器材原始說明資料： | No.2
Schumann 氏連續瞬間露出器
SPINDLER & HOYER G.m.b.H. GÖTTINGEN (1928-1945) Nr.226
Schumann型瞬間露出器 Schumann's Tachistoscope
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Max Wertheimerの仮現運動実験使用と同系統か
Max Wertheimer in front of a tachistoscope in Friedrich Schumann's laboratory in Frankfurt
Tachistoscope - Wikipedia, the free encyclopedia
Titchener's Photo Album: An Important Source on Early Psychological Instrument Makers (Rand B. Evans)
One Meter Wheel Tachistoscope
Tachistoskop nach Schumann (http://vlp.mpiwg-berlin.mpg.de/Search)
(Prof. Dr. Sommer, Die Ausstellung von experimental - psychologischen Apparaten und Methoden bei dem 1, Kongreß für experimentelle Psychologie in Gießen, 1904, S.14).
Nr. 2. Schumann-Berlin: Tachistoskop mit Elektromotor.
http://www.uni-leipzig.de/~psycho/wundt/devices/giessen/giessen.htm#p14
A wheel of about 75 cm in diameter, together with a cord from a disc in the current axle bearings worn. The periphery of this wheel is a 10 cm wide sheet metal strips, in 8 parts can be disassembled. One of these Octant wears a gap of variable width and an adjacent Octant a sliding, under 45 ° from the plane of the wheel is tilted mirror. A telescope is now affixed to the apparatus that its field of view through the face plate ring, and only covered for a moment when the gap on the lenses over happens. In this way, the telescope by a sighted person trying different objects (letters, words, or the like) for any measurable time exactly visible. More or less may subsequently with the help of the mirror an intense light in the telescope and thus thrown the exposure of retarded positive after-image will be destroyed. This annihilation process allows a precise determination of time after that picture, even at the shortest exposure quite surprisingly long persisted and subjective factors to such an extent dependent on that it seems not worthwhile, Tachistoscope even more physical accuracy to construct. According to the long duration of the emotion is, inter alia, the well-known fact that the exposure of a few s under favorable circumstances, almost the same letters are recognized, as in a hundred times longer. The apparatus is run by string from a small electric motor from set in motion, whose speed of rotation of the centrifugal v. Helmholtz specified regulator is very stable. (Translated into English by Google)
Schumann, F. (1904). Die Erkennung von Buchstaben und Worten bei momentaner Beleuchtung, Bericht über den I. Kongreß für experimentelle Psychologie in Gießen vom 18. - 21. April 1904, 34-40.
Size about 800W
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