Accession No

1868

Brief Description

engine indicator, by Crosby Steam Gage and Valve Company, U.S.A., 1900 (c)

Origin

U.S.A.; Massachusetts; Boston

Maker

Crosby Steam Gage and Valve Company

Class

engineering

Earliest Date

1895

Latest Date

1920

Inscription Date

Material

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

Dimensions

length 160mm; breadth 145mm; depth 75mm box length 200mm; breadth 190mm; height 120mm

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

‘CROSBY STEAM GAGE & VALVE CO.
BOSTON. MASS. U.S.A.
Pat’d July 2 & Sep. 2 - 1879
” Apr. 11 & Sep. 5 - 1882
” April 30 - 1895’ (object)
‘W.P./MED.2.’ (lid of box)

Description Notes

Engine indicator. Cylindrical valve which can be attached to engine being analysed by threaded stop cock. Piston on top of valve is attached to a steel arm with a stylus on one end which records the pressure on a white metal drum. This drum is rotated by means of a waxed string which unwinds from the base of the drum.
Fitted wooden box with white metal hinges and lock; carrying handle very corroded. Lined with brown velvet. Compartment in lid for drum papers (none extant). Box also contains eleven spare springs and four other replacement items for the indicator.

Condition good (apart from corrosion on box handle); complete.

References

Events