According to R.H. :
Another set has been posted:

http://puzzlephotos.blogspot.com/

O.K. Posting from rec.crafts.metalworking again.

472) Hmm ... it looks like a variation on a magnetic parallel
for holding things higher than the surface of the magnetic chuck
on a surface grinder.

Most that I have seen had the aluminum (or brass or bronze) body
the full height of the magnetically soft (mild steel) pole
pieces. In any case, they transfer the magnetic poles of the
chuck to the higher level. (There are also V-blocks made
similarly.)

Others are alternating plates of brass and steel, riveted
together by brass rods.

I would guess that "J. BRACKEN" is the name of the person who
made this as part of his apprenticeship program.

473) contact pins and shell end of a fluorescent lamp tube.

474) I think that this is an internal remote grabber. It probably
has a spring loaded plunger which expands the fingers unless
the plunger is depressed from the other end, allowing it to be
inserted into the object being grabbed, or to release said
object.

475) A trepaning wood bit. The screw tip at the center pulls
it into the wood workpiece, and the outside legs cut a circular
groove until it falls through the workpiece. It is limited as
to how deep it will make a hole, simply because it does not have
the sharp edges between the center screw and the outer cutters
of a typical auger bit to shave wood out of the center of the
hole, so the cross-pieces will eventually hit and prevent any
farther progress.

However, the lack of those center cutters will reduce the amount
of torque which the operator will need to apply to the handles.

476) This looks like yet another variety of can opener.

477) A "card" for wool, perhaps? Designed to straighten out the
fibers prior to spining, and to make it easier to separate
from the dirt which comes with the sheep.

Now -- to see what others have guessed.

Enjoy,
DoN.
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