In a message dated 23/03/2008, paleoartifact@......... writes:

I ran across some phosphor bronze metal alloy strip coils recently and  
naturally the thought of
using such in a seismometer comes to mind.  One size is .007" thick  X .375" 
width,
and the other is .014" thick X 1" width.  The springs are  tempered.

Hi Meredith,
 
    The 7 thou stuff is likely too rigid for a good  Wood-Anderson. You can 
buy bronze wire relatively easily.
 
    And it is rather thick for light flexures. Maybe OK  on a Sprengnether.

The internet yields very little or no recommendations or any real strong  
negative
(metal creep..PSN email @ ~1999).
 
Besides the possible usual flexure use: I do envision (muse) on the  thought 
of
trying such as a taut vertical strip spring and with a  attached/extended 
light weight mass
which operates in a horizontal sensing configuration.  Yes; its a  old idea 
similar to the old
Wood-Andersons of yesteryear; but different only in it being a strip and  not 
a round
wire as a torsion pivot.  
 
Thoughts?  Recommendations?


    The 14 tho stuff should make OK springs for a  vertical? 
    How long are the coils?
 
    Regards,
 
    Chris



   





In a message dated 23/03/2008, paleoartifact@......... writes:
<=
FONT=20
  style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size=
=3D2>
  
I ran across some phosphor bronze metal alloy strip coils recently an=
d=20
  naturally the thought of
  
using such in a seismometer comes to mind.  One size is .007" th=
ick=20
  X .375" width,
  
and the other is .014" thick X 1" width.  The springs are=20
  tempered.
Hi Meredith,
 
    The 7 thou stuff is likely too rigid for a good=
=20
Wood-Anderson. You can buy bronze wire relatively easily.
 
    And it is rather thick for light flexures. Mayb=
e OK=20
on a Sprengnether.
<=
FONT=20
  style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size=
=3D2>
  
The internet yields very little or no recommendations or any real str=
ong=20
  negative
  
(metal creep..PSN email @ ~1999).
  
 
  
Besides the possible usual flexure use: I do envision (muse) on the=20
  thought of
  
trying such as a taut vertical strip spring and with a=20
  attached/extended light weight mass
  
which operates in a horizontal sensing configuration.  Yes; its=20=
a=20
  old idea similar to the old
  
Wood-Andersons of yesteryear; but different only in it being a strip=20=
and=20
  not a round
  
wire as a torsion pivot.  
  
 
  
Thoughts?  Recommendations?

    The 14 tho stuff should make OK springs for a=20
vertical? 
    How long are the coils?
 
    Regards,
 
    Chris