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Antiques! => Antique Questions Forum => Topic started by: taigasarus on March 19, 2013, 04:37:35 PM

Title: 1915 Clinometer/Angle of Sight?
Post by: taigasarus on March 19, 2013, 04:37:35 PM

This instrument was found at my grandfathers house several years ago, and we are wondering what it is.  All we know is that it is some kind of scientific instrument, possibly some kind of clinometer.  It has at least two mirrors/lenses inside that it looks like you can make some kind of angle with, and on the inside of the cap there is a table of tangents.  There are two additional lenses with red and green glass.  Ideally, we are looking to find out what this is, how it was used, and if it is worth anything.  In case you can't read the inscription from the pictures, it says Newton and Co, London, No 511, 1915.

Thanks!

Title: Re: 1915 Clinometer/Angle of Sight?
Post by: mart on March 19, 2013, 07:50:59 PM

Give Rauville time to look at this !!  He will probably know what it is and what its used for !!

Title: Re: 1915 Clinometer/Angle of Sight?
Post by: Rauville on March 19, 2013, 09:34:55 PM

I think we had a similar device on here a few weeks ago. Turned out to be a "Pocket Sextant".

http://www.artfact.com/auction-lot/a-bronzed-brass-pocket-sextant-by-newton-co.-of-68-c-a02c9770fe

taigasarus; Is yours marked with the military board arrow as well?

Title: Re: 1915 Clinometer/Angle of Sight?
Post by: mart on March 20, 2013, 04:05:32 AM

How large is this one ??

Title: Re: 1915 Clinometer/Angle of Sight?
Post by: bigwull on March 20, 2013, 04:16:26 AM

about the same size as the other one... ;)

Title: Re: 1915 Clinometer/Angle of Sight?
Post by: mart on March 20, 2013, 04:20:10 AM

Don`t remember Wullie !!  Care to enlighten me !! ;)

Title: Re: 1915 Clinometer/Angle of Sight?
Post by: bigwull on March 20, 2013, 04:32:54 AM

Feb 26 Micaela,s topic...
   
   
antique negretti & zambra london instrumet dont know

Title: Re: 1915 Clinometer/Angle of Sight?
Post by: taigasarus on March 20, 2013, 11:24:58 AM

Thanks Rauville, and everyone!  It does indeed appear to be a bronze pocket sextant, thanks for the tip.  Yes, it does have the military broad arrow, and from our search it indicates that it was issued to Commonwealth forces in WW1.  This makes sense from what we know about my great-grandfather, as he was a civil engineer with the Canadian Expeditionary force.  As for size, it is 2 3/4 inches across. 

On another note, does anyone have any tips for cleaning this?  As you can see, it is quite corroded.