(Fallapparat wie No. III)
Description: This apparatus allows a ball to be released, by a
solenoid, from a variable height. The ball hits a plate and
closes an electrical contact. The height of the ball determines
the time delay between the release of the ball and the contact
closure. This version of the apparatus has the special features
that the pincers which hold the ball are opened by a solenoid and
can be opened remotely and also by a lever. The exact time of
opening can also be registered by means of a platinum contact.
(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. 34). Leipzig: Eduard Zimmermann.
DESCRIPTORS:
Type: component, stimulus timing
Stimulus: N/A
System: N/A
Output: N/A