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Mechanical calculator design problems

  1. Dec 16, 2009 #1
    hey....i have designed a mechanical calculator...i am using spur gears, bevel gears and stepped drums(Leibnitz drum)....my design is ready but the problems is how do i decide the dimensions of the gears like thickness, diameter etc....do i just select a convenient size....or do i do some analysis...if yes what analysis???.....all my components will be made from nylon....custom made....please help....i have attached different views of the model with the frame removed....

    Attached Files:

  2. jcsd
  3. Dec 16, 2009 #2
    Why? Natural gas flow meters and car odometers both have rotating dial mechanical readout with decimal carry. Copy them. About 40 years ago I sold my mechanical Friden desk calculator with multiply and divide for $25. I suspect you can still find them (or Marchants) in 2nd hand stores.
    Bob S
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