3071 is an adjustable hole cutter for a brace-and-bit type drill. That
looks to have a much easier to use clamp than the one I had. As ever,
several of the others look horribly familiar but I've no idea what they
Correct, these are used for cutting gaskets. The person who sent the photo would
like to know why there is only one blade on this tool when typically gasket
cutters have two blades as seen at the link below.
No need for something running as slow as a brace-and-bit driven
one -- and easier to adjust for size if you are making a single cutout
at a time -- like to clear a piston/cylinder in a head gasket. (In a
drill press, you would want two cutters at the same radius to minimize
off-center weight vibration.)
Now -- with two cutters, you have two choices:
1) For a single hole -- either carefully adjust both cutters to
the same radius from the pivot point, or remove one of the
cutters. (If the latter was done with the one in the puzzle, it
might have been lost over the years.
2) For making a ring gasket -- adjust one for the OD and the other
for the ID. Probably best done with them on opposited sides of
the pilot. Two cuts at the same time.
Someone just sent me the photos at the link below, I don't plan on posting them
the site but maybe someone here can identify it. The owner said that it appears
that the tip is broken.
I used to make temporary survey pins from 1/2" copper pipe and nails.
I'd cap a 3" piece of pipe, solder the head of a 3" nail to the cap, and
put a band of red reflective tape around the pipe.
I'd stick the nail into the ground. I could center a plumb bob over the
top, and I could sight it from a distance.
The mystery device might have served a similar purpose. The long pin
could be inserted into the ground without much resistance. The bullseye
marks might have been to sight from shorter ranges. For longer ranges,
it might have been rotated so that the solid marks would appear centered.
Not sure if this is right but I'll send it to the owner along with the rest of
the guesses for it. I already sent him the ice pick theory and he thought the
steel might not be strong enough for that, but maybe the tool was not well made.
Well ... the engraving in it looks like typical scrimshaw
engraving. (especially the bands at the ends of the ivory). Not sure
whether that is whale tooth ivory or elephant ivory, however.
If the round dots are copper, then it is work of the Copper
Eskimos. They tended to decorate their scrimshaw with embedded copper.
If scrimshaw, it could be intended to be purely decorative,
rather than functional.
3068 looks to be an old WECO telephone transfer relay. Not the rotary
stepper sort, but just a multi-pole double-throw type.
3069 is obviously a belt-hung 22-cal ammunition dispensor -- ostensibly for
the breech-break guys. (I have one, Savage O/U 22/.410, my original 50's
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