(Elektromagnetischer Rotations-Apparat nach Helmholtz)
Description: An early version of a direct-current open-frame
electric motor which has a constant speed when rotating and which
is capable of varying speeds. The rotation speed is varied
through use of a governor. This device could be used for color
mixing by turning a pulley which drives a color mixer through a
pulley. (Expanded caption Copyright 1998, Edward J. Haupt)
(Source:Herman Helmholtz, illustrated as plate XLIX in Cyon, E.
v. (1876). Atlas zur Methodik der physiologischen Experimente
und Vivisectionen: LIV Tafeln in Holzschnitt. Giessen: J.
Ricker'sche Buchhandlung.)
Source of illustration: Zimmermann, E. (1903). XVIII. Preis-
Liste über psychologische und physiologische Apparate
(p. 6). Leipzig: Eduard Zimmermann.
DESCRIPTORS:
Type: component
Stimulus: N/A
System: N/A
Output: N/A