Large falling hammer delay timer

(Grosser Kontrollhammer)
Description: The hammer is electrically released by the upper solenoid. The duration of the hammer's fall is adjustable by varying the counterweight and this sets the delay. The hammer drops through a prism-shaped slot, precisely and with minimal friction. In addition, the turning axis pin, which passes through the pin-holder to which the hammer shaft is attached, is long in order to prevent lateral movement as the hammer falls. One of the main uses of these "hammers" was to provide precisely timed short durations to electrical switches to enable calibration of devices like the Hipp Chronoscope (No. 106), which were not themselves calibrated or self-calibrating. (Expanded caption Copyright 1998, Edward J. Haupt)
(Source: Wundt's Physiologische Psychologie, not otherwise cited)
Source of illustration: Zimmermann, E. (1903). XVIII. Preis- Liste über psychologische und physiologische Apparate (p. 35). Leipzig: Eduard Zimmermann.

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

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