brass item need ID

[Ifoundit69]

I had this peice laying around in my junk not sure what it is ... it measures 4 1/4 inches long solid brass with gear like teeth on the inside .. with the letters B&C on the back and a small stamp with Y&T

 

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[TxTim]

Looks like a latch insert of some sort.

 

[Bigcypresshunter]

The picture is too large for my screen but I think the Y & T logo is Yale & Towne.

 

[vhs07]

Looks like a window sash lift. Check out the second photo on this web site:
http://www.columbusarchitecturalsalvage.com/catalog.php?category=521
It shows a decorative sash lift, made by Y & T also. If you look close, you can see
what appears to be "tracks" inside this one also.