How about for extracting spent primers? Put the shell base
down, put in a piece which slides in the upper sleeve and has a pin at
the bottom end to push the primer out between the tines of the fork.
For this to work, we want the bore of the upper sleeve to be machined
The size is not clear enough to be sure whether it is for
something smaller and short like handgun cartridges, or somewhat larger
and longer like shotgun shells.
There are test images available for download which are usually a
bar of gray steps from fully white to fully black. You display one of
these and adjust the brightness and the contrast so you can just barely
tell the end steps from the next one in from that end. That should give
you a standard setting -- and then the problem is whether everyone else
has bothered to do the same sort of thing. Such is important when
processing digital images (from digital cameras or scanned from chemical
Even better is if you also have the ability to adjust the gamma
(the curve from the darkest end to the lightest end) to a standard.
CRTs have a different gamma by default than LCD or plasma monitors, so
the adjustment needs to be made for each.
There are things available for calibrating monitors (at least
one is called a "spider") which is good if you have a driver program for
it for your OS. They are available for Windows and Macs, but harder to
find for machines like my Sun workstations. So I have to set the
contrast and brightness first, and then adjust the gamma by a command
line option to get a known good image to look good on my screen.
Here is a URL for a site which walks you through the calibration
(and warns you about thinks to avoid):
It looks like a good one for me to get -- and use at least on my Mac, if
not on my Suns.
Posting from my desktop PC, as always.
2719, too dark to get much an idea what we're seeing.
2720, broken porcelean from a spark plug.
2721, too dark to see.
2722, no clue. From the picture of the old vehicle in the background,
something vehicle related? Acetylene gas generator?
2723, no clue.
2724, pictures too dark to see well. Maybe a bottle corker.
Christopher A. Young
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I need some help with the last one in this set:
Posting from Rec.crafts.metalworking as always.
2719) Perhaps a coin box for some kind of transportation setup,
like a horse-drawn trolley perhaps?
2720) A screw-on insulator of some sort -- perhaps old post and stud
house wiring, or perhaps telephone wiring from the telephone
2721) It looks like the top of a fence post -- with holes to allow two
rail fences to meet at right angles. And perhaps specifically
for horses with riders to jump over, before they started making
them with rails which were easy to knock off.
Perhaps sawn off to use as a guide in making a replacement
corner fence post.
2722) It sort of looks like a holder for a galena crystal and a
catwhisker (in the ball-socketed arm above) for a crystal radio.
Is there a coil wound around the barrel? Too late at night for
me to take time to save an image and brighten it up.
Or perhaps there is a coil inside it, given the springs to make
it easy to take apart.
2723) A tool for making round holes in thin sheet metal. You drill a
hole to pass the screw, select the right size backing plate to
go on the other side, tighten the nut, and then turn the upper
part with a wrench and tighten the nut as the rollers force a
groove into the metal.
2724) Perhaps a tool for loading wads and shot into a shotshell and
crimping it closed.
Also -- with additional parts -- for pushing out the spent
Time to go to bed. I'll read the other suggestions tomorrow
sometime. A busy day today.
2721: I don't know how they wired temporarily in the knob-and-tube days.
To provide power for a construction crew, this could have kept two
circuits from touching where they crossed. Ceramic insulators may or
may not have been put through the four holes. On each side of the
block, you might put a spacer to keep the two conductors in a circuit
farther apart. You'd thread the conductors through the block and
spacers, hoist it up where workers wouldn't hit it accidentally, and
pull the conductors tight.
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