What is it? Set 546

I'll speculate that this is a control to adjust room heat for old convection hot-air heating systems. I note the control wire/string (10,11 in the patent drawing) that would go down to set a damper in the duct providing hot air to the room(s). All the open space in the structure suggests that this is a cover for (one of) the hot air input duct(s) in the room(s) being regulated.

My pleasure, to help out. So many specialized tools out there, and it's nice to recognize one, now and again.

It's possible this is english or french. The fellow wearing the phrygian cap (representing a french revolutionist circa 1800) is being choked by a brit wearing a tri-corner cap. As for its purpose? possibly for holding ink.

"Alexander Thesoso" <

Perhaps for controlling the coal burning furnace air intake? Close it a bit to cool the fire or open up the intake for more heat. There is no restriction in the flue above the fire in a coal burner.

Alexander Thesoso wrote in news:lln75f$gp3$ snipped-for-privacy@dont-email.me:

Actually, one side says "draft open" and the other side says "crack open"

"Phil Kangas" wrote in news:llnkt7$hs1$1@dont- email.me:

Makes sense when you consider the labels "draft open" and "crack open" on the dial.

Also:

It's *obviously* a reproduction antikythera device. See? no kytheras around here!

Yes, it's a draft regulator for a furnace, more information on it can be found by following the patent link that I posted with the answers for this set:

Thanks everyone!

Rob

HAH! Got one! Makes my day, ay?

Well, I'm zero for the week. Thanks for posting the answers. Glad I was able to help with the cylinder popper.