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William Gentry Shelton (1873-1933) was a St. Louis inventor with many patents to his name, who moved to Chicago and began offering electric apparatus. By 1922, the firm had become Shelton Electric Laboratories, with headquarters in New York City. By 1927, it had become the Halliwell-Shelton Electric Corp., with offices in New York and Chicago, and a factory in Fort Wayne, Ind. A label in the box of this violet ray machine reads “HALLIWELL SHELTON.”
Ref: William Gentry Shelton, “Casing for Violet-Ray Generator,” U.S. Design Patent 63,203 (Oct. 30, 1923).
Halliwell-Shelton Electric Corporation, The Relief of Pain and Treatment of Disease by Violet Ray (New York and Chicago, 1930).
Currently not on view
Object Name
Electrotherapeutic Apparatus, Violet Ray
electrotherapeutic apparatus
violet ray
Other Terms
Lamp, Electrotherapeutic; Electrotherapeutic Apparatus, Violet Ray; Medicine
Shelton Electric Laboratories
Physical Description
wood; glass; plastic; metal (overall material)
overall: 7.2 cm x 38.6 cm x 21 cm; 2 13/16 in x 15 3/16 in x 8 1/4 in
ID Number
catalog number
accession number
Credit Line
Dr. Alfred R. Henderson
See more items in
Medicine and Science: Medicine
Data Source
National Museum of American History
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