(Telegraphentaster [amerikanisches Modell])
Description: This is a finger operated switch (like No. 135),
characterized by a "gentle secure movement" that can be made more
or less sensitive, through a spring and the distance to make
contact, adjusted by screws. Because of the shape, the key is
often called a "camelback" and was first used in the 1860s.
(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