In article ,
R.H. wrote:
Another set of photos have just been posted:

http://puzzlephotos.blogspot.com/

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

339) It looks as though it is a tool for removing/installing
(unscrewing/screwing in) 5C collets in a CNC lathe. (Except
that I'm not sure why the other three slots.)

340) Part of a latch for webbing belts. The two springs on the
sides hold the teeth lightly engaged, and the hooks below
grip more firmly when it is under load. (I think.)

341) Driver for flexible abrasive disks, perhaps? The springs
keep the flexible surface in contact with the workpiece?

342) A puzzle?

343) *This* one, I am sure about. It is a lock-out plate, used
for lockable power switches to allow multiple people working on
a piece of powered equipment to be sure that the power is off.
Each worker puts his own personal lock through one of the six
holes, and any one of the six is sufficient to keep the horns of
the ring engaged with the locking mechanism of the power switch
(called the "disconnect"). It is a safety tool.

344) An old fishing reel, of the design used before the "spinning"
reel came into use.

Enjoy,
DoN.

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