[CW] Changing Sprngs

[Richard Knoppow]

    The sort of spring I mean can be seen in the first drawing of 
U.S.Patent No. 237808  Jesse Bunnell's steel lever key.

On 1/24/2018 6:46 AM, Bill Cromwell wrote:
> Hi Richard,
> 
> Some of those "hairpin" springs have a loop at the back and some are 
> just folded with no loop. They have been used a lot as stationary 
> retainers as well as return springs. They are use under the keys on my 
> accordions and I think most pianos. With multi-turn loops at the back 
> you will find them in mouse traps. Much heavier ones without a loop at 
> the back are on bear traps.
> 
> And then there are torsion bars... "let's do the twist".
> 
> 73,
> 
> Bill  KU8H
> 

-- 
Richard Knoppow
1oldlens1 at ix.netcom.com
WB6KBL