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Forum topic by Tony posted 10-09-2008 09:57 PM 3222 views 1 time favorited 14 replies Add to Favorites Watch
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Tony

986 posts in 4024 days


10-09-2008 09:57 PM

Topic tags/keywords: question ruler rule

Can any one help me – One of my students found a very old folding rule – Made in England. The scale on one side is the standard imperial 1” = 1”, but on the other side, the graduations are sill marked in inches, but 1” on the scale actually measures 1.75”

Does anybody know why and what is the purpose of this 1:1.75 ratio.

Thanks

-- Tony - All things are possible, just some things are more difficult than others! - SKYPE: Heron2005 (http://www.poydatjatuolit.fi)


14 replies so far

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Bob #2

3809 posts in 4015 days


#1 posted 10-09-2008 10:09 PM

Tony, it is very close to the ””Golden Ratio””:http://mathforum.org/dr.math/faq/faq.golden.ratio.html used for centruries to proportion furniture.
1 :1.68.
I wonder if it was used to scale up cabinetmakers samples to working size?
Many cabinet makers built miniatures and carried them to towns to draw contracts for furnisihings durin the 1800’s.
I’m guessing. – I got nothun.

Bob

-- A mind, like a home, is furnished by its owner

View Jbower500's profile

Jbower500

13 posts in 3551 days


#2 posted 10-09-2008 10:14 PM

Perhaps it is a method of determining lumber thickness after it had dried and been surfaced. 1.75 ” green rough. 1” finished lumber.

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GMman

3902 posts in 3691 days


#3 posted 10-09-2008 10:47 PM

Tony I have a triangle ruler that gives me the same thing and many more, it is measurements in tens, if you look up triangle ruler you will find your answer.

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GMman

3902 posts in 3691 days


#4 posted 10-09-2008 10:49 PM

I use to use mine at work to scale down a plan in drafting

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Tony

986 posts in 4024 days


#5 posted 10-09-2008 10:59 PM

I do not think it for measuring green wood – the quality of the rule is too high and delicate for that type of work.

The rule is in 4 sections, with a total length of 24”, the width is about 1/2” and the thickness is about 1/8”

It is made, I think by Archine werschock. Just checked the web, and these names actually might be a reference the type of measurement used, unfortunately a lot of the information is in German and Russian.

“Werschock, russ. Längenmaß, = 1/16 Arschin = 1¾ Zoll = 0,044 m.”

I think I might have just found the answer”Another fascinating line of Zig-Zag rules that Stanley manufactured were the Cyrillic rules in Werschock and Sajen, pre-Revolutionary Russian (1917) units of measurement. According to Webster’s Unabridged Dictionary, Sajen is a Russian measure of about seven English feet. For Sajcn units, an English rule 7 feet long was divided into 100 parts, making each part approximately 7/8 inch. A 7-foot rule in Werschock units was divided into 48 equal parts, which is about 1 ¾ inches per segment.

The material is Warrane (having knobs or protuberances; of a tree or piece of wood: having burls, knobs) box wood.

So in summary, it looks like it nothing more than a conversion between a Russian and English measuring systems from the late 19th to early 20th century.

-- Tony - All things are possible, just some things are more difficult than others! - SKYPE: Heron2005 (http://www.poydatjatuolit.fi)

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Bob #2

3809 posts in 4015 days


#6 posted 10-10-2008 01:25 AM

I was going to say that! <vbg>

Bob

-- A mind, like a home, is furnished by its owner

View Jbower500's profile

Jbower500

13 posts in 3551 days


#7 posted 10-10-2008 11:21 PM

Boy and we all overlooked the obvious

View MsDebbieP's profile

MsDebbieP

18615 posts in 4154 days


#8 posted 10-11-2008 12:51 AM

I’m too late… that’s what I was going to say but you found the answer first ! lol
and of course Bob beat me to it as well ;)

very interesting!

-- ~ Debbie, Canada (https://www.facebook.com/DebbiePribeleENJOConsultant)

View Don Newton's profile

Don Newton

716 posts in 3612 days


#9 posted 10-11-2008 01:47 AM

Unlike the others..I’d have never gotten that!

-- Don, Pittsburgh

View GMman's profile

GMman

3902 posts in 3691 days


#10 posted 10-12-2008 03:29 PM

It is funny after you find the answer everybody knew what it was, well I did not know I gave my idea of what I tough it was

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GMman

3902 posts in 3691 days


#11 posted 10-12-2008 03:37 PM

I have read about the zig zag ruler and it is old but if I compare to the (new version ruler) which is a triangular ruler it gives me the same answer it converts and used as a scale down ruler

View Bob #2's profile

Bob #2

3809 posts in 4015 days


#12 posted 10-12-2008 04:20 PM

Gman this ain’t it.

The one Tony has is for measuring Faberge Eggs !

Bob

-- A mind, like a home, is furnished by its owner

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Tony

986 posts in 4024 days


#13 posted 10-12-2008 09:34 PM

7 foot high eggs! :)

-- Tony - All things are possible, just some things are more difficult than others! - SKYPE: Heron2005 (http://www.poydatjatuolit.fi)

View Blake's profile

Blake

3443 posts in 3868 days


#14 posted 10-13-2008 08:56 PM

I’d love to see some good photos of it if you can. It sounds really interesting. Send a message to me if you post them.

-- Happy woodworking!

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