Name/Title
Pocket calculatorEntry/Object ID
2025.1.157Description
Otis King's Patent Pocket calculator. Scale N423.Context
Cylindrical Pocket Slide Rule with Helical Scales, Made in England by Carbic Ltd., London 1921-1972. Patent 183723. It was designed by Otis Carter Formby King (1876–1944) who was a grocer and electrical engineer.Acquisition
Accession
2025.1Source or Donor
Gordon DempsterAcquisition Method
TransferMade/Created
Manufacturer
Carbic Ltd, London, UKDate made
1960Dimensions
Width
30 mmLength
150.5 mmWeight
212 gDimension Notes
The length extended is 28 cm