James,

Am sure your round wire hinges (one per each hinge, or more?), that whomever
had the vertical before you substituted the round wire they had, for the
(probably
broken) original flat springs therein.  Evidently yours works ~ as is.  Mine
came with similar round piano wire/s; but they had like 4 wires of ~ 0.025"
diameter;
per each of the two hinge clamps (eight total), which I replaced with flat
springs....which also ~ worked...but, I still don't know the original flat
spring width/thickness.
Its interesting the variation of wire/flat springs that do work....but
whether they are really even near ideal is literally unknown.  If this
spring pivot spring is too stiff/thick, the
mass response won't be as enertially responsive as it ideally should be.

Your second sentence below leaves me pondering whether its some ~ (not a
normally spring) metal rod/s used?  It should be 0.025" diameter piano
wire....for initial setup flexuring
that it will go through in the process, and for simple high strength when
the spring is strung.   I suppose you could use all the loose locking 1/4"
rods to hold the boom;
and use a fine file edge (single light stroke) to see if it very strongly
resists filing like piano wire does, or; is relatively ~ easily filed like
iron etc.  Another clue;
piano wire is ultra smooth; a typical metal rod will feel like a drag on
your fingers when lightly run over.   "IF", the "straight length" you
mention is bigger than 0.025",
the previous owner may have removed acouple parts to accomodate their
"reengineering"....and you have to live with such.

Take care, Meredith



On Tue, Aug 19, 2008 at 6:59 PM, JAMES ALLEN  wrote:

>  Meredith and Dick
> My Spremgnether has two hinges made out of wire and looks like thick piano
> wire about 3/4 the thickness of pencil lead.   Additionally, instead of
> wires being attached to each ends of the spring attachments each end of the
> spring has a straight length that goes into the adjustment nuts.
> James
>
James,
 
Am sure your round wire hinges (one per each hinge, or more?), that whomever had the vertical before you substituted the round wire they had, for the (probably
broken) original flat springs therein.  Evidently yours works ~ as is.  Mine came with similar round piano wire/s; but they had like 4 wires of ~ 0.025" diameter;
per each of the two hinge clamps (eight total), which I replaced with flat springs....which also ~ worked...but, I still don't know the original flat spring width/thickness.
Its interesting the variation of wire/flat springs that do work....but whether they are really even near ideal is literally unknown.  If this spring pivot spring is too stiff/thick, the
mass response won't be as enertially responsive as it ideally should be.  
 
Your second sentence below leaves me pondering whether its some ~ (not a normally spring) metal rod/s used?  It should be 0.025" diameter piano wire....for initial setup flexuring 
that it will go through in the process, and for simple high strength when the spring is strung.   I suppose you could use all the loose locking 1/4" rods to hold the boom;
and use a fine file edge (single light stroke) to see if it very strongly resists filing like piano wire does, or; is relatively ~ easily filed like iron etc.  Another clue;
piano wire is ultra smooth; a typical metal rod will feel like a drag on your fingers when lightly run over.   "IF", the "straight length" you mention is bigger than 0.025",
the previous owner may have removed acouple parts to accomodate their "reengineering"....and you have to live with such. 
 
Take care, Meredith
 
     


On Tue, Aug 19, 2008 at 6:59 PM, JAMES ALLEN <jcallen1@...........> wrote:



Meredith and Dick
My Spremgnether has two hinges made out of wire and looks like thick piano wire about 3/4 the thickness of pencil lead.   Additionally, instead of wires being attached to each ends of the spring attachments each end of the spring has a straight length that goes into the adjustment nuts.

James