Jinx,
On Wed, 23 Mar 2005 18:44:13 +1200, Jinx wrote:
> Can anyone tell me what this ruler is for
>
> http://home.clear.net.nz/pages/joecolquitt/ruler.gif
It's a "scale rule", used for drawing and measuring from scale drawings. Architects and the like use them all
the time (or they do when drawing on paper as opposed to using software to do it!).
{Quote hidden}> Others are
>
> 1:100 (cm) 0-30
> 1:200 0-60
> 1:250 0-75
> 1:300 0-90
> 1:400 0-120
>
> I'm sure these scales have some absolutely wonderful uses. If I
> knew what they were (nothing at all on the wrapper). Is this a
> draughtsman's or architect's scaling ruler or something like that ?
Yup! You choose the scale that fits the paper nicely then use that side to draw your plans, reading off the
measurements (or powers of ten up and down from that) directly. My father was a partner in a building firm
(decades ago) and used one of these for drawing site plans, although his wasn't triangular but flat like a
normal ruler.
> How can I use it with a PIC ? (poking or threatening misbehaving circuits maybe)
Well as it's metal it would make a good short-circuit-protection tester! :-)
Cheers,
Howard Winter
St.Albans, England
mit.edu) wrote:
