Posting from the usenet newsgroup rec.crafts.metalworking as
3115) I'll bet that the central pin is spring loaded, so when
pressure is applied, it allows the two blades to contact the
Anyway -- It is held in an old style brace (from "brace and bit"
days), and it is used to cut two concentric circles to form a
ring gasket in a gasket material, which may be leather, cork,
rubber, or even cardboard.
3116) My guess:
Intended for holding cylindrical or ball-shaped objects to be
held against a moving sanding surface
3117) Hmmm ... the two threaded parts on the ends are separate from
the rod, and I suspect that the rod threads into them, based on
the knurled surface near each end.
I also suspect that the threads securing each end to the rod are
opposite, so when the rod is turned between them, it adjusts the
space between the two ends a bit.
At a pure guess -- it is a tool for determining the requited
length of stay rods in something like a steam boiler. (A lot of
these join opposite surfaces in a boiler to take the stress of
the high pressure steam.
At a guessed diameter of the rod of about 1/4", I doubt that it
would be strong enough to be used directly as a stay rod.
3118) Part of a trap.
At a guess -- for minnows or some similarly small fish. Take a
mason jar, put something which minnows like inside, screw on the
lid, and sink it in the river. (Put on a string so you can
recover it, of course). Minnow can swim in between the points,
but can't reverse direction to get back out.
3119) A linkage to set a scale for various products in a basket.
I suspect that it in part compensates for the weight of the
basket. You set the pointer to the amount you want, and lock it
down, and then fill the basket until another pointer points to
an index mark -- or until something shuts off the flow of the
product to the container.
3120) A device for twisting a few wires or strings together.
You slide them into the slot, and then push the handle rotating
the slot about one full turn, or perhaps 1-1/2 turn. I think
that it is pretty close to a single turn, counting teeth on the
exposed sections of both rack and pinion.
Perhaps it is for twisting the neck of a bag to seal it?
Now to post and then see what others have suggested.
I'm not sure if it's for any particular depth or not, maybe someone else will
They have all been answered correctly this week, though I'm still looking for a
good reference for the lathe chucks.
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