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  • Koch, Huxhold & Hannemann (KHH) - made surprising System Korte slide rule that does addition & subtraction
  • Smallwood Folding Shoe Sizing Stick in metric for French shoe sizes 10-48 in increments of a Paris point (⅔ cm)
  • Lawrence MIT Antenna slide rule for radar antenna performance was classified during WWII by UK & US governments
  • ALRO-made ruler unusually with a cursor for analysing ECG printouts of the cardiac Sinus Rhythms
  • Hatters Gauge - for measuring the size of a hat but unusually calibrated in metric & imperial
  • Glovers Rule - for measuring the length of a glove in imperial inches
  • Unusual non-logarithmic QR 41 military model by Dennert & Pape (D&P) for training anti-aircraft gunners
  • Colour combinations slide rule made by German WH-Wohnen for Interior Designers
  • Professor Fuller’s Drum Calculator from 1878 - made by W.F. Stanley
  • Modern wristwatch with slide rule bezel calculator made by German maker Kienzle
  • Ruxton made Multi-Vider combined drop-lead pencil & slide rule
  • Rare Otis King Model N for Retail & Monetary with white scales (422 & 424) on a black background
  • Darnley’s Rotable Lightning Calculator/Pencil Case calculating aid
  • Makeba made Kombinator combination pencil & slide rule
  • Rare Carbic-made Fischer Calculator slide rule
  • Specialist slide rule for a national home cable radio broadcasting system offered in The Netherlands from 1930 to1970
  • Smallest drum (≈ 2.4m) made by renowned Swiss maker LOGA

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Interested in finding out more out about such calculating wonders? Then try one of the slide rule related articles (often light-hearted) I have published.
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Search results: Click on any Model listed in the leftmost column (or its image) for the full specification OR hover over its "Thumbnail" image (if shown) for a pop-up enlargement

You searched for: Danfoss
ModelTypeMaterialCommentsThumbnail
520H4713 Refrigerant plastic No slide Danfoss 520H4713
Calculator Heating flue gas losses plastic Calculations based on a standard calorific value of fuel oil - back of calculator gives fuel oil nozzle capacities Danfoss Calculator
(NoName) Pocket Refrigerant - early plastic

No slide

 Danfoss NoName Pocket Refrigerant
(NoName) Refrigerant plastic

No slide

 Danfoss NoName Refrigerant
RT.00.A1.00 Refrigerant plastic No slide Danfoss RT.00.A1.00
RT.00.A2.00 Refrigerant plastic No slide Danfoss RT.00.A2.00
RT.0X.A5.00 Refrigerant plastic No slide Danfoss RT.0X.A5.00
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