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What is this ??????

Sorry BJ, but it looks like some type of "indicater" <img src="/metal/html/lol.gif" border=0 width=15 height=15 alt=":lol"> . I aint got a clue but someone on here will...d2
 
No idea what a Trill indicator is but it looks like a very old instrument to record some process variable. The back cylinder probably had a chart wrapped around it and the pointer traced a line to record the changes in the process.
Look at the end of the pointer. If there is a small horizontal triangular shaped thing with the end towards the cylinder that is pointed, this is the pen. A few drops of ink would be placed in the cavity and the pen would trace a line as the cylinder rotated.
The group of coiled things are probably range selectors for various ranges to be recorded. If they are hollow they may be for pressure. If they are a thin strip of metal see if one side is a little rusty. If so, they are probably bimetallic and used to show local temperature.
You may contact me off line if I am close in my guesses and you want more information. I am a retired instrument engineer.
Lee MI-MI
 
BJ
Doing some checking, the Trill Indicator Co. of Corry, PA, was involved in WWII in providing services to the ship building industry, apparently those involved in building Liberty ships. A "trill" is a vibration or shaking (one definition) and the sheet that you provided a copy of shows the blanks on the sheet provided a diagram from a "blank" engine, "blank date and year" "blank" diameter of cylinder in inches, length of stroke "blank" in "blank" end.Revolutions per minute "blank"etc., etc., so the "instrument" may have measured vibrations(?) of an engine... If you can check with any company involved with ship building or engine testing, they may provide more info. Hope this helped...
 
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