I do not know how something like this would be used in this context.

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Note added at 34 mins (2015-10-29 19:24:34 GMT)
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inna możliwość : square cylinder =walec kołowy prosty

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Note added at 6 hrs (2015-10-30 01:03:38 GMT)
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Precise Precision Cylinder Square
Constructed out of a single piece in the form of a cylinder.
Heat treated and precision ground.
Virtually indestructible.
Squareness: .000030" per inch.
Precision squareness checking device with use of cylindrical square.
Hardened and lapped base with 4 height positions reference ring.
Unique design allows low reach checking to 3/8".
Accepts all dovetail test indicators of 5/32".
Range 3/8" - 5".
Sensitive fine adjustment.


\http://www.lighttoolsupply.com/catalog/Category/Precision-To...

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Note added at 16 hrs (2015-10-30 11:20:16 GMT)
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Magnetic cylinder square
In the making of acurate parts, for example, by machining, it is often necessary to check the squareness of a part. In one method of checking squareness, a square block is clamped to a surface which is at right angles to a base plate and the square block is then used as a reference.
It is an object of this invention to provide a novel square which may be readily applied to a surface for use as a reference in gaging squareness.
http://www.google.com/patents/US2971261
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. squares and cylinder squares may be used for checking large work. Figure 6.16 shows a typical cylinder square.
https://books.google.com/books?id=0_zyli82kNAC&pg=PA171&lpg=...
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The DTI is set to zero against a master gauge such as the cylinder square shown in the ...
https://books.google.com/books?id=uxmjBQAAQBAJ&pg=PA54&lpg=P...


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Note added at 16 hrs (2015-10-30 11:35:25 GMT)
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Per discussion:

Kątownik walcowy MKSm-A 500 kl.0 G RAFAN
http://narzedziomis.pl/katownik-walcowy-mksm-a-500-kl-0-g-ra...