Tom, The click rule is different it uses a threaded shaft that extends out of a sleeve with a nurreled nut to lock it in place. the threaded rod passes over a spring loaded detent that clicks every 1/16". The top surface of the movable rod is milled flat with 1/2" raised markings. You also have the option of adding a variety of extensions to this unit as well. The roto rule was described in an earlier post. I do a lot of metal fabrication and I like to keep my measurement accuracy less than a 1/16" and the roto rule does the trick for me. Both the click rule and the talking tape definitely have their place in doing initial cutting or bending operations.
HTH my friend. -----Original Message----- From: [email protected] [mailto:[EMAIL PROTECTED] On Behalf Of Tom Hodges Sent: Thursday, June 19, 2008 7:36 AM To: [email protected] Subject: Re: [BlindHandyMan] RE: measuring angles: Thanks for the info on the roto ruler. Is the same thing that some people call a click ruler? Also, why wouldn't you just use an electronic talking tape measure instead of something more complicated like this roto ruler? On Thu, Jun 19, 2008 at 9:18 AM, John Schwery <[EMAIL PROTECTED]> wrote: > A roto rule, named a Rotomatic, has a 6.5 inch measuring unit with > extension bars of 6, 12 and 18 inches. The measuring unit is a 3/8 > inch threaded rod , threaded 16 threads to the inch. This rod is > marked at each half inch and has a nut like object that spins on the > rod. The nub like object is marked on one side for reference. There is > also a locking nut to lock the nut like object in place if desired. > One can measure to an accuracy of 1/64 of an inch. > > earlier, Tom Hodges, wrote: > > >Hi, Tom: > > > >I must have come in on the back-end of this email; what specifically > >are > you > >referring to? Also, what is a roto rule? > > > >If I want to find the angle of something, I just my Sears 10" > >electronic level and tells you the exact angle. > > > >Thanks, > >Tom > > > >On Wed, Jun 18, 2008 at 7:31 PM, Tom Fowle <<mailto:fowle%40ski.org > ><fowle%2540ski.org>>[EMAIL PROTECTED]<fowle%40ski.org>> > wrote: > > > > > wonder why you couldn't have a device with two blades on a pivot > > > with a way to fasten the roto rule across the blades to make up a > > > triangle. Then "simple" trigonometry could let you adjust the > > > ruler to get a > desired > > > angle. This would be where you may have calculated the angle you > > > want > but > > > not have a reference from which to get it. > > > > > > And, obviously you could measure an existing angle with it too if > > > you actually needed the measurement. > > > > > > Yeah, you can find relatively accessible protractors, but > > > something > like > > > this > > > might be pretty easy to fabricate if we get it > > > figgered out correctly, and might be very accurate? > > > > > > So Dan Rossi, help with the gtrig. > > > > > > Let's assume most work would need angles less than 90 degrees as > > > you > can > > > always subtract from 180 and measure the opposite angle. > > > > > > There must be something wrong with this? > > > > > > Thinking caps on plese. We could build a prototype > > > and document it here at Smith-Kettlewell if nobody beats us to it. > > > > > > tom > > > > > > > > > > > > >[Non-text portions of this message have been removed] > > > > > >No virus found in this incoming message. > >Checked by AVG. > >Version: 8.0.100 / Virus Database: 270.4.0/1509 - Release Date: > >6/19/2008 8:00 AM > > John > > [Non-text portions of this message have been removed] > > > [Non-text portions of this message have been removed] ------------------------------------ Send any questions regarding list management to: [EMAIL PROTECTED] To listen to the show archives go to link http://www.acbradio.org/pweb/index.php?module=pagemaster&PAGE_user_op=view_p age&PAGE_id=33&MMN_position=47:29 Or ftp://ftp.acbradio.org/acbradio-archives/handyman/ The Pod Cast address for the Blind Handy Man Show is. http://www.acbradio.org/news/xml/podcast.php?pgm=saturday Visit The Blind Handy Man Files Page To Review Contributions From Various List Members At The Following address: http://www.jaws-users.com/JAWS/handyman/ Visit the archives page at the following address http://www.mail-archive.com/[email protected]/ If you would like to join the JAWS Users List, then visit the following address for more information: http://www.jaws-users.com/ For a complete list of email commands pertaining to the Blind Handy Man list just send a blank message to: [EMAIL PROTECTED] Groups Links -- BEGIN-ANTISPAM-VOTING-LINKS ------------------------------------------------------ Teach InfoWest Spam Trap if this mail (ID 186564412) is spam: Spam: https://spamtrap.infowest.com/canit/b.php?i=186564412&m=40db4847c240&c=s Not spam: https://spamtrap.infowest.com/canit/b.php?i=186564412&m=40db4847c240&c=n Forget vote: https://spamtrap.infowest.com/canit/b.php?i=186564412&m=40db4847c240&c=f ------------------------------------------------------ END-ANTISPAM-VOTING-LINKS
