[CAUT] downbearing gauge, homemade

[Jeff Olson]

Wow, thanks, Fred.  Maybe I'm overly in touch with my feminine side, but I think it's downright cute.  The level on top is cool.  Think I might make me one (you didn't go and patent it, did you? :-)

Jeff

  -- Original Message ----- 
  From: Fred Sturm 
  To: College and University Technicians 
  Sent: Monday, April 03, 2006 12:15 PM
  Subject: [CAUT] downbearing gauge, homemade


  Hi all,
  Below are pictures of a downbearing gauge I made fairly recently.
  The basic component of this is the graduated line level, made for gutter hangers, plumbers and the like. It has lines corresponding to 1/8", 1/4", 3/8", and 1/2" per foot, which translates into a 1:96, 2:96, etc ratio, very close to 1:100, or a sine or tangent of .01 per unit. Set it on one segment and adjust to 0, then check other segments in comparison. (Start on one side of the bridge, with 0 facing the bridge). Or, for that matter, adjust to 1/8, so you can measure a negative difference in slope. Or just remember what it is and compare.
  This was a bare-bones design, easy to make. There are lots of ways it could be made fancier, but it works. The jiffy key lead on the bottom is for stability (lower center of gravity, so the gauge sits nicely on the string segment). The brass feet on the bottom are 1/8" brass stock, inserted and filed flat, then grooved with a file. The adjustment screw is a machine screw with reasonably fine threads. The hinge, which you can't see, is just a little decorative thing I found in the drawer: the right size for the job. The line level is scotch-taped onto the wood (hey, it holds, so I haven't bothered to do anything different.
  Regards,
  Fred Sturm
  University of New Mexico
  fssturm at unm.edu







  100_2790.JPG
  ?





  100_2791.JPG
  ?





  100_2796.JPG
  ?



-------------- next part --------------
An HTML attachment was scrubbed...
URL: https://www.moypiano.com/ptg/caut.php/attachments/20060403/5fe47f30/attachment-0001.html 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: image/jpeg
Size: 30035 bytes
Desc: not available
Url : https://www.moypiano.com/ptg/caut.php/attachments/20060403/5fe47f30/attachment-0003.jpe 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: image/jpeg
Size: 26327 bytes
Desc: not available
Url : https://www.moypiano.com/ptg/caut.php/attachments/20060403/5fe47f30/attachment-0004.jpe 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: image/jpeg
Size: 28780 bytes
Desc: not available
Url : https://www.moypiano.com/ptg/caut.php/attachments/20060403/5fe47f30/attachment-0005.jpe