Alexander_M._Nicholson

Alexander M. Nicholson

Alexander M. Nicholson

Add article description

This article is about the inventor of the crystal oscillator. For the Canadian politician, see Alexander Malcolm Nicholson.

Alexander M. Nicholson was an American scientist, most notable for inventing the first crystal oscillator, using a piece of Rochelle salt in 1917 while working at Bell Telephone Laboratories. He then filed a patent the next year.[1] His priority was later disputed by Walter Guyton Cady who invented the first quartz crystal oscillator in 1921.[2]

References

  1. [1]
    Nicholson, Alexander M. Generating and transmitting electric currents U.S. patent 2,212,845, filed April 10, 1918, granted August 27, 1940
  2. [2]
    Hackman, Christine; Sullivan, Donald B. (26 August 1994). "Resource Letter: TFM-1: Time and frequency measurement" (PDF). Time and Frequency Division. National Institute of Standards and Technology, Boulder, Colorado 80303: 1–2. Retrieved 5 January 2016.


Stub icon

This article about an American inventor is a stub. You can help Wikipedia by expanding it.
Share this article:

This article uses material from the Wikipedia article Alexander_M._Nicholson, and is written by contributors. Text is available under a CC BY-SA 4.0 International License; additional terms may apply. Images, videos and audio are available under their respective licenses.