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Brian Law’s   Leonardo da Vinci Models
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Copyright © All rights reserved. Brian Law Design da-Vinci-Models-Odometer-p1.jpg da-Vinci-Models-Odometer-p3.jpg da-Vinci-Models-Odometer-p2.jpg da-Vinci-Models-Odometer-p6.jpg da-Vinci-Models-Odometer-p7.jpg da-Vinci-Models-Odometer-p5.jpg Odometer Drawing-1.JPG Odometer Drawing-2.JPG


The Odometer was designed to measure the distance travelled by the small cart. It was done through a series of gears which turned a wheel holding pebbles, these being released into a bucket beneath the carts framework. Counting the pebbles at the end of the journey allowed the distance travelled to be calculated.

The history of the odometer is a long one stretching back to Alexander the Great when he used an unknown device to measure the distance of his travels with great accuracy. Following that a Roman device that used the principle later picked up by Leonardo was described by Vitruvius as using a Roman Chariot wheel 4 feet diameter at the heart of the system that counted pebbles dropped into a bin after so many wheel rotation.

It would seem that Leonardo’s design using square toothed gears failed to work.

I have used the alternative worm gear on Leonardo’s alternative design to produce a model that will work.

Odometer - Codex Atlanticus Folio 1r

Odometer-Roman.jpg Odometer-1a.jpg

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I have put together a package of files that define the design in 2D and 3 D.

I have included PDF files of the 2D drawings that has all the parts laid out and dimensioned. Most of the parts are drawn at 1:1 scale so that they can be used as patterns to cut out the profiles.

I have also included DXF files so the relevant parts can be CNC machined. 3D files have been included in IGS and STP format so that they can be input to your own CAD program.

This package is available for $15 that can be paid through the button opposite. The 3D files can also be downloaded as an edrawing which can be viewed in a free viewer available here http://www.edrawingsviewer.com/pages/products/eDrawingsViewerpage.html

After payment you will be taken to a page where you can down load the files.

Please note that the payment will be made to Brian Law’s Woodenclocks, which is the sister site to this one.