(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