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Kundo Mantel Clock
(Impulsed; moving magnet; electronically switched)


 
Kundo Mantel Clock

This mantel clock, made by Kieninger & Obergfell in Germany, is very similar in principle to the Estyma clock, but is later in design by around 15 years (i.e. around mid 1970s). It has a glass dome to protect it. This clock has two coils, a 'trigger' coil and an 'impulse' coil, but they are mounted together on the base in the same cylindrical casing. 

The curved bar on the pendulum is a hollow rod containing a magnet at its right hand end. As the magnet swings in and out of the coil assembly, the current induced in the trigger coil switches on a transistor and delivers impulse through a second coil.



The clock mechanism, which is visible through the aperture in the dial, is typical of the ATO design from which it derived. A pawl attached to the pendulum moves an index wheel round by one tooth on each right-to-left swing of the pendulum. The circular movement plates are 1.5 inches in diameter.
Kundo Mantel Clock
Kundo Mantel Clock

The electronics are contained within the coil assembly. The battery compartment is underneath the base.

 
Voltage: 1.5v
Battery type: one LR20/MN1300/D size cell
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Copyright  Text & Pictures - Martin Ridout.   Last updated Jan 2005.