(Reaktionstaster mit Platinkontakt und Luftkapsel)
Description: When the switch is pressed, platinum contacts close
and air pressure is generated that can be used to operate other
apparatus. A device like this indicates that electrical
signalling with power from batteries was expensive and pneumatic
signalling was a less-expensive substitute. (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. 39). Leipzig: Eduard Zimmermann.
DESCRIPTORS:
Type: component, switch
Stimulus: N/A
System: motor response
Output: electrical closure