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Coromatic Ticket Alarm Clock
(Impulsed; moving magnet; electronically
switched)
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This alarm clock was made in Japan, probably in the late 1960s or early 1970s. |
The clock is powered by a single 1.5 volt battery, and has a 24 hour display formed by tickets that flip over each minute as the drum on which they are mounted rotates. |
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The alarm is set by the large wheel, and is sounded on the oval bell at the back of the movement being struck by a rotating hammer on the shaft of a small electric motor. |
The movement is governed by a moving magnet balance wheel which is electronically switched by one transistor. The electronics (one transistor, one resistor and two capacitors) are on a single board along with the coil assembly. The hands are driven by an inverted Sully escapement. |
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Voltage: | 1.5v |
Battery type: | one LR20/MN1300/D size cell |
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