Posting from Rec.crafts.metalworking as always.
2485) A stylus (phonograph needle) pressure gauge. A fairly old one,
given that there are two scales. The grams (red) scale is right
for higher quality turntables and the Ounce scale (blue or
black).
Note the two dimples in the flat spring -- the first quite near
the end which is clamped, and the other perhaps 3/4" or 1" up
from it.
The dimple closer to the clamp bar and screws is for the ounces
scale, the one farther from them is for the grams scale. The
needle is pressed in the appropriate dimple and the flat spring
deflects to tell the stylus force.
2486) Intersting. Brass for weight. Knurled surface rollers for
rolling something (adhesive tape, perhaps) into firm contact.
The ball end could be used as a hammer to perhaps soften the
surface a bit. The other end, with the cavity would not be good
for hitting most things.
Could it perhaps be for patching inner tubes or tires casings?
2487) A seriously old phonograph tone arm -- purely acoustical, and
likely from a wind up (spring driven) turntable. The needle
moves a metal diaphragm through leverage, and the sound from
that diaphragm travels through the hollow jointed arm (which
increases in diameter and joins a tapered horn inside the
housing to amplify the sound and feed it to the listeners.
I'm not sure, but I suspect that the stylus force from this one
is above the range of the gauge in (2485) above.
2488) I don't know for sure, but I suspect that this is designed
to open tin (food) cans, and then to serve as a handle on the
opened (and likely heated) can -- say for cooking beans over a
campfire. :-)
2489) Perhaps to strap to the legs of an animal (cattle, horse,
whatever) to control wandering?
2490) Looks like some form of mailbox -- except for all the
ventilation.
Given the unmounted telegraph key beside it, it may be part of a
museum exhibit of communications devices and systems, so it
might be for a carrier pigeon.
Sort of looks like some kind of image projector behind it. A
bit large (and old) for 35mm slides, but it may work with some
older "magic lantern" slides.
Now to send this off, and then see what others have suggested.
Enjoy,
DoN.
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