PSN-L Email List Message

Subject: RE: A test curtain rod bracket/s vertical
From: "Gary Lindgren" gel@.................
Date: Mon, 1 Sep 2008 21:27:26 -0700


Hi Meredith,

Thank you for your experiments. It's got me thinking in a new direction. You
and others have mentioned temperature affects. What is it that we need to
worry about. Is it the spring constant or just simple expansion/contraction
that we need to worry about. Are there ways we can use that will nullify the
affects, maybe bimetal springs?  Oh. and thank you for a heads-up on
Google's Chrome.

Gary

 

 

 

 

 

From: psn-l-request@.............. [mailto:psn-l-request@............... On
Behalf Of meredith lamb
Sent: Monday, September 01, 2008 3:45 PM
To: psn-l@..............
Subject: Re: A test curtain rod bracket/s vertical

 

Hi all,

Have explored further into the test curtain rod bracket with the flat 4
springs; and I see its further capable of attaining
a reasonably stable natural period in the 2.2 to 2.6s range...which I think
is pretty good for such a small size unit.
The maximum period I saw was 3.4s; but it was grossly unstable there.

I've no past home brew vertical experience at all; but, flat springs too me
initially, look to be the better way to go
for a short period vertical with a very light weight mass.  The variable
period "tuning" and "stability" aspect is 
something one probably wouldn't have much control on, with a comparable
traditional straight spiral main spring.

Anyway.....onward in time eventually to other suggested pivots....and
whatever problems occur with such.

By The Way:  

I note Google is supposedly launching their first web browser tomorrow for
download called "Google Chrome".
That will also be interesting to explore and compare to all the other
browsers.

Take care, Meredith

 












Hi Meredith,

Thank you for your experiments. It’s got me = thinking in a new direction. You and others have mentioned temperature affects. What = is it that we need to worry about. Is it the spring constant or just simple expansion/contraction that we need to worry about. Are there ways we can = use that will nullify the affects, maybe bimetal springs?  Oh. and = thank you for a heads-up on Google’s Chrome.

Gary

 

 

 

 

 

From:= psn-l-request@.............. [mailto:psn-l-request@............... On = Behalf Of meredith lamb
Sent: Monday, September 01, 2008 3:45 PM
To: psn-l@..............
Subject: Re: A test curtain rod bracket/s = vertical

 

Hi all,

Have explored further into the test curtain rod bracket with the flat 4 springs; and I see its further capable of attaining
a reasonably stable natural period in the 2.2 to 2.6s range...which I = think is pretty good for such a small size unit.
The maximum period I saw was 3.4s; but it was grossly unstable = there.

I've no past home brew vertical experience at all; but, flat springs too = me initially, look to be the better way to go
for a short period vertical with a very light weight mass.  The = variable period "tuning" and "stability" aspect is
something one probably wouldn't have much control on, with a comparable traditional straight spiral main spring.

Anyway.....onward in time eventually to other suggested pivots....and = whatever problems occur with such.

By The Way: 

I note Google is supposedly launching their first web browser tomorrow = for download called "Google Chrome".
That will also be interesting to explore and compare to all the other = browsers.

Take care, Meredith

 


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