Chris,

Do you thing that purpose could be served if the rod was a modified =
"cotton reel" shape and it rolling on a polished flat plate with a =
slight bow in it ?

Regards

Ted

=20
  ----- Original Message -----=20
  From: ChrisAtUpw@..........
  To: psn-l@.................
  Sent: Tuesday, February 19, 2008 5:34 PM
  Subject: Re:=20


  In a message dated 2008/02/19, tedr@........... writes:


    You could create the same "rolling" effect by having 2 narrow plates =
a short distance apart on the upper edge of each a shallow curve of =
about 1000' radius. On these you sit a ground and polished rod of, say, =
2" (~50mm). I'm sure this would give the same effect as your cylinder, =
the only problem being of course - the creation of the curves.=20


  Hi Ted,

         You could probably get this sort of curvature most easily by =
flexing a flat plate? It is approximately 0.75 thou for a 6" long plate!

         Part of the problem is having large area contacts. This is most =
easily corrected with either strips of foil or wires.

         Regards,








Chris,
 
Do you thing that purpose could be =
served if the=20
rod was a modified "cotton reel" shape and it rolling on a polished =
flat=20
plate with a slight bow in it ?
 
Regards
 
Ted
 
<tedr@...........> 

  
----- Original Message ----- 
  From:=20
  ChrisAtUpw@....... 
  
To: psn-l@.............. 
  
Sent: Tuesday, February 19, =
2008 5:34=20
  PM
  
Subject: Re: 
  

In a=20
  message dated 2008/02/19, tedr@........... writes:


  You could create the same "rolling" effect by having 2 =
narrow=20
    plates a short distance apart on the upper edge of each a shallow =
curve of=20
    about 1000' radius. On these you sit a ground and polished rod of, =
say, 2"=20
    (~50mm). I'm sure this would give the same effect as your cylinder, =
the only=20
    problem being of course - the creation of the curves. =


Hi=20
  Ted,

       You could probably =
get this=20
  sort of curvature most easily by flexing a flat plate? It is =
approximately=20
  0.75 thou for a 6" long =
plate!

      =20
  Part of the problem is having large area contacts. This is most easily =

  corrected with either strips of foil or=20
  wires.

      =20
  Regards,

       Chris =
Chapman=20