Electromagnetic tuning fork

(Elektromagnetische Stimmgabel)
Description: A platinum to mercury cup contact is made and broken by a solenoid to drive a tuning fork at 50, 100, or 250 Hz. Different from No. 170 in that the platinum contact completes the circuit by dipping into a mercury pot. (Expanded caption Copyright 1998, Edward J. Haupt)
(Source: None given.)
Source of illustration: Zimmermann, E. (1903). XVIII. Preis- Liste über psychologische und physiologische Apparate (p. 47). Leipzig: Eduard Zimmermann.

DESCRIPTORS:
Type: component, timing, response
Stimulus: N/A
System: N/A
Output: time

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