Possible Spring To Use


Why must that be ?
otebook paper is only 0.003"=20
hy must a spring be so thin ?
Also,
This Zero Length spring stuff ?
o I understand right when I think
 zero length spring does not change force as the spring length changes ?
Could this mean two springs in opposition somehow ?

-----Original Message-----=20
rom: Brett Nordgren=20
ent: Sunday, May 01, 2011 4:09 AM=20
o: psnlist@.................
ubject: Re: Possible Spring To Use=20
All,
Probably quite a bit too thick for a good spring.
I don't know about geophones in particular, but astatic verticals=20
eed springs made of material having thickness in the range of 0.005"-0.012"=
.
ew spring material is easy to find on line (from mcmaster.com, for=20
ne) and a good sized piece (~2 sq. ft.) costs about the same as new=20
ake, though admittedly more than a discarded one.
Brett
At 10:50 PM 4/30/2011, you wrote:
Jolly Good Show old man,
can you please tell us if they would be
suitable for such use in building a
homemade geophone ?


-----Original Message----- From: hsvham Sent: Sunday, May 01, 2011=20
2:35 AM To: psnlist@.............. Subject: Re: Possible Spring To Use

I have a yard rake that has already started dismantling itself...I=20
can probably finish pulling it apart quite easily.

Steve

--- On Sat, 4/30/11, Geoffrey  wrote:

From: Geoffrey 
Subject: Possible Spring To Use
To: "PSN_LIST" 
Date: Saturday, April 30, 2011, 9:12 PM


I was watching this Nobel Prize winner in Pasadena CA raking his=20
yard of leaves
back in the 1970s and this makes me wonder today in 2011 if a common
yard rake tine would be anyway suitable as use in a seismometer
spring ?
A large yard rake might have a dozen long steel flat springs
if you can somehow dismantle the rake ?

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=
Possible Spring To Use





Why mu=
st that be ?
Notebook paper is only 0.003"=20
Why must a spring be so thin ?

Also,

This Zero Length spring stuff ?
Do I understand right when I think
a zero length spring does not change force as the spring length changes ?

Could this mean two springs in opposition somehow ?



-----Original Message-----=20
From: Brett Nordgren=20
Sent: Sunday, May 01, 2011 4:09 AM=20
To: psnlist@..............=20
Subject: Re: Possible Spring To Use=20

All,

Probably quite a bit too thick for a good spring.

I don't know about geophones in particular, but astatic verticals=20
need springs made of material having thickness in the range of 0.005"-0.012=
".
New spring material is easy to find on line (from mcmaster.com, for=20
one) and a good sized piece (~2 sq. ft.) costs about the same as new=20
rake, though admittedly more than a discarded one.

Brett

At 10:50 PM 4/30/2011, you wrote:
>Jolly Good Show old man,
>can you please tell us if they would be
>suitable for such use in building a
>homemade geophone ?
>
>
>-----Original Message----- From: hsvham Sent: Sunday, May 01, 2011=20
>2:35 AM To: psnlist@webtronic=
s.com Subject: Re: Possible Spring To Use
>
>I have a yard rake that has already started dismantling itself...I=20
>can probably finish pulling it apart quite easily.
>
>Steve
>
>--- On Sat, 4/30/11, Geoffrey <gmvoeth@...........> wrote:
>
>From: Geoffrey <gmvoeth@hotma=
il.com>
>Subject: Possible Spring To Use
>To: "PSN_LIST" <psnlist@we=
btronics.com>
>Date: Saturday, April 30, 2011, 9:12 PM
>
>
>I was watching this Nobel Prize winner in Pasadena CA raking his=20
>yard of leaves
>back in the 1970s and this makes me wonder today in 2011 if a common
>yard rake tine would be anyway suitable as use in a seismometer
>spring ?
>A large yard rake might have a dozen long steel flat springs
>if you can somehow dismantle the rake ?


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PSNLIST-REQUEST@.............. with=20
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To leave this list email =
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