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Captain
William Andrew Field (c. 1796–1871). In February 1833 he rescued 14 sailors from the Sicilian brig Felicita, which was wrecked on rocks at the entrance to Sandy Haven in Milford Haven for which he received the
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instrument used by navigators to draw parallel lines on charts. The tool consists of two straight edges joined by two arms which allow them to move closer or further away while always remaining parallel to each other.
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hinges. The instrument usually had two links, but longer models sometimes had three, and sometimes the links were
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In the 19th century a retired sea captain, Captain
William Andrew Field improved the design by adding a
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Fazlıoğlu, İhsan (2014). "Taqī al-Dīn Abū Bakr Muḥammad ibn Zayn al-Dīn Maҁrūf al-Dimashqī al-Ḥanafī".
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who died in 1585. However it was not in common use (at least in Europe) until the 18th century.
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points to the opposing edge, which made reading bearings easier. Examples exist of
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Parallel rule in plastic with aluminum arms lying on a
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82:-style scale to the upper edge of one rule, and
296:Mathematical Instruments - A private collection
27:Drafting instrument used to draw parallel lines
208:"Captain Field's Improved Parallel… (NAV0602)"
173:. Springer, New York, NY. pp. 2123–2126.
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325:Astronomical and navigational instruments
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171:Biographical Encyclopedia of Astronomers
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292:"Parallel rules: Rolling and bar types"
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74:Captain Field's Improved Parallel Rule
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302:from the original on 2021-07-22
243:Rootsweb, Captain Andrew Field
179:10.1007/978-1-4419-9917-7_1360
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381:. You can help Knowledge by
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357:How to use parallel rulers
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321:"Parallel rule (NAV0618)"
255:"Parallel rule (NAV0601)"
377:This naval article is a
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263:National Maritime Museum
216:National Maritime Museum
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290:Riches, D. M. (2009) .
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331:. 2009. Archived from
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218:. 2009. Archived from
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144:and a medal from the
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146:Royal Humane Society
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383:expanding it
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337:. Retrieved
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65:Taqi al-Din
38:cutting mat
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156:References
80:protractor
104:scissored
300:Archived
110:See also
48:drafting
88:boxwood
84:compass
55:History
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46:are a
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
