Western Union Undulator
Circa
1936
About This Item
The Undulator was used to record the dots and dashes from a telegraph. The output was binary: either full up or full down. The machine was modified to respond in an analog manner, continuously covering the area between full-up and full-down.
The ink-writing EEG used by Gibbs, et. al., was built by Garceau in 1935, who obtained a model 2A Boehme Undulator from J.W. Milnor of the Western Union Telegraph Co. To it he connected a five-stage amplifier, preceded by a two-state, single-sided preamplifier. In 1937, Charles Henry analyzed a 1-channel sleep study written out by the Undulator.
This item is in the collection of
Graciously donated to ASET for permanent display by
Peter Seaba, Iowa City, IA
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