2306 is a telcom tool commonly called a 216B, used on binding posts
in protectors,terminals and old style crossconnects (B-boxes in them
olden times.) One can be seen here (scroll to the middle of page):
Posting from Rec.crafts.metalworking as always -- and a little
earlier than usual:
2305) Old gunsmith's tool for generating rifling in a rifle barrel. A
cutter is mounted on the small diameter section, the barrel
clamped in the wood "tombstones", and as the operator draws it
by the handle at the end, the spiral grooves in the larger
diameter wood part rotate the cutter as it is drawn through the
2306) Tool for two sizes of adjustment screws clamped by nuts. The
outer part of the tool is used to release the clamp nut, and
then the screwdriver part is advanced and used to make the
The most common use of these in my experience was for adjustment
potentiometers in aircraft electronics so the vibration common
to piston engined planes would not change the adjustments in
2307) This is an interesting device. The decorated part suggests
that it is for music, and this would make the windup part
likely to be a metronome -- but the way it sits on the table
suggests that it is supposed to be that way (adjustable feet and
all), and then it might be something which moves the wire frame
relative to text or music over time to force reading or playing
at a certain speed. The music or text may be wound around the
cylinder behind the wire frame.
2308) As to *what* this is -- that is clear. it is an iris
However, mounting it in that red cover is uncommon. It is
normally built within lens (and often shutter) assemblies. This
might be used in an optical bench for adjusting illumination.
The numbers are multipliers for the amount of light (thus the
open area) relative to the fully closed position (1) in which it
I guess that it could be used to control air flow instead of
2309) No real clue on this one. It does seem that the split toothed
part was welded on as an afterthought.
2310) A nice old tool -- perhaps intended to bring an edge down to
flush with an adjacent surface.
Is the shown surface of the file the fine or the coarse side?
That could help tell whether it is for filing wood or metal.
Also, is the other surface double-cut as the shown one is?
Now on to see what others have suggested -- and back later this
evening to see other suggestions.
Yes, it was created for use with electrical equipment.
You're correct that it's music related, though it's not used as suggested
above. Someone looking to identify this item sent me the photos, turns out
that it's missing a part that would make it easier to figure out.
This isn't for use with any kind of optics or air flow.
I agree that it looks like someone modified this tool.
I'll ask the owner and will post his reply when I get it.
Definitely! I appreciate the explanation! I couldn't "see" it..
Any idea how many times would the cutter need to be worked through the
inside of the barrel to get the desired result? And who thought of
rifling! : )
A lot. I have done this with a modern version of the tool, which was a piece
of 5/8" square bar that we twisted by putting one end into a BIG shop vise,
and two pipe wrenches on the other end. But it twisted quite evenly. (1:48,
IIRC). It runs through a square hole in a piece of steel plate, with lots of
I've only made a rifled barrel for a muzzleloading pistol with it, but my
old friend, whose project it was, made a rifle barrel for a deer rifle. He
started with a smoothbore blank from Dixie.
For cutters, I used a stack of hacksaw blade pieces cut out with a Dremel,
using the thin silicon carbide cutoff wheels. After each couple of passes of
the rifling tool we shimmed it up 0.002" at a time to cut deeper. I rigged a
block and tackle to pull it through. Then I lapped the barrel, spending
hours of progressive lapping to get a decent finish.
Swiss or Germans. The originals were their jaeger (hunting) rifles of the
17th century (I think).
Thank you for your reply (below)! Interesting stuff. My interests seem
dangerous enough without trying to build guns... lol Actually, I bought
a muzzle loading pistol kit when I was in high school but I lacked the
woodworking savvy (and many of the other things required) to complete it
I have done this with a modern version of the tool, which was a piece
In 1975, I built a muzzle loading .69 caliber flintlock long gun in
anticipation of the 200 anniversary of the Declaration of Independence
I fired quite a few rounds through it until I ran out of lead balls. I
then discovered that a 12 gauge shotgun slug fit perfectly. I butchered
a lot of shotgun shells to continue the fun. I still have it tho the
main spring (that propels the flint striker) broke.
Since it had what looks like five grooves in the master, and it
is capable of cutting one groove in the barrel at a time (too much
cutting force for more), I would say that at least five passes for a
single depth, and perhaps four or five passes per groove to get the
I would suspect that it came from archery. The flights
(feather) on arrows are angled slightly to produce a spin which
stabilizes the arrow in flight. I suspect that they started with just
straight feathers to hold the tail behind the head, and someone by
accident tilted the feathers enough to produce a spin and noticed that
it made for more stable flight (likely comparing the feathers on several
arrows made at the same time). Once it was discovered, they
experimented until they found what angle worked best.
Once the long firearms (which started out as smoothbore, and
used patched round balls) graduated to conical bullets, they discovered
that the longer ones (which would carry more energy to the target)
tumbled, so they looked for a way to spin them too. While bullets could
have been cast with spiral grooves, actually putting the grooves in the
barrel would give a more certain spin, and thus would be used by
Note that an experimental/short-lived firearm called the
"Gyrojet" had the powder (really "propellant") inside the bullet, fired
by a central primer, and had a ring of angled holes around the primer to
give the bullet a spin.
Rifles were around for a long time before conical bullets, Don. The original
Swiss and German jaeger rifles used round lead balls -- with no patches.
They used a hammer to hit the end of the ramrod, driving an oversize ball
down the rifling.
The Foxfire books have an excellent explanation of the process. The
scraping took many repeated passes, raising the cutter minutely on each
pass. The spiral block was the key to repeatability.
If you are unfamiliar with the foxfire series, here is some information:
well writtten and fascinating. such a marvelous undertaking to capture the
knowledge of the Appalachians before its last practitioners died.
And another answer makes a good case that it was for terminal
blocks used by the telephone company. Whether it could be used on the
locknuts for the potentiometers which I suggested would depend on the
size of the hex openings in the ends.
Intersting. The music relationship seems obvious from the lyre
shape and the decoration, but the rest does need more parts to identify
(though I did not save the larger image and zoom in (and adjust the
gamma) to make some areas more visible). Of course, familiarity with
other examples could also lead to correct and full answers.
Another posting (or was that in the comments on the web site)
suggested that it could be for measuring spaghetti -- and with uncooked
straight spaghetti in parallel bundles, it could probably have the
numbers corresponding to the number of people it would serve, or the
number of ounces or something similar
[ ... ]
Thanks. A photo of the other side would be a nice touch too.
The side that is shown suggests metal filing not wood, but I could be
I would guess it is to dress the metal edge of skis, but it is not
obviously reversible as would be needed to do that. Perhaps a tool
for dressing a chainsaw bar?
Gardner Buchanan gbuchana(a)teksavvy(dot)com
FreeBSD: Where you want to go. Today.
I was going to make a wild guess that 2307 was a page-turner for sheet
music, but I couldn't see any parts to actually do this function, so I
kept my big yap shut.
On an administrative topic... For a couple of weeks, RH's initial post
has not shown up on rec.puzzles. I don't know if this is a problem with
my reader, my news server, or something with RH's posting process.
Anyone out there, who knows something about the news posting process,
got any suggestions about how I can fix things?
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.