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Posted: 11/8/2022 9:07:06 AM EDT
I was tasked with re-threading the cap, milling off damaged hammer marks and fixing that thread and fixing the damaged tip.
It has an inner level with a cap and feels like some sort of liquid inside or weight with spring. Judging by the damage it had I assume some type of punch but I have no idea. Attached File Attached File |
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I think maybe it started life as a plumbob but the knurling suggests it needs to be gripped tightly and the mushroomed lip and damaged tip show it was used to hammer something and the inertia type weight inside that shakes has me baffled.
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Quoted: I think maybe it started life as a plumbob but the knurling suggests it needs to be gripped tightly and the mushroomed lip and damaged tip show it was used to hammer something and the inertia type weight inside that shakes has me baffled. View Quote Unscrew the brass color part and run the line through the center is how it's set up. There was probably a little ball on the end of the line that goes in there, or just a knot maybe. The hole in the top is to center the line. It looks like about .61 cal, maybe you should buy a black powder musket to shoot it. |
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Fun fact: Don’t rely on a plumb bob near the Himalayas. The mass of the mountains will give an inaccurate reading.
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If it is still used as a plumbbob I will ask the guy, I did not try and make the tip perfect, just used a hand file on the lathe instead of setting up on the angle or would that matter?
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Its a plumb bob. Whatever you charged is more than the thing is worth. lol
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Fuck is wrong with y’all? Right answer immediately?
This place is slipping…. |
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The Wu Xian Dynasty of early China (1430's or so) was known to have the world's most advanced metalurgy, which they springboarded into advanced firearms manufacture, thus cementing their dynasty for hundreds of years. I think what you have is some sort of advanced, high-caliber prototype. Note the ingenuity practiced in the fine rifling, and the precision of the stainless (???) ogive. The brass endcap was changable for range and fine load development, which shows a serious understanding of aerodynamics. Maybe it was an anti-cavalry artillery piece, but I have seen studies that show palace decorations illustrating that a respected warrior samurai would use this as a sniper weapon to clear castle battlements of defenders before the siege engines and ladders and whatnot was brought up.
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Quoted: People don’t know what a plumb bob is? View Quote Guys used to take shop class in Jr High and High School. Several years ago, I learned there is (or was) a trendy title used on social media for a type of person - "Maker", which is somebody that makes something, often some pointless thing like a fidget spinner. Must be something similar to 'in a world of blind people, an individual with one eye, near-sighted, and with cataracts, is a king'. |
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It is a staple puller. For very specialized spherical staples. I think they were only ever used by NASA, Pratt Whitney, and Earl Scheib.
Very rare to see one in the wild. |
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Quoted: Quoted: Fun fact: Don’t rely on a plumb bob near the Himalayas. The mass of the mountains will give an inaccurate reading. lol. It’s true. https://xue-lin.com/2-14-do-mountains-have-roots-surveying-the-himalayas-of-india-with-a-plumb-bob https://royalsocietypublishing.org/doi/10.1098/rspl.1857.0096 |
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Quoted: I think maybe it started life as a plumbob but the knurling suggests it needs to be gripped tightly and the mushroomed lip and damaged tip show it was used to hammer something and the inertia type weight inside that shakes has me baffled. View Quote Mercury inside increases the overall density of the plumb bob and adds damping to stop the motion quicker. |
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Quoted: People don’t know what a plumb bob is? View Quote In this Idiocracy-bound country? I’d guess 1-2% know. I still remember a moment in math class when the teacher used one for some experiment or demonstration. He asked, “Anyone know what this is called?” I answered, and everyone else in the class looked at me like I’d made it up. The teacher was very proud of me. I’d learned what it was from an episode of Mr. Wizard’s World. |
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Quoted: Show us the inner assembly. The innards might be a spring loaded hammer for center punching a mark with the plumb bob. Maybe it didn't work well enough, so a hammer was applied. View Quote |
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Machinist buttplug
The knurling gives you traction to prevent losing it in the butt |
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If the thing inside is hard, it may be a bead to tie the string onto after you thread it through the cap.
I doubt the fluid inside is Mercury, but it might be. I kinda remember Mercury not getting along too well with brass. |
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If you took Doc Brown's DeLorean back to Egypt 6000 years ago, even they would recognize it as a plumb bob.
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