Engineer's combination rule, c. 1870 includes prot

Made:
1870
maker:
Joshua Routledge

Engineer's combination rule, c. 1870 includes protractor, depth gauge, rule and slide rule function. This combination rule includes a protractor on the jointed hinge and a brass depth gauge sliding section and a sliding logarithmic scale which could be used as a slide rule type calculator.

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Science Museum: Making the Modern World Gallery

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Details

Category:
Industrial Metrology
Object Number:
1984-414
Measurements:
overall: .1575 x 4.9213 x 1.6535 in.; .4 x 12.5 x 4.2 cm
type:
depth gauge
taxonomy:
  • furnishing and equipment
  • measuring device - instrument
credit:
Wickham, H.W.
status:
Permanent collection

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