Rick Swanson Posted January 7 Posted January 7 I am trying to come up with some concrete dates for the four types of oscillators Emerson used. Lever Oscillator 1909 - ???? Ball Detent Oscillator ????-???? Modern Oscillator ????-1954 Buck Persons Oscillator 1955-Discontinued Thanks all for your help, Quote
Russ Huber Posted January 8 Posted January 8 (edited) 3 hours ago, Rick Swanson said: I am trying to come up with some concrete dates for the four types of oscillators Emerson used. Lever Oscillator 1909 - 1913 Ball Detent Oscillator 1914 - early 1919 Improved Oscillator 1919 - 1954 Buck Persons Oscillator 1955-Discontinued Thanks all for your help, Edited January 8 by Russ Huber Quote
Russ Huber Posted January 8 Posted January 8 (edited) This short lived patented adjustment case was introduced in late 1917? - 1918. It won't hold its sweep adjustment. Edited January 8 by Russ Huber Quote
Rick Swanson Posted January 8 Author Posted January 8 Thanks Russ. I sure do appreciate the help. Quote
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