>...Is the piece shaped like 7 or more like ]? The latter suggests a class >of actions with articulated jacks... >Clark Clark, LIst, It is shaped like an upside down' 'L' wire (that's mighty close to a 7 shape). It is mounted into the top of the jack by means of the following description. The tip of the jack is very large and extends beyond the hammer butt providing a platform for the mounting of this wire. When the jack is at rest, the wire inserts itself into a neatly engineered hole in the hammer butt. This one Conover Upright design is merely a masterful approach to allow the action to be removed without the wippens falling away from the hammer butts. It eliminates the need for any bridle strap/wire apparatus for this specific purpose. That's all. > Is there a hammer spring? Yes, there are hammer return springs in this piano. As to the rest of your post, while very interesting, I can't envision any similarities in design and/or purpose of this particular Conover feature to the ones you described. Keith McGavern Registered Piano Technician Oklahoma Chapter 731 Piano Technicians Guild USA
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