General Information

Serial #

N/A

Part Number

26

Total Parts

26

AKA

N/A

Patents

N/A

General Description

WOOD CASE WITH BRASS FITTINGS.

Dimensions

Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.

Length

29.5 cm

Width

22.5 cm

Height

18.0 cm

Thickness

N/A

Weight

N/A

Diameter

N/A

Volume

N/A

Lexicon

Group

Industrial Technology

Category

Power sources

Sub-Category

N/A

Manufacturer

AKA

Dobbie

Country

Scotland

State/Province

Unknown

City

Glasgow

Context

Country

North America

State/Province

Unknown

Period

THIS TYPE OF INDICATOR USED IN LATE 1800S +.

Canada

Unknown

Function

TO TEST EFFICIENCY OF VALVES IN STEAM ENGINES, AND TO DETERMINE HORSE POWER DEVELOPED DURING OPERATION.

Technical

EXAMPLE OF STEAM ENGINE INDICATOR, WHICH IS USED AS ARECORDING PRESSURE GAUGE. IT PLOTS STEAM PRESSURE AND PISTON DISPLACEMENT IN A RECIPROCATING STEAM ENGINE. THIS TYPE WAS RECOMMENDED FOR USE ON ORDINARY MARINE AND LAND STEAM ENGINES. THE EXTERNAL SPRING DESIGN ALLOWED THE SPRING TO REMAIN RELATIVELY COOL WHEN NOT IN USE, PRODUCED MORE ACCURATE RESULTS, AND PROLONGED THE LIFE OF THE SPRING.

Area Notes

Unknown

Details

Markings

Goldtone decal on case top is badly damaged: reads in part " DOBBIE McINNES LTD./ ENGINEERING & [?]/ INSTRUMENT MAKERS/ THE BRITISH [?????] OFFICE./ GLASGOW/ AND AT/ LONDON, LIVERPOOL/ AND SOUTH SHIELDS. "/ Plate on case front reads " DOBBIE McINNES LTD./ HEAD OFFICE/ 57 BOTHWELL ST./ GLASGOW/ AND AT/ SO. SHIELDS/ LIVERPOOL/ LONDON "./ Notice and Scale documents secured inside case have been scanned- see hardcopies in supp. info. file, and/or scanned images on database.

Missing

N/A

Finish

Unknown

Decoration

N/A