Sector and joynt rule

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A sector is an instrument for solving computations which use the rules of proportion. This wooden sector and joynt rule was made around 1686, and was possibly owned by Robert Hudson of Leeds.

The sector and joynt rule has a brass hinge and brass reinforcing studs. This side in inscribed with various scales is signed 'Robert Hudson Leeds 1686'. On the inner limb edges are foot and inch scales, on the outer ones trigonometric scales.

Although London was the centre of the British instrument trade, instruments were made and used outside the metropolis from a fairly early date.

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• Online ID: 000-100-102-841-C
• Image Rights Holder: National Museums Scotland
• Project: National Museums Scotland
  Project description   View all records in project
• Ref: National Museums Scotland  T.1990.88
• Date: Around 1686
  c. 1686
  
• Material: Boxwood, brass. Inscription: Robert Hudson Leeds 1686
  Sector / joynt rule
  
• Dimensions: 12.00"
  
• What: Sector / joynt rule
  
• Subject:
• Who: J. Brown (Made in his style)
  Robert Hudson (Owner?)
  
• Where: England, Leeds
  England, London
  
• Event:
• Description: Sector and joynt rule in the style of J. Brown of London, possibly owned by Robert Hudson of Leeds, c. 1686
  
• References:
  • Morrison-Low, A.D., ' "Spirit of Place": Some Geographical Implications of the English Provincial Instrument Trade, 1760-1850' in Bulletin of the Scientific Instrument Society, No 53 (1997) pp 19,23 
• Translations:
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