Editing Voting machine (section)

====Dials====
By July 1936, [[IBM]] had mechanized voting and ballot tabulation for [[single transferable vote]] elections. Using a series of dials, the voter could record up to twenty ranked preferences to a [[punched card]], one preference at a time. Write-in votes were permitted. The machine prevented a voter from [[Spoilt vote|spoiling]] their ballot by skipping rankings and by giving the same ranking to more than one candidate. A standard punched-card counting machine would tabulate ballots at a rate of 400 per minute.<ref>{{Cite journal|last=Hallett|first=George H.|date=July 1936|title=Proportional representation|journal=National Municipal Review|language=en|volume=25|issue=7|pages=432–434|doi=10.1002/ncr.4110250711|issn=0190-3799}}</ref>

[[File:voting machine.png|thumb|Demo version of lever style voting machine on display at the [[National Museum of American History]]]]