Item 238 looks a bit like an electroscope, but from the photo, there is
a lot that can not be seen. The foremost question is," is there a gold
leaf attached to the central hanging thing (or should there be)? What
is electrical isolated from what and how well? Do the side things slide
and are the hollow, with lenses? If the answers are yes to these
questions, this could be an electroscope used to measure ionizing
radiation. I have seen electroscopes mostly like this but with only one
The more I look at 1338, I wonder if it is indeed aa metal-foil
electroscope. Typically these have very thin pieces of metal foil
suspended from a central conductor. The center piece in this looks way too
thick to be an electroscope. Does the center piece move; can it pivot from
side to side? Are the two terminals on the sides adjustable? Is it
possible this is a tilt switch of some sort?
All I know is what I see. 25 cycle power, using a BIIIIIIIGG brake to
govern the speed of the generator. Brake is operated by fly-ball
governor. Whether or not synchronous clocks were "invented" in 1916,
they sure were not in regular use is common practice. Heck, I still
do have a pendulum clock that keeps good time.
The way to regulate it accurately is to drive a clock with the current and
compare the time of the clock to an accurate time source (like the sun).
For the clock problem, the short term frequency is not as important as the
long term average frequency. So when the clock is running behind, you just
speed up the system a bit until it catches up. The fact that the frequency
is only accurate to 5% is not important if you can keep the long term
average accurate which is easy enough to do just by driving a synchronous
clock from the power.
I was once told that the above is what power companies actually did (at
some point in history). Don't have a clue if it's true however.
I sent some similar questions to the guy who emailed the photo to me, but
never got a reply. I think that the device belongs to a friend of his and
it's not available for him to take a closer look.
1339: a tool for drawing a particular truncated triangle?
1340: 90-degree rolling pin
1341: Worlds poorest fondue set
1342: Used for spreading pipe
1343: Elevator shaft key. (yeah, I always guess that)
There's no such thing as a free lunch, but certain accounting practices can
result in a fully-depreciated one.
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