Talk:Tuomas Vohlonen
![]() | This article is rated Start-class on Wikipedia's content assessment scale. It is of interest to the following WikiProjects: | |||||||||||||||||||||||
|
Untitled
[edit]I have found this claim concerning Vohlonen in several places. I cannot understand the claims being made about his inventing the liquid compass. Edward S. Ritchie holds several U.S. patents pertaining to the liquid compass he invented and shortly after sold in quantity to the U.S.Navy. Many of these compasses were "portable" as they were often gimbaled in a wooden box. Oh, by the way, Ritchie's patents preceed those of Vohlonen by almost 70 years! — Preceding unsigned comment added by 74.245.44.199 (talk) 01:35, 26 May 2007 (UTC)
- I corrected it. It was most likely an oversimplification in wording. Ritchie did not invent the first working liquid-filled compass; Sir Edmund Halley did, in 1690, though it was only a rudimentary demonstration model. Francis Crow received a patent for a working liquid mariner's compass in 1813, and Capt. F.O. Creagh-Osborne received a 1915 patent for a pocket-size liquid compass suitable for land navigation & routefinding by individuals afoot or on horseback - for which the bulky Ritchie marine compass was entirely unsuitable. Vohlonen's patent was nevertheless a real breakthrough. In the early 1930s, more than one person/company was attempting to perfect a compact, inexpensive, lightweight sealed-capsule liquid compass (which did not require yearly servicing), but only Vohlonen's included key innovations on the method of sealing the compass housing inside a unitary material (celluloid), which proved necessary to successful mass production. This led directly to the modern compact liquid-damped compass of today.Special:Contributions/Don01 (talk) 16:04, 24 November 2008 (UTC) — Preceding unsigned comment added by 12.72.119.38 (talk) 16:04, 24 November 2008 (UTC)
External links modified (January 2018)
[edit]Hello fellow Wikipedians,
I have just modified one external link on Tuomas Vohlonen. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:
- Added archive https://web.archive.org/web/20080216024046/http://www.suunto.com/suunto/Worlds/outdoor/main/outdoor_article_normal.jsp to http://www.suunto.com/suunto/Worlds/outdoor/main/outdoor_article_normal.jsp
When you have finished reviewing my changes, you may follow the instructions on the template below to fix any issues with the URLs.
This message was posted before February 2018. After February 2018, "External links modified" talk page sections are no longer generated or monitored by InternetArchiveBot. No special action is required regarding these talk page notices, other than regular verification using the archive tool instructions below. Editors have permission to delete these "External links modified" talk page sections if they want to de-clutter talk pages, but see the RfC before doing mass systematic removals. This message is updated dynamically through the template {{source check}}
(last update: 5 June 2024).
- If you have discovered URLs which were erroneously considered dead by the bot, you can report them with this tool.
- If you found an error with any archives or the URLs themselves, you can fix them with this tool.
Cheers.—InternetArchiveBot (Report bug) 21:27, 25 January 2018 (UTC)
- Start-Class biography articles
- Start-Class biography (science and academia) articles
- Unknown-importance biography (science and academia) articles
- Science and academia work group articles
- WikiProject Biography articles
- C-Class articles with conflicting quality ratings
- C-Class Finland articles
- Low-importance Finland articles
- All WikiProject Finland pages