Double marking magnet

(Doppel-Markiermagnet)
Description: This is an event marker (somewhat like the later Gerbrands recorder) which is designed to place two different signal pulse-initiated marks on a kymograph. The magnets are held in position by an adjustable spring. A current causes them to move upward, thus changing the position of the pen until the current is ended. (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. 49). Leipzig: Eduard Zimmermann.

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

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