Slide Rule

1994/001

‘The Fuller Calculator’: a long-scale cylindrical slide rule (1945)

SKU: 1994/001 Categories: ,

Description

‘The Fuller Calculator’ (1945): a long-scale cylindrical slide rule which consists of a cylinder which can be rotated and moved up and down around an inner cylinder held by a handle and is provided with three brass pointers or indexes. The logarithmic scale is arranged spirally on the outer cylinder and is the equivalent of a straight scale of 500 inches making it possible to obtain four figure accuracy in a result. Besides the operations of multiplication and division, results requiring reciprocals, powers, roots or logarithms of numbers can be obtained. The wooden case also acts as a support when the instrument is in use.

The slide rule was used not just by engineers but also by actuaries and other professions requiring greater accuracy.

The ‘Fuller Calculator’ was patented by George Fuller MICE in 1878.

Additional information

Acquisition Number

1994/001

Item Type

Short Description

Slide rule: "The Fuller Calculator'

Manufactured by

Date of Manufacture

1945

Sub-items

Wooden box and brass stand

Supporting Items

Book: The Slide Rule by CN Pickworth (see Reference Items).

Makers Number

4611 45

Marks

Stamped "4611/45"

Dimensions (mm)

436 (L) 78 (dia of outer sliding cylindrical sleeve)

Donor

Date Donated

1994

Materials

Wood, plastic laminate and brass

Condition

Good

Display Location