Image / General Electric String Oscillograph, ca. 1925

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Title: General Electric String Oscillograph, ca. 1925
Creator: General Electric Company
Date Created and/or Issued: 1925/ /
Contributing Institution: History San Jose Research Library
Collection: History San Jose Online Catalog
Rights Information: Please contact the contributing institution for more information regarding the copyright status of this object.
Description: String oscillograph made by General Electric to observe the wave shape of alternating current signals. A vibrating mirror, in accordance with the signal, moved a light beam back and forth on the rotating mirrors, which gave the light trace an absissa so it could be viewed or photographed. Type PM. Form J. Serial number 705340. (Made in the 1920's, though patented April 20, 1903, April 27, 1909) [Description by John Kaar, February 1972] Perham no 457.71
Type: image
Identifier: 6EC3FC0E-51ED-48A1-82C9-294236147883
2003-1-2514
Subject: General Electric Company
Oscillographs (LCSH)
Oscilloscopes (LCSH)

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