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Mechanism found in Janssen and Conn Player Pianos

While this system has been around since around 1967, it has remained somewhat 'under the radar' until now. The mechanism was made by Welte-Mignon in New York, NY. It is quite a unique system which employs a bi-directional electric drive motor and a rudimentary electronic tempo control. While somewhat crude looking, the mechanical devices are fairly rugged and very functional. The entire mechanism, with the exception of the vacuum pump, is located above the keys. The stack contains plastic unit block valves that are very similar in design to the Aeolian block valves. However, they are about 20% smaller and they are attached directly to the striker pneumatic. Sadly, no one makes replacements for these smaller block valves. However, looking at the dealers service manual, one gets the feeling that they can be repaired. Perhaps the most distinguishing characteristic of the system is the control panel, which is to the left of the spoolbox (see picture below). The unit is also equipped with an automatic Repeat feature that actually works very well. To view more pictures of the components in this player mechanism -click here.

control panel plastic block valve electric drive motor

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This page was last revised February 19, 2013 by John A. Tuttle, who Assumes No Liability
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