Hi Kay,   Please would you email me directly?   I have some questions =
about your AS1.   Great pdf file, thanks so much.
Ted.    tchannel@............
  ----- Original Message -----=20
  From: Kay Wyatt=20
  To: psnlist@.................
  Sent: Sunday, January 23, 2011 3:01 PM
  Subject: Re: AS-1 Type Sensor


  Hi Richard,

  Chris Chapman has provided considerable guidance to me and suggested =
two possible alternatives to the knife edge of the AS-1. =20

  In the first example, he suggested clamping a standard razer blade to =
BOTH the horizontal arm and the vertical support.  The razer blade =
flexes very nicely with little friction.  Since I build seismometers for =
schools which sometimes have eager hands around them, I chose not to use =
a razer blade.  Even though the ends can be dulled, if the arm is bent =
too far it can snap and I was afraid of pieces flying off into eyes.

  The second design that Chris suggested I thought was so clever it was =
close to magic.  It is hard to describe, so I just uploaded a PDF file =
that has the design drawings that I made for my seismometer.  The pivot =
mechanism is shown on page two of the PDF file.  You can see from my =
work that it had strong influence from Chris Chapman who I consider to =
be my good friend.  Here is the link to the PDF file:

  http://www.oregonshakes.com/temp/DesignDrawings4.pdf

  Enjoy!
  Kay Wyatt


    ----- Original Message -----=20
    From: Richard Schneider=20
    To: PSNLIST@.................
    Sent: Sunday, January 23, 2011 11:54 AM
    Subject: AS-1 Type Sensor


    Hello PSN,

    I would appreciate any comments regarding my AS-1 type sensor. It's =
close to the original design. I did not like the knife edge aluminum =
boom attached to a score mark in the aluminum mast, so I modified the =
boom to mast attachment. I am using two razor blades. One on the boom =
and one on the mast. Hardened steel on steel. Friction is much less. =
Free running oscillations have a much longer duration. Does anyone have =
a better suggestion? I would like to hear from you.

    See my pic's here:  http://picasaweb.google.com/cfi2fly/MyPictures#

    Also, Chris, if you read this, if I reversed the coil and magnet, =
would the effort be worth the results?

    Thank you all,








Hi Kay,   Please would you =
email me=20
directly?   I have some questions about your AS1.   =
Great=20
pdf file, thanks so much.
Ted.    tchannel@............

  
----- Original Message ----- 
  From:=20
  Kay Wyatt=20
  
  
To: psnlist@.............. =

  
Sent: Sunday, January 23, 2011 =
3:01=20
  PM
  
Subject: Re: AS-1 Type =
Sensor
  


  
Hi Richard,
  
 
  
Chris Chapman has provided considerable =
guidance to me=20
  and suggested two possible alternatives to the knife edge of the =
AS-1. =20
  
  
 
  
In the first example, he suggested clamping a =
standard=20
  razer blade to BOTH the horizontal arm and the vertical support.  =
The=20
  razer blade flexes very nicely with little friction.  Since I =
build=20
  seismometers for schools which sometimes have eager hands around them, =
I chose=20
  not to use a razer blade.  Even though the ends can be dulled, if =
the arm=20
  is bent too far it can snap and I was afraid of pieces flying off into =

  eyes.
  
 
  
The second design that Chris suggested I =
thought was so=20
  clever it was close to magic.  It is hard to describe, so I just=20
  uploaded a PDF file that has the design drawings that I made for =
my=20
  seismometer.  The pivot mechanism is shown on page two of the PDF =

  file.  You can see from my work that it had strong influence from =
Chris=20
  Chapman who I consider to be my good friend.  Here is the link to =
the PDF=20
  file:
  
 
  
http://www.=
oregonshakes.com/temp/DesignDrawings4.pdf
  
 
  
Enjoy!
  
Kay Wyatt
  
 
  
 
  
    
----- Original Message ----- 
    From:=20
    Richard=20
    Schneider 
    
To: PSNLIST@.............. =

    
Sent: Sunday, January 23, =
2011 11:54=20
    AM
    
Subject: AS-1 Type =
Sensor
    


    
Hello PSN,
    
 
    
I would appreciate any comments regarding my AS-1 type sensor. =
It's=20
    close to the original design. I did not like the knife=20
    edge aluminum boom attached to a score mark in the =
aluminum mast,=20
    so I modified the boom to mast attachment. I am using two =
razor=20
    blades. One on the boom and one on the mast. Hardened steel on =
steel.=20
    Friction is much less. Free running oscillations have a much longer=20
    duration. Does anyone have a better suggestion? I would like to hear =
from=20
    you.
    
 
    
See my pic's here:  http://picasaweb.=
google.com/cfi2fly/MyPictures#
    
 
    
Also, Chris, if you read this, if I reversed the coil and =
magnet,=20
    would the effort be worth the results?
    
 
    
Thank you all,
    
 
    
Richard