http://wiki.karljones.com/index.php?action=history&feed=atom&title=Alexander_Mitchell_%28engineer%29
Alexander Mitchell (engineer) - Revision history
2026-10-23T20:05:39Z
Revision history for this page on the wiki
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Karl Jones at 13:39, 6 April 2016
2016-04-06T13:39:14Z
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<td colspan='2' style="background-color: white; color:black; text-align: center;">← Older revision</td>
<td colspan='2' style="background-color: white; color:black; text-align: center;">Revision as of 13:39, 6 April 2016</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''Alexander Mitchell''', (13 April 1780 – 25 June 1868) was an Irish [[engineer]] who from 1802 was blind.</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>'''Alexander Mitchell''', (13 April 1780 – 25 June 1868) was an Irish [[engineer]] who from 1802 was blind.</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>He is known as the inventor of the [[screw-pile lighthouse]].</div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>He is known as the <ins class="diffchange diffchange-inline">[[</ins>inventor<ins class="diffchange diffchange-inline">]] </ins>of the [[screw-pile lighthouse]].</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>== Biography ==</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>== Biography ==</div></td></tr>
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<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* [[George Boole]]</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* [[George Boole]]</div></td></tr>
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Karl Jones
http://wiki.karljones.com/index.php?title=Alexander_Mitchell_(engineer)&diff=10780&oldid=prev
Karl Jones: /* External links */
2016-04-06T13:38:23Z
<p><span dir="auto"><span class="autocomment">External links</span></span></p>
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<td colspan='2' style="background-color: white; color:black; text-align: center;">Revision as of 13:38, 6 April 2016</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* [https://en.wikipedia.org/wiki/Alexander_Mitchell_(engineer) Alexander Mitchell (engineer)] @ Wikipedia</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>* [https://en.wikipedia.org/wiki/Alexander_Mitchell_(engineer) Alexander Mitchell (engineer)] @ Wikipedia</div></td></tr>
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Karl Jones
http://wiki.karljones.com/index.php?title=Alexander_Mitchell_(engineer)&diff=9724&oldid=prev
Karl Jones: Created page with "'''Alexander Mitchell''', (13 April 1780 – 25 June 1868) was an Irish engineer who from 1802 was blind. He is known as the inventor of the screw-pile lighthouse. =..."
2016-03-12T10:36:18Z
<p>Created page with "'''Alexander Mitchell''', (13 April 1780 – 25 June 1868) was an Irish <a href="/index.php/Engineer" title="Engineer">engineer</a> who from 1802 was blind. He is known as the inventor of the <a href="/index.php?title=Screw-pile_lighthouse&action=edit&redlink=1" class="new" title="Screw-pile lighthouse (page does not exist)">screw-pile lighthouse</a>. =..."</p>
<p><b>New page</b></p><div>'''Alexander Mitchell''', (13 April 1780 – 25 June 1868) was an Irish [[engineer]] who from 1802 was blind.<br />
<br />
He is known as the inventor of the [[screw-pile lighthouse]].<br />
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== Biography ==<br />
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Born in Dublin, his family moved to Belfast while he was a child, and he received his formal education at Belfast Academy, where he excelled in [[mathematics]].<br />
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Originally working in brickmaking in Belfast, he invented machines used in that trade, before patenting the screw-pile in 1833, for which he would later gain some fame.<br />
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The screw-pile was used for the erection of lighthouses and other structures on mudbanks and shifting sands, including bridges and piers.<br />
<br />
Mitchell's designs and methods were employed all over the world from Portland breakwater to Bombay bridges. Initially it was used for the construction of lighthouses on Maplin Sands in the Thames Estuary (the first light application, in 1838), at Morecambe Bay (the first completed, in 1839), and at Belfast Lough where his lighthouse was finished in July 1844.<br />
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In 1848 he was elected member of the Institution of Civil Engineers and received the [[Telford Medal]] for a paper on his invention.<br />
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In May 1851 he moved to Cobh to lay the foundation for a lighthouse on the Spit Bank. The success of these undertakings led to the use of his invention on the breakwater at Portland, the viaduct and bridges on the Bombay, Baroda and Central India Railway and a broad system of Indian telegraphs.<br />
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He became friendly with astronomer [[John Thomas Romney Robinson]], and mathematician [[George Boole]].<br />
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He died at Glen Devis near Belfast on 25 June 1868.<br />
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== See also ==<br />
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* [[Engineer]]<br />
* [[George Boole]]<br />
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== External links ==<br />
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* [https://en.wikipedia.org/wiki/Alexander_Mitchell_(engineer) Alexander Mitchell (engineer)] @ Wikipedia</div>
Karl Jones