Slide rule workshop K

Chris' mystery slide rule Nr. 5

Folded plastic with plastic slide

Click images for magnification

Data:

  • Folder plastic with plastic slide
  • Plastic special shaped cursor
  • Tables and inch/decimal equivalents!!

Questions:

  1. Name?
    C-Thru (C-Thru Ruler Company) James Bready, Fred Astren
  2. Purpose of small bulge at each side?
    When simple folded over plastic is used for the stock with a full-width plastic slide, sometimes such “small bulges” or something similar act a “brake” to ensure the slide does not too easily slide out. David Rance
     The bulge prevents the cursor from falling off. James Bready, Fred Astren