Charles Bruning - 2401 Greg's Slide Rules


Charles Bruning - 2401 - Notes

  1. Bruning seems to have made a range of straight and round slide rules.
  2. This rule seems to be made in several pieces and the screws on the reverse provide for some level of adjustment as a result.
  3. For a plastic rule the cursor is very complex being made from 2 plastic and 2 metal pieces, fixed with screws around a glass element.


Further details about this Slide Rule:

Brand Charles Bruning
Model 2401
Country of Manufacture USA
Scales Front Centimetres, A [B, CI, C] D, K, Inches
Scales Back [S, L, T]
Number of Scales 9 - Not including Centimetre and Inch rules at edge of slide
Slide Rule Materials Plastic
Cursor Materials Metal/Plastic/Glass
Cursor Lines 1 Front
Scale Length 12.5 cm
Length 15.2 cm
Width 3.5 cm
Condition Good - Manual shows slight tear on cover as well as being very wrinkled from being folded in the box for a long period of time.
Documentation Charles Bruning - 2401
  1. Leather pocket pouch
  2. Protractor
  3. Original box

Last updated: 2002-06-30 12:55 AEST
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