Accession No

1867

Brief Description

engine indicator, by Elliott Brothers, English, 3/4 19th Century

Origin

England; London; 449 Strand

Maker

Elliott Brothers

Class

engineering

Earliest Date

1850

Latest Date

1875

Inscription Date

Material

metal (brass, white metal (at least three types), steel); wood (mahogany, two others); cloth (velvet); paper; rope (string)

Dimensions

height 200mm; breadth 211mm; depth 135mm box length 252mm; breadth 239mm; height 89mm

Special Collection

Heywood collection

Provenance

Purchased from the Professor Harold Heywood collection under estate duty exemption benefit with the assistance of a Science Museum grant-in-aid.

Inscription

‘ELLIOTT. BROS.
LONDON’
‘RICHARDS’ PATENT STEAM-ENGINE INDICATOR....
MANUFACTURED BY
ELLIOTT BROTHERS, OPTICIANS, 449, STRAND, LONDON.’ (paper label in lid of box)

Description Notes

Engine indicator. Cylindrical brass valve which can be attached to engine being analysed via a brass joint with ebony and brass tap. Piston on top of valve is attached to a white metal arm (supported by shaped brass arm) with a pencil on one end which records the pressure on a paper (missing) fixed around a brass drum. This drum is rotated by means of a waxed string which unwinds from the base of the drum. White metal scale on drum divided [-15] - 0 - [35], numbered by 10, subdivided to 1.
Fitted mahogany box with brass hinges, hook fasteners and press-button lock. Brass carrying handle (very corroded). Lined with purple velvet.
Box contains one spare spring (very corroded) (with space for five more) and steel core. Paper label with directions for changing spring in lid. Lid of box split. Pencil inscription in lid.

Complete.

References

Events