OldTools Archive
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278275 | sushimonster | 2024‑02‑26 | Help with an unknown item - possibly maritime? |
Hi all, I have come across this item/tool for which I'm at a loss as to it's use. I'm making an assumption that because it has the word "Aft" it means toward the rear of a boat - but assumptions are quite often wrong, especially mine. Anyone seen one of these before? It's 9 cm high, and has lift-able flaps on all four sides. Each flap covers 9 small holes that go all the way through the block to the opposite side. It also has a removable block with a brass plate top which also has 7 holes arranged in a daisy wheel formation. https://s3.eu- west-1.amazonaws.com/ric.rr.uploadarea/m4hQjur096dgRT5thaer/Unknown/aft01.jpg https://s3.eu- west-1.amazonaws.com/ric.rr.uploadarea/m4hQjur096dgRT5thaer/Unknown/aft02.jpg https://s3.eu- west-1.amazonaws.com/ric.rr.uploadarea/m4hQjur096dgRT5thaer/Unknown/aft03.jpg https://s3.eu- west-1.amazonaws.com/ric.rr.uploadarea/m4hQjur096dgRT5thaer/Unknown/aft04.jpg https://s3.eu- west-1.amazonaws.com/ric.rr.uploadarea/m4hQjur096dgRT5thaer/Unknown/aft05.jpg |
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278278 | Marvin Paisner <paisners@s...> | 2024‑02‑26 | Re: Help with an unknown item - possibly maritime? |
Taking a long shot here, but it may be for holding the metal compensating rods used to adjust a ship's magnetic compass that has been thrown off by the vessels metal construction. Just a guess. Marv Paisner Kootenay Lake, BC -----Original Message----- From: sushimonster via groups.io Sent: Monday, February 26, 2024 4:30 AM To: oldtools@g... Subject: [oldtools] Help with an unknown item - possibly maritime? Hi all, I have come across this item/tool for which I'm at a loss as to it's use. I'm making an assumption that because it has the word "Aft" it means toward the rear of a boat - but assumptions are quite often wrong, especially mine. Anyone seen one of these before? It's 9 cm high, and has lift-able flaps on all four sides. Each flap covers 9 small holes that go all the way through the block to the opposite side. It also has a removable block with a brass plate top which also has 7 holes arranged in a daisy wheel formation. |
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278279 | John Ruth <johnrruth77@g...> | 2024‑02‑26 | Re: Help with an unknown item - possibly maritime? |
> On Feb 26, 2024, at 12:31 PM, Marvin Paisner |
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278280 | Kirk Eppler | 2024‑02‑26 | Re: Help with an unknown item - possibly maritime? |
Can't find Marvin's response, except in the archives, but it sounds reasonable, so I'll respond to John's response to Marvin's theory. For those who don't know, here is a section on how its done, but nothing noting storage for the magnets https://www.google.com/books/edition/Elements_of_Navigation_Chart_Lead_Log_De/M0 VLAAAAMAAJ?hl=en&gbpv=1&dq=marine+compass+compensation++rod+storage&pg=RA2-PA21& printsec=frontcover Kirk in Half Moon Bay On Mon, Feb 26, 2024 at 10:41 AM John Ruth |
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278281 | Marvin Paisner <paisners@s...> | 2024‑02‑27 | Re: Help with an unknown item - possibly maritime? |
Galoots, An online search finds that "WF Stanley" manufactured ships compasses and the link below reports a Patt. 1135 "moulded type corrector". https://collection.sciencemuseumgroup.org.uk/documents/aa110099165/g30-govrm- drwgs-pattern-1135-moulded-type-corrector I believe the corrector box would hold the rods and magnets used to "swing" the compass on a large steel hulled vessel. While a magnetic compass is usually mounted in a binnacle there are occasions when it is suspended overhead from brackets in a gimbal. I worked on such a vessel and the corrector rods for our magnetic compass were mounted in a wooden box overhead just aft of the compass gimbal. Our box was a much simpler arrangement that the one in "sushimonster's" photos. For anyone interested in compass "swinging" I have linked the article below. I had the pleasure of being on watch in the wheelhouse when Captain Barber swung our compass shortly before his retirement. A true master and very friendly fellow. https://professionalmariner.com/swinging-a-compass/ Marv Paisner Kootenay Lake, BC -----Original Message----- From: Kirk Eppler via groups.io Sent: Monday, February 26, 2024 2:48 PM To: John Ruth Cc: Marvin Paisner ; musashisakai@y... ; oldtools@g... Subject: Re: [oldtools] Help with an unknown item - possibly maritime? Can't find Marvin's response, except in the archives, but it sounds reasonable, so I'll respond to John's response to Marvin's theory. For those who don't know, here is a section on how its done, but nothing noting storage for the magnets https://www.google.com/books/edition/Elements_of_Navigation_Chart_Lead_Log_De/M0 VLAAAAMAAJ?hl=en&gbpv=1&dq=marine+compass+compensation++rod+storage&pg=RA2-PA21& printsec=frontcover Kirk in Half Moon Bay On Mon, Feb 26, 2024 at 10:41 AM John Ruth |
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278283 | sushimonster | 2024‑02‑27 | Re: Help with an unknown item - possibly maritime? |
As ever you guys are just the best. Marvin, John & Kirk - thanks for all that great info! I had no idea adjustment of a ships compass would be necessary for such reason - and absolutely no idea it would be done in this way. And - under all the grey paint, everything is, as speculated - brass. Great contributions all. I now have another interesting factoid I can produce when the moment calls for it :) |
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278286 | John Ruth <johnrruth77@g...> | 2024‑02‑28 | Re: Help with an unknown item - possibly maritime? |
GG's: For decades, the U.S. Navy Hydrographic Office issued a hardbound handbook for magnetic compasses. A quick search revealed that it has been superseded by an on-line pdf file from a different agency: download ( https://msi.nga.mil/api/publications/download?key=16920950/SFH00000/H oMCA.pdf&type=view ) PDF Document · 2 MB ( https://msi.nga.mil/api/publications/download?key=16920950 /SFH00000/HoMCA.pdf&type=view ) ( https://msi.nga.mil/api/publications/download?key=16920950/SFH00000/HoMCA.pdf& type=view ) John Ruth Metuchen NJ |
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