Regarding your question of August 16th @ 7:34 p.m.
‘’Are there any standard marking for the ruler, and is there any ruler with 1728 markings?’’
Well, the machinists’ steel ruler has 768 markings of 1 lr.oz., 1152 markings of 1/96’’, and 1200 markings of 1 cal. But 1200 markings are 528.0 markings short of 1728 markings.
Folks say that a steel ruler with 1728 markings of 1 dou. has been used, but I’ve never worked in the tool & die trade, so I don’t know.
Although the micrometer of 1728 markings of 1/12 dou. has been used, the usual one today has 10000 markings of 1/10 mil, making a measure of about 6.9 mil for the 1 dou.
Info @
http://www.weights-and-measures.com
And topic:
Common Linear Measure
5280 ft. = 1 stt.ml.
5280 yd. = 1 stt. league
5280 fth. = 1 stt. ken
Regarding your question of August 16th @ 7:34 p.m.
‘’Are there any standard marking for the ruler, and is there any ruler with 1728 markings?’’
Well, the machinists’ steel ruler has 768 markings of 1 lr.oz., 1152 markings of 1/96’’, and 1200 markings of 1 cal. But 1200 markings are 528.0 markings short of 1728 markings.
Folks say that a steel ruler with 1728 markings of 1 dou. -has been used, but I’ve never worked in the tool & die trade, so I don’t know.
Although the micrometer of 1728 markings of 1/12 dou. has been used, the usual one today has 10000 markings of 1/10 mil, making a measure of about 6.9 mil for the 1 dou.
Info @
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metre
While I can't make head or tail of these frightening numbers, Xcole deserves a medal for his effort to show how simple metric is. Thank you
JohnS-MI
Re: What Rules The Ruler?
August 25 2005, 3:50 PM
It is just babble. A rule with markings as fine as he refers to is unreadable.
I have a six inch (all Imperial) scale with scribed, not painted, markings for 1/10 and 1/50 of an inch on one side, 1/32 and 1/64 on the other. The 1/50 and 1/64 are about the limit of readability. Beyond that, you need vernier calipers or a micrometer, which uses some other principal to make the scale readable. The tool & die trade does not use common fractions, at least for precise work; they use thousandths, or ten-thousandths, if they are actually Imperial. Many aren't. (Don't worry, I have plenty of metric scales too, but in the US, you need at least one of each).
There are typography rulers marked 12 per inch as it was a fairly common type spacing, 144 per inch would be unreadable, and 1728 per inch laughably absurd.
It does show how complicated you can make Imperial if you try hard.
Re: What Rules The Ruler?
August 25 2005, 11:13 PM
It's very existance is complicated. No need to try at all, it does it on its own.