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Impressive tools people come up with

Impressive tools people come up with

Far Canal
3 years ago

They are made in England by "Rabone&Chesterman", a well known company. I also have a set of imperial ones (inches) that I used to hate using.

wadewilson
3 years ago

Some of you may remember a trip I wrote about on the forum last year where I went up to Woomera. This thread reminded me of the impressive tool I took on that trip...

Impressive Tool

Far Canal
3 years ago

Quoting Far Canal on 01 Aug 2021 01:54 AM
How about these?.
The 2 rulers with black crosses on them are your normal metal rules you would buy at a hardware shop etc.
The other 2 rules are not normal rules. They have 4 different scales per ruler. In the picture you can see one is marked 1/50 and the other 1/60. This means for every 50mm there is an extra 1mm added, or for every 60mm there is an extra 1mm added. Between them the 2 rules have 8 scales 1/30,1/40,1/50 up to 1/100.
Why the blazers would you use these?

Quoting Soapbox2627 on 01 Aug 2021 02:17 AM
My guess

the steel worker would likely be more accurate using a scribe and blue, where the bloke in the shed using a pencil or marker (rough enough)
or
the metal worker would wear it down with through use and get the extra life

Top marks for your sense of humor SB.
Make a ruler that is not accurate for your rough as guts bloke in the Shed!
AND
Make them slightly longer in anticipation of future wear.
Both those answers are gold but unfortunately a bit wide of the mark.
They do have something to do with metal work though.

steelo
3 years ago

Quoting wadewilson on 01 Aug 2021 07:48 AM
Some of you may remember a trip I wrote about on the forum last year where I went up to Woomera. This thread reminded me of the impressive tool I took on that trip...

Impressive Tool

Performed faultlessly I understand

steelo
3 years ago

Quoting Far Canal on 01 Aug 2021 01:54 AM
How about these?.
The 2 rulers with black crosses on them are your normal metal rules you would buy at a hardware shop etc.
The other 2 rules are not normal rules. They have 4 different scales per ruler. In the picture you can see one is marked 1/50 and the other 1/60. This means for every 50mm there is an extra 1mm added, or for every 60mm there is an extra 1mm added. Between them the 2 rules have 8 scales 1/30,1/40,1/50 up to 1/100.
Why the blazers would you use these?

Quoting Soapbox2627 on 01 Aug 2021 02:17 AM
My guess

the steel worker would likely be more accurate using a scribe and blue, where the bloke in the shed using a pencil or marker (rough enough)
or
the metal worker would wear it down with through use and get the extra life

Quoting Far Canal on 01 Aug 2021 07:55 AM
Top marks for your sense of humor SB.
Make a ruler that is not accurate for your rough as guts bloke in the Shed!
AND
Make them slightly longer in anticipation of future wear.
Both those answers are gold but unfortunately a bit wide of the mark.
They do have something to do with metal work though.

What about DB's hammer

Far Canal likes this post

wadewilson
3 years ago

Quoting wadewilson on 01 Aug 2021 07:48 AM
Some of you may remember a trip I wrote about on the forum last year where I went up to Woomera. This thread reminded me of the impressive tool I took on that trip...

Impressive Tool

Quoting steelo on 01 Aug 2021 07:57 AM
Performed faultlessly I understand

Bit like BB's tool, you have to give it a good wack every now and then to get it to work.

Hoodeng
3 years ago

I am thinking the rulers are used where material gain is encountered, if you mark out a flat sheet of material and then fold it, you gain in the bends as the material bends on a surface not on a center line of the material. Bit like a tube bender that has gain calculated into the degrees when bending.
As to the scales ???.

Grease Monkey
3 years ago

I cannot remember the last time I used one, probably in the apprentice bay or tech, 1982-1986, there a couple in the measurement section of my tool box, plastic and metal ones.

Far Canal
3 years ago

Quoting Hoodeng on 01 Aug 2021 09:02 AM
I am thinking the rulers are used where material gain is encountered, if you mark out a flat sheet of material and then fold it, you gain in the bends as the material bends on a surface not on a center line of the material. Bit like a tube bender that has gain calculated into the degrees when bending.
As to the scales ???.

You are very close Hoodeng.
The rules are actually for where material loss is encountered.
They are very obscure, from a certain engineering trade that I stumbled into as a lad.

steelo
3 years ago

So they're not architectural scale rulers

Far Canal
3 years ago

No.
Not architectural.
Engineering,yes.

steelo
3 years ago

Decoding engineering drawings which cannot be drawn to scale?

Far Canal
3 years ago

No Steelo.
Actually, this was probably a cunt of a question in the first place.
If you did not do the trade you would not know.
Guess correctly what they are and I will post you a mystery PRIZE!.(not just Steelo, anyone on the forum)
Yes a prize!. You will just have to pm me your postal address, and acknowledge you got the prize.

steelo
3 years ago

Pattern makers Rule
Shrink rule or pattern makers scale is a special (oversized) rule used for easiness of pattern making. ... This oversized scale compensates shrinkage allowance, so one can measure the dimension as ordinary ruler without worrying the contraction of the metal. Every material has a specific shrinkage value.

Far Canal
3 years ago

Quoting steelo on 01 Aug 2021 10:44 AM
Pattern makers Rule
Shrink rule or pattern makers scale is a special (oversized) rule used for easiness of pattern making. ... This oversized scale compensates shrinkage allowance, so one can measure the dimension as ordinary ruler without worrying the contraction of the metal. Every material has a specific shrinkage value.

You win.
PM me your address.

steelo
3 years ago

For casting. Ingenious.
I've got a good selection of beautifully handcrafted pegs (other competitions)
Come up with another tool and use the prize for that..

steelo
3 years ago

What is this exquisitely constructed wood and plastic tool?

Grease Monkey
3 years ago

Well fuck a duck I thought they were engineering scale rulers, should of looked closer.

Wideglider
3 years ago

Quoting Hoodeng on 01 Aug 2021 09:02 AM
I am thinking the rulers are used where material gain is encountered, if you mark out a flat sheet of material and then fold it, you gain in the bends as the material bends on a surface not on a center line of the material. Bit like a tube bender that has gain calculated into the degrees when bending.
As to the scales ???.

Quoting Far Canal on 01 Aug 2021 09:35 AM
You are very close Hoodeng.
The rules are actually for where material loss is encountered.
They are very obscure, from a certain engineering trade that I stumbled into as a lad.

Very good, I learn something everyday.
So it's seems the pattern makers pretend a measurement is not really what it is, so then adjust it to suit their particular needs - not an engineering rule!
Rather than measuring and then applying a correction factor, make a fake rule.
Pattern-makers - carpets, curtains, cushions?

Soapbox2627
3 years ago

Quoting steelo on 01 Aug 2021 10:09 AM
Decoding engineering drawings which cannot be drawn to scale?

I have one of these rulers in my top draw in my office, great straight edge for tearing paper
looked at the markings for years and gave up on what they meant, it's still there

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