ꯐꯥꯏꯜ:Middletown milling machine 1818--001.png
ꯃꯁꯤꯒꯤ ꯄ꯭ꯔꯚꯤꯌꯨ ꯑꯁꯤꯒꯤ ꯁꯥꯏꯓ: ২২০ × ৬২ ꯄꯤꯛꯆꯦꯜꯁ. ꯑꯇꯩ ꯔꯤꯁꯣꯂꯨꯁꯟ: ৬৯০ × ১৯৫ ꯄꯤꯛꯆꯦꯜꯁ.
ꯐꯥꯏꯜ ꯑꯁꯦꯡꯕ (৬৯০ × ১৯৫ ꯄꯤꯛꯆꯦꯜꯁ, ꯐꯥꯏꯜ ꯆꯥꯎꯕꯒꯤ ꯆꯥꯡ: ২৫ KB, MIME ꯃꯈꯜ: image/png)
ꯑꯇꯦꯟꯕꯥ ꯁꯟꯗꯣꯛꯅꯥ ꯇꯥꯛꯄꯥ
| ꯁꯟꯗꯣꯛꯅꯥ ꯇꯥꯛꯄꯥMiddletown milling machine 1818--001.png | Line drawing of a milling machine in use in a firearms factory in Middletown, Connecticut, USA, by 1818. It was described by E.G. Parkhurst, who had seen it in 1851 and gathered information about it then from Robert Johnson, who dated it to 1818. Another of the people associated with its development is Simeon North. It has often been described as "the first milling machine", as has another contemporary machine long credited to Eli Whitney and dated circa 1818, although today's scholarship in the history of technology makes clear that milling practice and equipment evolved from rotary filing gradually enough, and among enough builders, that it cannot be said with accuracy that the builders of this machine "invented" the milling machine. One of the interesting aspects of this machine is its striking similarity (through modern eyes) to a turret lathe headstock and front slide, minus the rest of the lathe. These echoes underscore the mixing and matching of machine elements that characterizes machine tool innovation. Such recombining would produce the turret lathe some 25 years later. |
| ꯆꯩꯆꯠ |
circa ꯱꯸꯹꯰ date QS:P,+1890-00-00T00:00:00Z/9,P1480,Q5727902 s-1910s |
| ꯍꯧꯔꯛꯐꯛ | Original unknown. Known to have been published and borrowed for republishing repeatedly at least by 1906 and probably before. Appeared in the American Machinist journal and several books. |
| ꯄꯨꯊꯣꯛꯂꯤꯕ ꯃꯤ | Unknown authorUnknown author |
| ꯑꯌꯥꯕ ꯂꯧꯕ (ꯃꯁꯤꯒꯤ ꯐꯥꯏꯜꯁꯤ ꯑꯃꯨꯛ ꯍꯟꯅꯥ ꯁꯤꯖꯤꯟꯅꯕꯥ) |
PD-US |
ꯑꯌꯥꯕꯥ
| Public domainPublic domainfalsefalse |
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This work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 100 years or fewer.  You must also include a United States public domain tag to indicate why this work is in the public domain in the United States.
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| This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. | |
https://creativecommons.org/publicdomain/mark/1.0/PDMCreative Commons Public Domain Mark 1.0falsefalse
ꯐꯥꯏꯜꯒꯤ ꯄꯨꯋꯥꯔꯤ
ꯆꯩꯆꯠ/ꯃꯇꯝꯗ ꯅꯝꯃꯨ ꯃꯇꯝ ꯑꯗꯨꯗ ꯐꯥꯏꯜ ꯑꯗꯨ ꯎꯅꯕ
| ꯆꯩꯆꯠ/ꯃꯇꯝ | ꯈꯨꯠꯄꯤꯈꯨꯖꯤꯟ | ꯄꯥꯛ ꯆꯥꯎꯕꯥ | ꯁꯤꯖꯤꯟꯅꯔꯤꯕ | ꯑꯄꯥꯝꯕ ꯐꯣꯡꯗꯣꯛ ꯎ | |
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| ꯍꯧꯖꯤꯛꯀꯤ | ꯰꯴:꯴꯴, ꯱꯴ ꯖꯨꯂꯥꯏ ꯲꯰꯱꯰ |  | ৬৯০ × ১৯৫ (২৫ KB) | smartcommons>Three-quarter-ten | {{Information |Description=Line drawing of a milling machine in use in a firearms factory in Middletown, Connecticut, USA, by 1818. It was described by E.G. Parkhurst, who had seen it in 1851 and gathered information about it then from Robert Johnson, who |
ꯐꯥꯏꯜꯒꯤ ꯁꯤꯖꯤꯟꯅꯐꯝ
ꯃꯁꯤꯒꯤ ꯐꯥꯏꯜ ꯁꯤ ꯁꯤꯖꯤꯟꯅꯕ ꯂꯃꯥꯏꯁꯤꯡ ꯂꯩꯇꯦ ꯫
