[pianotech] Curiously curvaceous repetition lever

[Mark Schecter]

Finally a good reason to keep the "big" computer: I can see the spring. 
It hinges in the repetition lever at a pin just forward (toward the 
player) from the rep lever height screw, at the back end of the lever. 
Its upper wing terminates above, at a tension adjusting screw accessed 
from the top of the rep lever. It departs from a slot at the bottom of 
the rep lever, again just forward of the rep lever height screw, and 
makes an arc that passes downward and through a slot in the wippen heel, 
continuing forward until it reaches the bottom of the jack, perhaps 
there's a little toe there. So when front of the rep lever stops at the 
drop screw, and the wip continues to push upward, the still-rising rear 
of the lever tensions the spring, pulling the bottom of the jack 
backward, thus throwing the top of the jack back forward toward its rest 
position. Or so I surmise.

~Mark Schecter

On 9/24/12 6:31 PM, Susan Kline wrote:
> The mice choked on that mildew long since! I can see that the jack
> trips to the rear instead of the front -- but where is the spring
> to get it back under? That would have to be acting in the opposite
> direction from what we expect, too. Pushing toward the front instead
> of pulling to the rear? Might there be a small coil spring hidden inside
> the curve, pushing directly against the top part of the jack?
>
> Susan
>
> Dale Erwin wrote:
>> Terry wrote...I'm trying to understand how escapement occurs with this
>> wippen.
>> the mice help stupid !
>>
>> *Dale Erwin R.P.T.
>> Erwin's Piano Restoration Inc.
>> **Mason & Hamlin/Steinway/U.S. pianos
>> www.Erwinspiano.com
>> Phone: 209-577-8397
>> *
>>
>>
>>
>>
>>
>> -----Original Message-----
>> From: Terry Farrell <mfarrel2 at tampabay.rr.com>
>> To: pianotech <pianotech at ptg.org>
>> Sent: Mon, Sep 24, 2012 6:09 pm
>> Subject: Re: [pianotech] Curiously curvaceous repetition lever
>>
>> I'm trying to understand how escapement occurs with this wippen. It
>> appears that the top of the rep lever hits the drop screw, pushing the
>> rep lever down, which in turn trips the jack with the letoff button on
>> the spoon (attached to the jack) - is that correct?
>>
>> Interesting for sure.  Where were Schroter's made?  Thanks for sharing.
>>
>> Terry Farrell
>>
>>
>> On Sep 24, 2012, at 7:31 PM, David Boyce wrote:
>>
>>> Found this action in a 1920s Schroter piano, a make I've not
>>> encountered before, piano or action.  How undulating!
>>>
>>> Best regards,
>>>
>>> David.
>>> <Action from Schroter piano.jpg>
>>