Author Topic: Another What is it?  (Read 575 times)

Offline gunna

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Another What is it?
« on: November 20, 2017, 04:54:10 AM »
I have just acquired this item and am wondering if anyone could identify it? The only marking shows that it was made in England but nothing else. It is made to sit on a flat surface as shown while the thumb screw at the right hand end allows levelling via the bubble level alongside it. The large tubular screw? at the left allows the rise and fall of the scope by about +/- 5 degrees. The calibration marks go to +/- 140 in unit increments. There are no crosshairs or other target in the scope but the image is inverted and has quite a bit of magnification. There is also a pair of open sights on the top for initial sighting.
Any ideas?
Ian.

Offline Kim

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Offline gunna

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Re: Another What is it?
« Reply #2 on: November 20, 2017, 07:39:21 AM »
Kim,
I thought the same originally, but it has no provision for traverse, ie a turntable or similar. It is only designed to move up and down.
Thanks,
Ian.

Offline michaelr

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Re: Another What is it?
« Reply #3 on: November 20, 2017, 09:10:42 AM »
It looks like a builders Dumpy level used for setting out on building sites.

Mike.

Offline Lew Hartswick

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Re: Another What is it?
« Reply #4 on: November 21, 2017, 08:57:12 PM »
There was an instrument used on a "table" to make a 'sort of' map, I can't remember the name, that looked like that. I never saw one but heard about them and the description matches. I thought they would have had some sort of cross-hair in it though. It was used by sighting on the distant object and drawing a line on the table along the side of the base of the instrument. Using various distant objects at different angles ......  Etc :-)   I think I came across this thing/description when I was into "caving" back in about 1957 or 8 so it's no wonder I can't remember the name. :-)
   ...lew...

Offline gunna

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Re: Another What is it?
« Reply #5 on: November 22, 2017, 05:52:53 AM »
I think I know the sort of device you are describing, Lew. Not in this case however as the base is decidedly triangular in shape so the sides are not parallel with the scope. I will revise my comment about no crosshair. I have just removed the eyepiece end of the scope and there is a carrier with only vertical adjustment for a horizontal target hair but no actual hair.
I am still intrigued by the large calibrated adjuster.
Ian.

Offline Jasonb

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Re: Another What is it?
« Reply #6 on: November 22, 2017, 07:56:09 AM »
Some kind of inclinomiter for setting out shallow falls maybe for road, rail or drainage use?

Offline Ian S C

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Re: Another What is it?
« Reply #7 on: November 22, 2017, 10:08:39 AM »
Could it be military.  Ian S C

Offline BillTodd

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Re: Another What is it?
« Reply #8 on: November 22, 2017, 12:04:47 PM »
Some kind of inclinomiter for setting out shallow falls maybe for road, rail or drainage use?

I'd go with this :-)   Drainage falls are usually  1:40 to 1:110  so fitting in with the calibration numbers on the dial.

Bill
Bill
wy omnibus Latinis taurus stercore?

Online Jo

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Re: Another What is it?
« Reply #9 on: November 22, 2017, 02:11:50 PM »
Its an artillery scope  ;)

Jo
Usus est optimum magister

Offline BillTodd

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Re: Another What is it?
« Reply #10 on: November 22, 2017, 04:34:31 PM »
Its an artillery scope  ;)

Jo

It'd have a wider range of angle at least 0-45 degrees
Bill
wy omnibus Latinis taurus stercore?