- male, deceased (1961)
- Harry Guy Traver (25 November 1877 - 1961) was an American engineer and early "Roller Coaster" designer. In 1919 he founded the Traver Engineering...
- male, deceased (1981)
- Ralph E. Chambers (b. March 9 1889 - d. September 1981) was an engineer, inventor and builder of amusement rides in Beaver Falls, Pennsylvania...
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