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Scale/rule ?

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RobWilson:
Hi Lads


Whats the reasoning behind calling say a 6" rule  a scale in the USA ?   


Rob

Joe d:
Ask George III.... he was the last RULER in the US :lol: :lol:

Lew_Merrick_PE:
Hi Rob,

A rule is a conclusion derived from a set of axioms.  A scale is a set of spacings.  This was a definition from the US National Bureau of Standards -- back when the US had such a thing.  (It has been replaced by the National Institute of Standards Technology which is an Institute dedicated to the protection of intellectual property.  Their 600+ page charter makes no statement whatsoever about promulgating of enforcing standards!)

sparky961:
Ignorance?

From what I've learned, a scale is used by draftsmen (or draftspeople, if you prefer) to make a drawing to a certain scale.  A rule, by contrast, has increments in real world dimensions.

It's unfortunate but most people do call the little flexible pieces of steel with numbers on them "scales" and you get a weird look if you call it a "rule".

Manxmodder:
Is there any company selling foundrymans rules these days?

Edit to add:I should have said patern makers shrinkage rules which are in fact scales rather than specific measurement rules.

I found one here:  http://artisanfoundry.co.uk/store/product_info.php?cPath=32&products_id=208&osCsid=932b7bbb45af1524a27fd64a7709dd8e

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