[pianotech] Curiously curvaceous repetition lever

[Susan Kline]

Might what we took to be a spoon pressing against the letoff button 
really be
the repetition spring, looped to the front of the jack?

If so, what will press on the letoff button?

I agree, fun action .... David, could we get some more photos?

Susan

Overs Pianos wrote:
> Susan,
>
>> . . . Might there be a small coil spring hidden inside
>> the curve, pushing directly against the top part of the jack?
>
> I believe your speculation regarding a spring is correct, but it will 
> be the repetition-spring which is doing the work for the jack return 
> also. Notice that the rep' spring runs through what is almost 
> certainly a slotted wippen heel. There must be a loop cord which we 
> can't see, which is attached to the front of the jack (on the 
> key-front side of the jack-centre), so that the spring provides the 
> reverse jack rotation which is required to return it under the knuckle 
> after lett-off. This is an interesting concept, because with this 
> arrangement the jack escapement will be running in the same direction 
> as the rotation of the roller as the let-off point is approached. 
> Let-off should be a little less obvious in this action than it is with 
> a conventional arrangement. The idea of the lower 
> repetition-lever-centre is almost certainly intended to lower friction 
> between the knuckle and repetition lever during the let-off. But I 
> suspect that the centre has been lowered to such a degree that there 
> may well be some friction in the opposite direction to that which is 
> usual, with respect to a 'standard' action.
>
> Ron O.
> -- 
>   
> *OVERS PIANOS - SYDNEY*
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