This item is under embargo and not available online per the author's request. For access information, please visit http://digital.wustl.edu/publish/etd-search.html.
Publication Date
Summer 8-15-2019
Document Type
Final Report
Problem Statement
This report details the design process, from ideation to iteration, of a sidewalk chalk spirograph machine prototype. The spirograph machine utilizes a set of lazy tongs, gear system, and lazy susan bearing that allow the user to sit on the platform and turn a crank to create vibrant, radial chalk patterns. The design team based design decisions on various analyses, including user needs, strength of materials, and industry safety codes and standards. All analyses are contained within the report, along with models and instructions that can be used to replicate the sidewalk chalk spirograph machine.
Class Name
Mechanical Engineering Design Project (UMSL JME 410)
Recommended Citation
Sommerfeld, Jennifer; Peterson, Franchesca; and Koch, Patrick, "Sidewalk Spirograph" (2019). Washington University / UMSL Mechanical Engineering Design Project JME 4110. 32.
https://openscholarship.wustl.edu/jme410/32