Can somebody kindly help me find out what this is ? I have had this rule for many years but have no idea what it is for I would really appreciate it if someone could enlighten me as to...

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Can somebody kindly help me find out what this is ?

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Jan 28, 2013 12:17:56 #

Julianmpb Loc: DurhamUK

I have had this rule for many years but have no idea what it is for I would really appreciate it if someone could enlighten me as to its use.
:?:

Jan 28, 2013 12:23:46 #

St3v3M Loc: 35,000 feet

http://www.rubylane.com/item/166090-R0703-73/24-Vintage-Wooden-Folding-Ruler
http://www.bidorbuy.co.za/item/83469965/Rabone_Chesterman_Wooden_folding_ruler.html

Jan 28, 2013 12:27:37 #

Julianmpb Loc: DurhamUK

Thanks for the reply but that is not the same . I have several of those folding wooden ones

Jan 28, 2013 12:47:30 #

Julianmpb Loc: DurhamUK

This was my fathers who at one time was an Artillery officer it may some connection to surveying.There is no manufacturers marks on it at all.

Jan 28, 2013 12:53:51 #

St3v3M Loc: 35,000 feet

Julianmpb wrote:

This was my fathers who at one time was an Artillery officer it may some connection to surveying.There is no manufacturers marks on it at all.

It may be a Gunners Folding Rule
http://www.mhs.ox.ac.uk/collections/search/displayrecord/?mode=displaymixed&module=ecatalogue&invnumber=37620&irn=1673&query=
#1.3.3 page 14 http://www.math.nus.edu.sg/aslaksen/gem-projects/maa/Geometry_of_War.pdf

Jan 28, 2013 13:12:20 #

Julianmpb Loc: DurhamUK

St3v3M wrote:

Julianmpb wrote:

This was my fathers who at one time was an Artillery officer it may some connection to surveying.There is no manufacturers marks on it at all.

Many thanks for that it would appear that it is something along those lines I will have to do some more research

Jan 28, 2013 13:31:25 #

Searcher Loc: Kent, England

I have a gut feeling it's more to do with navigation than surveying. I could be and am probably totally wrong, but if you follow the link, scroll down and you will find a small folding brass ruler in the marine section.
http://www.paulmaddenantiques.com/anin.html
The markings are quite indisinct but I think I can see the logarithmic scale which is clearer on your photos.
If I'm right, then S=Speed, T=Time t=?????
As it is labelled as a sector ruler, then I imagine you are measuring the angle of the horizon to an object in the sky - Sun, Moon, Star?

It's just a guess.

Of course if your father was artillery, maybe the instrument measured the angle at which the shell had to be fired. Another guess.

Jan 28, 2013 13:48:35 #

Julianmpb Loc: DurhamUK

Searcher wrote:

I have a gut feeling it's more to do with navigati... (show quote)

I think you may be correct I have scrolled down the page and found a couple that are very similar in ivory, as my father served in India this may have been made there. again many thanks Julian

Jan 29, 2013 05:30:27 #

Carl A Loc: Homosassa FL

Looks like a old drafting tool

Jan 29, 2013 05:35:36 #

Julianmpb Loc: DurhamUK

I thought that it was a scale rule originally but I cant scale anything from this .I am also a draughtsman.Thanks for your interest and help.

Jan 29, 2013 05:39:34 #

Nikonman Loc: Harrogate. North Yorkshire. UK

Used for Measuring speed. Velocity and acceleration

Jan 29, 2013 05:56:42 #

Julianmpb Loc: DurhamUK

Nikonman wrote:

Used for Measuring speed. Velocity and acceleration

Thanks for that Nikonman have you any idea how to use it ?

Jan 29, 2013 06:20:59 #

alf85 Loc: Northumberland, UK.

Try this site, scroll down to Sector's.
Alf.

sliderulemuseum.com/Rarities.htm

Jan 29, 2013 06:21:36 #

alf85 Loc: Northumberland, UK.

Try this site, scroll down to Sector's.
Alf.

sliderulemuseum.com/Rarities.htm

Jan 29, 2013 07:09:11 #

Julianmpb Loc: DurhamUK

alf85 wrote:

Try this site, scroll down to Sector's.
Alf.

sliderulemuseum.com/Rarities.htm

Many thanks Alf I have been to that site and have found out just about all I need to know. It never ceases to amaze me how much info can be obtained from UHH.

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