Featured What is this tool?

My father in law was given this tool in the 1940's. It was an old tool that his uncle and fellow carpenter had. He has never seen it in use and cannot understand what it is for. It seems to be manufactured and purpose built. It has the name "Pouley" cast into the gear, however this name has not provided any help.
Your thoughts?

 

Can you provide more pictures and different angles?

 

Plus, dimensions are always helpful.

 

Need to see the business end close-up. It looks like an adjustable cutter of some kind made for close-in, perhaps tight corner, work.

 

Thank you to everyone for your help thus far. I hope these additional pictures and dimensions help. My father in law is 94 and has challenged me with identifying this tool.

 

Is the silvery piece I'm going to call the spatula, that sticks off to the side, attached to the larger gear, so that the 2 go round together? Or are they independent of each other? Could the 'spatula' stay in place while the gears turn? It has been suggested to me that the purpose was to scribe a circle onto something as part of a manufacturing process that required holes made in a uniform way. Question is how motion was imparted to gears.

Is it something FIL used in his lifetime? Inherited? Bought as a whatsis in a junk shop?

 

whoops, I didn't notice "pouley" before.

It's a valve grinder. Or so sayeth Google.

https://patents.google.com/patent/US1412964A/

 

Jivvy Mervigliosa does it again!

 

Awesome job!! I can’t thank you enough. I have searched for months without a clue.

 

the talent here is awesome....................

 

Great work, @Jivvy ! Again.

 

I knew what it was right away..but then I have a 1926 Model T too...... neat tool there , a lot more "complex" than most of them .