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[Contact Clocks]
Contact clock
Kontaktuhr
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Source |
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Zimmermann, E. 1923. Liste 33: Über Psychotechnik. Leipzig, Berlin
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Description |
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Contact clock. By every swinging of the pendulum, a contact disc is transported one pin further, and by a metal needle the power circuit is interrupted or opened by a second synchronized contact. The needle is adjustable by a crossing line, so that 1,2,3,4,5,10,15,20,30 and 60 seconds can be indicated. Due to the adjustable pendulum the apparatus also serves as a metronome; 1,700 kg. |
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ISSN 1866-4784: reference -
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