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Moore and Wright 2000 micrometer?

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Speedy Builder519/05/2013 21:09:10
2878 forum posts
248 photos

So Ian, I guess there aren't any model loco drawings dimensioned in fractions, using the terms 'full' and 'bare' to indicate the fit required.

Bob

Chris Heapy19/05/2013 21:17:51
209 forum posts
144 photos
Posted by Speedy Builder5 on 19/05/2013 21:09:10:

So Ian, I guess there aren't any model loco drawings dimensioned in fractions, using the terms 'full' and 'bare' to indicate the fit required.

Bob

What would be indicated on the calliper for a 'full' 13/32" ?

Michael Gilligan20/05/2013 00:02:26
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23121 forum posts
1360 photos
Posted by Phil P on 19/05/2013 10:21:01

The same man now owns both in his collection in the USA.

**LINK**

.

Phil,

Interestingly: His second picture, [endof the thimble] clearly shows a Patent Date, but ...

I just looked on Espacenet, and was surprised to find that's the date of Starrett's patent for the Thimble.

No reference to the worm driven indicator

MichaelG.

Speedy Builder520/05/2013 12:01:11
2878 forum posts
248 photos

Well Ian, 13/32 + could be 13/32 full and 13/32 - could be bare - "Simples!" - perhaps set the minimum fraction to be worked to - 32nds, 64ths, 128ths !!

Bob

Michael Gilligan20/05/2013 13:55:16
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23121 forum posts
1360 photos
Posted by Speedy Builder5 on 20/05/2013 12:01:11:

Well Ian, 13/32 + could be 13/32 full and 13/32 - could be bare - "Simples!" - perhaps set the minimum fraction to be worked to - 32nds, 64ths, 128ths !!

Bob

.

Hang the expense ... include 256ths

[which roughly approximate 254ths]

... What a pity that the importance of Binary wasn't recognised when they standardized those funny decimal/metric units.

MichaelG.

Speedy Builder520/05/2013 17:56:25
2878 forum posts
248 photos

I thought all engineering was BINARY - either it fits or it dosen't. Either it works or it doesn't !

Phil P20/05/2013 19:39:19
851 forum posts
206 photos

I still use the "Firkin" as a unit of measure.

It is very simple to use as its either two firkin long or two firkin short.

Phil

Edited By Phil P on 20/05/2013 19:39:44

Stub Mandrel20/05/2013 20:05:06
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4318 forum posts
291 photos
1 articles

You are right Michael. If they had agreed 1"=2.56 mm what a happy world it would be.

Instead we are left with Phil's binary system.

Neil

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