|
Posted by Grant Erwin on April 8, 2007, 7:36 pm
Please log in for more thread options
I've recently had a whole bunch of times where I could have used a
tool which I can imagine and try to describe but not name. It would
be sort of like a protractor with legs except it needn't have any
degrees marked anywhere. I'm just thinking of 2 long (like 24") legs,
each quite straight, with a nicely made joint at one end so they can
be formed into a V of any angular dimension. To use them, I'd set them
using one of my protractors but then just use them as a gage. They would
be very handy when bending pipe to a particular angle, or fitting any
kind of pieces together at a specified angle. I could just make up a
couple of pieces of 1/8x24" strip and drill/ream holes for a clamping
bolt at one end, and round the corners around the holes. But I don't
like making tools I can buy - is something like this available?
Grant
--
Posted via a free Usenet account from http://www.teranews.com
|
|
Posted by Big Ben on April 8, 2007, 8:46 pm
Please log in for more thread options
On Apr 8, 6:36?pm, Grant Erwin wrote:
> I've recently had a whole bunch of times where I could have used a
> tool which I can imagine and try to describe but not name. It would
> be sort of like a protractor with legs except it needn't have any
> degrees marked anywhere. I'm just thinking of 2 long (like 24") legs,
> each quite straight, with a nicely made joint at one end so they can
> be formed into a V of any angular dimension.
Grant....in drafting, this tool is called a compass or a divider.
(they are different, mind you) They do make them in larger sizes
including the size (about) you are looking for but are generally used
in a classroom environment with chalk in them....
hmmm....would trammel points do it for you...I wonder.
http://tinyurl.com/2ed7gw
actually, I bet if ya look at the above link, you just might see
something you like...
--
Big Ben
the "no, I don't work for them, no, I've never purchased anything from
that company, all I did was a quick net-search" Slug
|
|
Posted by Shaun Van Poecke on April 8, 2007, 9:15 pm
Please log in for more thread options
> I've recently had a whole bunch of times where I could have used a
> tool which I can imagine and try to describe but not name. It would
> be sort of like a protractor with legs except it needn't have any
> degrees marked anywhere. I'm just thinking of 2 long (like 24") legs,
> each quite straight, with a nicely made joint at one end so they can
> be formed into a V of any angular dimension. To use them, I'd set them
> using one of my protractors but then just use them as a gage. They would
> be very handy when bending pipe to a particular angle, or fitting any
> kind of pieces together at a specified angle. I could just make up a
> couple of pieces of 1/8x24" strip and drill/ream holes for a clamping
> bolt at one end, and round the corners around the holes. But I don't
> like making tools I can buy - is something like this available?
>
> Grant
it sounds to me like you are describing a 'rule of chords'.... this is a
pretty common sort of a tool for boilermakers, its actually more like two
rulers, each one 12" long in the standard version, though you can get bigger
ones. they are joined together and can rotate to any angle, when you open
them up 180 degrees you have a 24" ruler. there are very accurate markings
on them (chords) that let you set the rules to any angle you like. the way
it works is hard to describe, but easy to do. along one of the rules is an
extra set of numbers... these represent angles. there is a punch mark at
zero that the tip of a set of dividers can rest on. you open up the divider
to get the angle you want... now, there is a reference punch on each rule.
use the divider to get the rules opened up to the distance youve measured
with the dividers and you have the angle you want. can also be used in
reverse to find out what angle you already have. accurate to about 1/4 of a
degree.
they're not hard to find, but not really cheap either. I cant tell you what
they cost in the states, but here is aus its about AU$50 for a halfway
decent one, maybe up to a hundred for a really good brand. youd probably
get a really nice one in the states for about us$40-50 i guess.
Shaun
|
|
Posted by Grant Erwin on April 8, 2007, 10:41 pm
Please log in for more thread options Shaun Van Poecke wrote:
>
>>I've recently had a whole bunch of times where I could have used a
>>tool which I can imagine and try to describe but not name. It would
>>be sort of like a protractor with legs except it needn't have any
>>degrees marked anywhere. I'm just thinking of 2 long (like 24") legs,
>>each quite straight, with a nicely made joint at one end so they can
>>be formed into a V of any angular dimension. To use them, I'd set them
>>using one of my protractors but then just use them as a gage. They would
>>be very handy when bending pipe to a particular angle, or fitting any
>>kind of pieces together at a specified angle. I could just make up a
>>couple of pieces of 1/8x24" strip and drill/ream holes for a clamping
>>bolt at one end, and round the corners around the holes. But I don't
>>like making tools I can buy - is something like this available?
>>
>>Grant
>
>
> it sounds to me like you are describing a 'rule of chords'.... this is a
> pretty common sort of a tool for boilermakers, its actually more like two
> rulers, each one 12" long in the standard version, though you can get bigger
> ones. they are joined together and can rotate to any angle, when you open
> them up 180 degrees you have a 24" ruler. there are very accurate markings
> on them (chords) that let you set the rules to any angle you like. the way
> it works is hard to describe, but easy to do. along one of the rules is an
> extra set of numbers... these represent angles. there is a punch mark at
> zero that the tip of a set of dividers can rest on. you open up the divider
> to get the angle you want... now, there is a reference punch on each rule.
> use the divider to get the rules opened up to the distance youve measured
> with the dividers and you have the angle you want. can also be used in
> reverse to find out what angle you already have. accurate to about 1/4 of a
> degree.
>
> they're not hard to find, but not really cheap either. I cant tell you what
> they cost in the states, but here is aus its about AU$50 for a halfway
> decent one, maybe up to a hundred for a really good brand. youd probably
> get a really nice one in the states for about us$40-50 i guess.
Those appear to be unique to England and/or Australia. I don't need the
chord markings, but the basic topology is correct. I'm thinking of sort of
a really large bevel square, that would work great.
Grant
--
Posted via a free Usenet account from http://www.teranews.com
|
|
Posted by DanG on April 8, 2007, 10:05 pm
Please log in for more thread options It sounds like a compass to me. How long of legs are you thinking
about?
Trammel points can get pretty infinite:
<http://toolmonger.com/2007/03/23/beam-compass-heads-draw-big-circles-like-a-pro/>
or
<http://malco.malcoproducts.com/products/awls/tr18.asp>
Malco makes some pretty big dividers for duct work:
http://malco.malcoproducts.com/products/awls/18.asp
______________________________
Keep the whole world singing . . . .
DanG (remove the sevens)
dgriff237@7cox.net
> I've recently had a whole bunch of times where I could have used
> a
> tool which I can imagine and try to describe but not name. It
> would
> be sort of like a protractor with legs except it needn't have
> any
> degrees marked anywhere. I'm just thinking of 2 long (like 24")
> legs,
> each quite straight, with a nicely made joint at one end so they
> can
> be formed into a V of any angular dimension. To use them, I'd
> set them
> using one of my protractors but then just use them as a gage.
> They would
> be very handy when bending pipe to a particular angle, or
> fitting any
> kind of pieces together at a specified angle. I could just make
> up a
> couple of pieces of 1/8x24" strip and drill/ream holes for a
> clamping
> bolt at one end, and round the corners around the holes. But I
> don't
> like making tools I can buy - is something like this available?
>
> Grant
>
> --
> Posted via a free Usenet account from http://www.teranews.com
>
|
| Similar Threads | Posted | | WANTED Thunderbolt receptacles | March 3, 2008, 4:51 pm |
| Syncrowave 300 Pulser unit wanted | August 2, 2007, 11:39 pm |
| CO2 regulator washer source? | April 12, 2008, 1:47 am |
| TIG Cart Project...Source for cabinet/drawers? | October 28, 2008, 5:34 pm |
| Re: Large quantity rod storage? | February 15, 2008, 5:15 am |
| Re: Large quantity rod storage? | February 15, 2008, 7:44 am |
| Re: Large quantity rod storage? | February 15, 2008, 8:14 am |
| Re: Large quantity rod storage? | February 15, 2008, 1:13 pm |
| Re: Large quantity rod storage? | February 15, 2008, 7:08 pm |
| Re: Large quantity rod storage? | February 17, 2008, 6:10 pm |
|
|
Yahoo! 
Google 
Windows Live 
del.icio.us 
digg 
Netscape 
XML Sitemap
> tool which I can imagine and try to describe but not name. It would
> be sort of like a protractor with legs except it needn't have any
> degrees marked anywhere. I'm just thinking of 2 long (like 24") legs,
> each quite straight, with a nicely made joint at one end so they can
> be formed into a V of any angular dimension.