Key return speed

[Ric Brekne]

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Hi

I'm guessing the English action refered too is more or less similar to 
the following diagram.

As you can see, the key has to pretty much make it back up on its own.  
There is a repetition spring to bring back the jack however, and if the 
hammer is checked high enough and the return spring is strong enough it 
is possible to get the jack under the knuckle quite quickly, aiding in 
the return of the key.  That said, the key has to be friction free 
enough and weighted appropriatly. It simply has to get moving on its own.

Not much you can do except regulate checking as high as you can get away 
with, get rid of excess friction, and make sure you have enough weight 
back of the balance rail pin.

Cheers
RicB



Ed writes:

I dunno what is involved in these actions.  It would be easy enough to 
place
a weight on the end of the key and see what happens.

regards,  
 
Ed Foote RPT

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