Parcel platform balance by De Grave London, 1850-1880

1850-1880 in England and London

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Parcel platform balance by De Grave, London, with 6 Imperial and 8 metric weights. General three quarter view. Black
Science Museum Group Collection
© The Board of Trustees of the Science Museum

GPO parcel scale by De Grave, London with 6 Imperial and 8 metric weights

Roberval type balance used by the General Post Office for weighing parcels and made by De Grave, London. This balance was supplied with both metric (kilogram) and Imperial (pound) weights. This type of equal-arm platform scales uses linkages connected under each pan and joined together under the beam. Forming a parallelogram they utilize the Roberval principle that allows the pans to rest above the balance pivot rather than hang underneath the beam, as is normally the case in an equal-arm balance.


Weighing & Measuring
Object Number:
postal scales
  • furnishing and equipment
  • measuring device - instrument
  • weighing machine
  • furnishing and equipment
  • measuring device - instrument
  • weighing machine
  • scales - weighing device
  • beamscale
Science Museum (Great Britain)
Permanent collection

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