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Measuring tool---how and for what?

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Rules and Rulers33 of 140Holtzapffel & Co, 64 Charing Cross London, Ivory 6 inch ruleAtlas bicycle steel ruler
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    Posted 6 years ago

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    Glad
    (2 items)

    Some sort of measuring stick, maybe?? This was found in old barn. Rounded, but flat sides with the numbers-Metal bolt/top at one end. It has No 46 stamped on it, and it's about 24 inches long.

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    Comments

    1. UncleRon UncleRon, 6 years ago
      This device is not for measuring, it's a calculating device. It can be used, with a book of charts, to create angles and do other calculations. It can be used for navigating, shipbuilding, and other functions where angles are needed. It has a fancy name which escapes me just now.

      Each set of divisions gets progressively longer so, for example, start at point "A" on a straight line. Measure 8 units on any scale, say, number three, along that line. Call that point "B". At "B" make a 90 degree vertical line. When you get to the point on the vertical line where scale number seven, for example, also indicates 8 units - call that point "C". The book will tell you the angle between A-B and A-C.
    2. RRP RRP, 6 years ago
      Don't know for what, but it would look great on the wall above my workbench...:)
    3. Glad, 6 years ago
      The next question would be...what is it worth?
    4. UncleRon UncleRon, 6 years ago
      There doesn't seem to be a solid value for anything anymore. Recently I sold a nice group of old, handmade rules and measures. I was extremely disappointed in the prices realized at auction. Your piece would bring anywhere from $10 to $100 depending on whether or not at least two people who appreciated it showed up. Don't clean or re-finish is in any way except for a coat of non-acid wax if you want to protect it.
    5. Glad, 6 years ago
      Thank you all for the information...much appreciated.
    6. RRP RRP, 6 years ago
      I kept thinking I had seen one before, now I know.
      I is a lumber or timber gauge scale rule'
      Cheers

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