Accession No

6567

Brief Description

Allbrit compensating planimeter in case, by A. West and Partners Ltd., English, mid/late 20th century

Origin

England; Westminster

Maker

A. West and Partners Ltd.

Class

calculating; drawing

Earliest Date

1945

Latest Date

1991

Inscription Date

Material

metal (brass, steel, other?); plastic; paint; glass; cloth (velvet); leather?

Dimensions

[Case:] 230mm (length) x 90mm (depth) x 40mm (depth)

Special Collection

Provenance

Donated by an individual on or before 01/03/2011. Owned by the late Professor Sir Richard Stone, eminent British economist, Professor of Economics at Cambridge University and Nobel Memorial Prize winner in Economic Sciences.

Inscription

ALLBRIT A. WEST & PARTNERS LTD MADE IN ENGLAND
WESTMINSTER
4582

Description Notes

Allbrit compensating planimeter in case, by A. West & Partners, English, mid/late twentieth century.

Pole arm consists of a dark blue/grey steel beam; one vertex has a cylindrical weight with a short anchoring spike on its underside; the other vertex has a silver steel spike mounted with a ball at its tip which forms a ball joint with the carriage of the tracer arm.

Fixed tracer arm: main dark blue/grey steel carriage contains a white measuring roller with drumhead scale and vernier; attached to the measuring wheel is a black registering dial (reads from 0 to 9) with a dark blue/grey pointer; carriage also contains a socket that forms a ball joint with the pole arm; protruding from the top side of the carriage is a white wheel to provide lateral support for measuring wheel; attached to the right of the carriage is a silver steel beam, at the end of which is a silver spike (tracer) and a silver hinge.

Testing rule is a silver metal thin beam with small spike on underneath, and with the inscription ‘10.04[square]“ ’ and ‘9.99 [square]” ‘ on its upper surface.

Includes a small magnifying glass.

Leatherette-covered fitted wooden box lined with blue velvet and metal seal.

Instruction manual is twelve pages long, has a grey cover, and reads as follows on the front:
‘Instructions
for the use of
The “Allbrit”
Planimeter’

Complete.

References

Events