[pianotech] Jack Springs

[John Ross]

That must be a really long pipe cleaner. LOL
It seems to me, you would still have the untangling to do, in order to  
put them on the pipe cleaner.
A piece of string might work better.
John Ross,
Windsor, Nova Scotia.
On 11-Mar-10, at 6:23 PM, wimblees at aol.com wrote:

>
> they don't tangle into one giant permanent spring in the bag.
> to keep them from being tangled, I think there was a tech tip to put  
> them all on a pipe cleaner.
> Wim
>
>
>
> -----Original Message-----
> From: Ron Nossaman <rnossaman at cox.net>
> To: pianotech at ptg.org
> Sent: Thu, Mar 11, 2010 12:18 pm
> Subject: Re: [pianotech] Jack Springs
>
> John Ross wrote:
>  It is from Schaff, item number 527A, upright jack spring.
> > The physical properties are equal taper from top and bottom, to a  
> > compacting of a couple of coils, in the centre, like each end.
> > The old springs were a double at each end, and the winding went  
> wider in > the middle.
>
> John,
> I haven't used any of these yet, but there was a Journal article  
> (don't know when) on how the design was arrived at. There's less  
> torsion stress on the wire because there are more coils within the  
> compression range, pretty much eliminating breakage and producing a  
> more constant spring rate, and they don't tangle into one giant  
> permanent spring in the bag. I don't see a reason they'd be noisy,  
> but I don't really know. I'd try them.
> Ron N

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