity was set by turning the appropriate wheel at the side, and the price per unit by using the keys. The cost would then show in the apropriate window.

© Science Museum / Science & Society Picture Library

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