2431 door hold open wedge
2432 pipe holder, for threading or cutting off lengths of pipe
2433 bartenders shotglass for use at the TB sanitarium
2434 I hope it doesn't turn out to be a prostate checker
2435 totally no clue, sorry
2436 some kind of rubber roller from a machine
2436: It's the outside of an antique ashtray that firestone used to give
out as an advertising gimmick. It's missing the middle tray.
My answer was going to be that it's a salesman's sample tire, which is what
the owner of it told me in an email when he sent it. But I think your
answer is correct, I did a search on ebay for 'firestone ashtray' and found
over fifty various types listed. Thanks!
Posting from rec.crafts.metalworking as always.
2431) This looks like a bottle opener for the crimped caps
which used to be common on soda and beer bottles.
2432) A crimper for ferrules on hoses -- likely hydraulic
or compressed air hoses, though it could be water hoses as well.
2433) I don't see any *practical* use for this, but it could be a
demonstration of the effects of eddy currents if the ball
contains a strong permanent magnet, and the shaft is a good
electrical conductor, like copper or silver (perhaps coated
to appear to be a different metal). If the ball is raised and
then released, it would fall very slowly.
2434) I would like an alternative view of the tip, but assuming that
it is a screwdriver bit, that makes this a speed screwdriver,
operated by moving the end in a small circle. No good for high
torque like installing a wood screw, but nice for moving a small
long machine screw in or out its full length, and then switch to
another more normal screwdriver for tightening.
2435) A home made device for crimping a seam -- such as perhaps a
standing seam roof covering, where two adjacent sheets of metal
have edges like this: (Use a fixed pitch font like Courier to
avoid the distortion which would come from variable pitch fonts.
| | |
| | |
The top of the left piece would really be more of a 'U' than the
square, but that is more difficult to draw. In any case, after
the sheets of metal are laid down on the roof, a tool is used to
crimp the open 'U' tightly onto the upright straight piece, to
form a water-tight seal. Normally, such a roof has many such
The seam would not be crimped down quite a tightly as the closed
image shows -- but likely the about what the gap would be if the
two pieces of wood formed a straight line.
2436) This looks like the outer race of a Timken style tapered roller
bearing bonded to a rubber outer ring to minimize transmission
of vibration to the mount.
I don't know whether the irregular groove in the OD is
intentional to make a softer cushion, or an artifact of
disintegration and wear. A more direct view of the edge might
make this clear.
Given the size, I would suggest that it is likely to be for
something like a railroad passenger car or something similar.
Now to post this, and then see what others have suggested.
2434 is an early can opener. The spike was driven into the center of
the can top and the offset allowed moving the cutter wheel down to the
can edge. It is interesting to note that there were no can openers
patented until over 40 years after the cans were being made and used.
One of the earliest was used by US Civil war troops.
Polytechforum.com is a website by engineers for engineers. It is not affiliated with any of manufacturers or vendors discussed here.
All logos and trade names are the property of their respective owners.