Accession No

6776

Brief Description

Otis King's Patent Calculator Model K, cylindrical slide rule, which belonged to Professor Sir Richard Stone, by Carbic Ltd., mid-20th Century

Origin

England

Maker

Carbic Ltd.

Class

calculating; mathematics

Earliest Date

1935

Latest Date

1949

Inscription Date

Material

metal; enamel; paper

Dimensions

width 150mm (closed)/260mm (open); diameter 33mm box 180mm width * 42mm depth * 39mm height manual 200mm * 105mm

Special Collection

Provenance

Donated on behalf of the late Professor Sir Richard Stone, Leake Professor of Economics, Cantab. by his family

Inscription

H 0191 [stamped on bottom]
MADE IN ENGLAND [stamped on top]
PATENT No. 183723 [near top]
COPYRIGHT. OTIS KING'S POCKET CALCULATOR. SCALE No. 423 [bottom of upper portion]
LONDON, PATENTEES & SOLE MANUFACTURERS; CARBIC LIMITED. SCALE No. 414. COPYRIGHT. [top of lower portion]
OTIS KING'S PATENT No. 183273 [bottom of lower portion]

Description Notes

Otis King's Patent Calculator Model K, cylindrical slide rule, by Carbic Ltd., mid-20th Century.

Otis King's Patent Calculator Model K, cylindrical slide rule. in box, with manual. Object is a small tube, diam. about 30mm and 150mm length. Extends to 260mm. Two logarithmically scales wrapped helically around the cylinders are free to move axially and radially. There is a plastic (bakelite?) sleeve with two pointer indicators. Arithmetic can be performed by lining the pointers up and adjusting the scale.

Box is cardboard, black on outside, plain on inside. Sticker on one end of the box reads "K H1900" (note the serial number on the object itself is H 0191). Box is in fairly poor condition. Manual comprises two leaves (8 pages) green paper with black ink and some diagrams. held with a single staple. Manual is generic to models K and L.

References

Events