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History of Mechanisms: The Odometer of the Mormon Trail

[+] Author Affiliations
Larry L. Howell

Brigham Young University, Provo, UT

Paper No. DETC2006-99604, pp. 311-323; 13 pages
doi:10.1115/DETC2006-99604
From:
  • ASME 2006 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
  • Volume 2: 30th Annual Mechanisms and Robotics Conference, Parts A and B
  • Philadelphia, Pennsylvania, USA, September 10–13, 2006
  • Conference Sponsors: Design Engineering Division and Computers and Information in Engineering Division
  • ISBN: 0-7918-4256-8 | eISBN: 0-7918-3784-X
  • Copyright © 2006 by ASME

abstract

The wagon odometer (or “roadometer”), designed, built, and implemented on the Mormon Trail, has generated much interest because of the documentation of the odometer’s design, the unusual circumstances under which it was developed, the impact it made on the settlement of the West, and the epic nature of the Mormon Exodus. This paper reviews first-person accounts documenting the odometer’s development, discusses the odometer’s impact, and reviews myths and misconceptions surrounding the odometer. In contrast to previous assumptions, this paper argues that enough information is provided from the accounts, combined with knowledge of gear design, to determine the actual gear sizes. Calculations and arguments are provided to support the idea that the gear diameters were 15 inches (38 cm) for the 60-tooth gear, 10 inches (25 cm) for the 40-tooth gear, and 1 inch (2.54 cm) for the 4-tooth gear.

Copyright © 2006 by ASME
Topics: Mechanisms , Gears , Design

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