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  • Machine For Grinding Telescope Specula -

    Machine For Grinding Telescope Specula W. Forgan The simple addition to an ordinary lathe for the purpose of grinding telescope specula has been of so much benefit to the author that it was thought, if made known through the medium of the Society of Arts, it might become useful to others interested.

  • NO. XVII. MACHINE FOR GRINDING AND POLISHING

    2013-4-8  "NO. XVII. MACHINE FOR GRINDING AND POLISHING LENSES AND SPECULA FOR TELESCOPES" is an article from Transactions of the Society, Instituted at London, for the Encouragement of Arts, Manufactures, and Commerce, Volume 50.. View more articles from Transactions of the Society, Instituted at London, for the Encouragement of Arts, Manufactures, and

  • machine for grinding telescope specula - Garage Maus

    Build Your Own Telescope , Mirror-O-Matic grinding machine When I decided in 2009 after a ten-year break to get into mirror making again, . telescope grinding machine - vegesnafoundationorg. Machine For Grinding Telescope Specula - ChestofBooks W Forgan The simple addition to an ordinary lathe for the purpose of grinding telescope specula ,

  • grinding machine telescope - belgiumdivingschool.be

    Rough Grinding a 20" Quartz Telescope Mirror on the Fixed-Post Machine This video shows how to setup a mirror grinding machine for fixed-post grinding, also known ,... know more # Diy Telescope Mirror Grinding Machine

  • Description of a Machine for Polishing Specula,

    Description of a Machine for Polishing Specula, c, with Directions for its Use; together with Remarks upon the Art of Casting and Grinding Specula, and Description of a Twenty-foot Newtonian Telescope equatoreally mounted at Starfield, near Liverpool.

  • Telescope Grinding Machine - philippelange.be

    Telescope Grinding Machine. FOB Reference Price: Get Latest Price Grinding machine for large telescope mirrors.Grinding machine for large telescope mirrors.I designed and built a grinding machine for mirrors up to 42 inches 1.1m in diameter.By slipping on and off a couple of belts, the machine can quickly be reconfigured for spinning work or for stroking work.

  • I. On polishing the specula of reflecting telescopes ...

    It is no part of the object of this paper to disparage or supersede that machine, as with it he has polished many specula sensibly perfect, some of which are now in his possession, in whose surfaces he can find no imperfection whatever, and which he should vainly attempt to improve; but it possesses scarcely power enough for polishing a two ...

  • Hand speculum grinding/polishing machine

    Hand speculum grinding/polishing machine constructed and used by Sir W. Herschel for polishing specula of 6-inch aperture.

  • Strasbaugh polishing and grinding machine Astromart

    Strasbaugh polishing and grinding machine. You wont find very many of these around. Strasbaugh is the premier manufacture of machines used by the professionals. This machine is solid no plastic or wood. You can adjust the spindle and eccentric speed with a turn of a knob while running. It makes mirror grinding a pure joy.

  • Grinding Machine for Large Telescope Mirrors

    2017-8-9  Grinding Machine for Large Telescope Mirrors. I designed and built a grinding machine for mirrors up to 42 inches [1.1m] in diameter. By slipping on and off a couple of belts, the machine can quickly be reconfigured for spinning work or for stroking work. The machine can also work smaller mirrors if the drip pan is moved to the fast shaft on ...

  • Hand speculum grinding/polishing machine

    Hand speculum grinding/polishing machine constructed and used by Sir W. Herschel for polishing specula of 6-inch aperture.

  • Lassell, W. 1799-1880 (William) [WorldCat Identities]

    Description of a machine for polishing specula, with directions for its use : together with remarks upon the art of casting and grinding specula, and a description of a twenty-four-foot Newtonian telescope, equatoreally mounted, at Starfield, near Liverpool by W Lassell ( Book )

  • Use specula in a sentence specula sentence examples

    Rogeri Baconis Anglici de Arte Chymiae Scripta (Frankfort, 1603) - a collection of small tracts containing Excerpta de Libro Avicennae de Anima, Breve Breviarium, Verbum Abbreviatum, 3 Secretum Secretorum, Tractatus Trium Verborum, and Speculum Secretorum; (5) Perspectiva (1614), which is the fifth part of the Opus Majus; (6) Specula Mathematica, which is the fourth part of the same; (7) Opus ...

  • The Production of Spherical Surfaces By Abrasion. Part

    In the figuration of small specula by hand, the metal is usually attached by cement to a temporary back, which serves as the support during the grinding and polishing, and is removed before the speculum is placed in the telescope, but even with small specula there is always some risk of distorting or breaking the speculum in the act of detaching the back, and it is therefore at all times the ...

  • William Herschel's Lathe - Practical Machinist

    2013-2-13  Machine For Grinding Telescope Specula. 02-13-2013, 05:21 AM #10. Asquith. View Profile View Forum Posts Visit Homepage Diamond Join Date Mar 2005 Location Somerset, UK Posts 5,066 Post Thanks / Like Likes (Given) 645 Likes (Received) 1893. Rivett,

  • In-situ roundness measurement and correction for pin ...

    Based on a physic model formed from the JS-53A grinding test machine for emery cloth or paper, a grinding simulation system was constituted for emery cloth or paper grinding test.

  • Stellafane Links Page

    The Stellafane Links Page is edited by Jay Drew of the Springfield Telescope Makers. * Member of the Springfield Telescope Makers Page last revised on Tuesday October 01, 2019 with 62 new links added and 173 dead ones purged.

  • The Telescope: Herschel, John Frederick William ...

    作者: John Frederick William Herschel
  • Stellafane Links Page

    Stellafane External Links provide links to related information on Amateur Telescope Making, Mirror Making, Optics, other Astronomy clubs and local area links to the Springfield, Vermont area.

  • On the construction of a silvered glass telescope;

    1 条评论
  • William Herschel's Lathe - Practical Machinist

    2013-2-13  Machine For Grinding Telescope Specula. 02-13-2013, 05:21 AM #10. Asquith. View Profile View Forum Posts Visit Homepage Diamond Join Date Mar 2005 Location Somerset, UK Posts 5,066 Post Thanks / Like Likes (Given) 645 Likes (Received) 1893. Rivett,

  • how to grind a telescope mirror with an electric

    2018-3-6  »how to grind a telescope mirror with an electric grinder »pocket size snuff powder grinder »hydration process in portland cement »portland cement suppliers in the philippines »cement content required for 1 cubic meter concrete; Project Case Mining Production Line Construction

  • Three 19th Century American Telescope Makers -

    2019-1-21  Refracting telescope, comet seeker, 8¼-inch aperture, 61-inch wooden tube, fitted for equatorial mounting, but without mount. 317027: 2. Machines, tools, and partially completed instruments from the shop of Henry Fitz, of which the major pieces are: Lens grinding machine: 315152: Lens polishing machine: 315153

  • Stellafane Links Page

    The Stellafane Links Page is edited by Jay Drew of the Springfield Telescope Makers. * Member of the Springfield Telescope Makers Page last revised on Tuesday October 01, 2019 with 62 new links added and 173 dead ones purged.

  • 22923231 - Virtual International Authority File

    Description of a machine for polishing specula, with directions for its use ; together with Remarks upon the art of casting and grinding specula, and a description of a twenty-four-foot Newtonian telescope, equatoreally mounted, at Starfield, near Liverpool: On polishing the specula of reflecting telescopes, 1874: Oxford DNB

  • History Ireland

    A steam driven grinding machine was then used for figuring the mirror into the required parabola shape, taking up to two months to complete the task. It was important to get the shape right to ensure that all light falling on the mirror was focused at a single point—an essential requirement for any telescope

  • Full text of "On the construction of a silvered glass ...

    Full text of "On the construction of a silvered glass telescope, fifteen and a half inches in aperture, and its use in celestial photography" See other formats

  • John Hadley Encyclopedia

    2020-5-24  Hadley, John(b. Hertfordshire, England, 16 April 1682; d. 14 February 1744)optical instrumentation.Hadley was the son of George Hadley, a deputy lieutenant and, after 1691, high sheriff of Hertfordshire, England, and Katherine Fitzjames.

  • On the construction of a silvered glass telescope;

    1 条评论
  • Ars Specula: Humans/Ex Machina (plus Mr Robot ...

    A story is a machine that kills fascists. A story is a machine that kills whatever you want it to. (The Last War in Albion Book Two, Part Six: Before Watchmen: Minutemen) Myriad Universes: The Return of Okona Volume 2; Belated Comics Reviews (August 19th, 2015) Turning the

  • how to grind a telescope mirror with an electric

    2018-3-6  »how to grind a telescope mirror with an electric grinder »pocket size snuff powder grinder »hydration process in portland cement »portland cement suppliers in the philippines »cement content required for 1 cubic meter concrete; Project Case Mining Production Line Construction

  • 1911 Encyclopædia Britannica/Telescope - Wikisource,

    2020-6-22  Such speculum metal is exceedingly hard and brittle, takes a fine white polish, and when protected from damp has little liability to tarnish. The process of casting and annealing, in the case of the specula of the great Melbourne telescope, was admirably described by Dr Robinson in Phil. Trans., 1869, 159, p. 135. Shaping, polishing and ...

  • Search our collection Science Museum Group

    Hand speculum grinding/polishing machine constructed and used by Sir W. Herschel for polishing specula of 6-inch aperture. Hand speculum grinding/polishing machine constructed and use Astronomy. 1780-1820 ... Newtonian reflecting telescope with an 8-inch speculum mirror of 10-foot focal length with wooden tube and altazimuth stand plus ...

  • On the Construction of a Silvered Glass Telescope -

    2016-11-19  If the glass had, after one of these experiments, been immediately put on the polishing machine and re-polished, the changes in surface would to a certain extent have become permanent, as in Chinese specula, and the mirror would have required either re-grinding

  • History Ireland

    A steam driven grinding machine was then used for figuring the mirror into the required parabola shape, taking up to two months to complete the task. It was important to get the shape right to ensure that all light falling on the mirror was focused at a single point—an essential requirement for any telescope

  • John Hadley Encyclopedia

    2020-5-24  Hadley, John(b. Hertfordshire, England, 16 April 1682; d. 14 February 1744)optical instrumentation.Hadley was the son of George Hadley, a deputy lieutenant and, after 1691, high sheriff of Hertfordshire, England, and Katherine Fitzjames.

  • Colocation Broadband Wireless Dedicated Servers

    2004-7-28  A Galilean telescope used in projection is limited in field by the clear aperture of the eye lens. ... was a remarkable craftsman scientist. His work related to telescopes includes grinding specula, with assistance from James Nasmyth William Lassell, the largest mirror a 13 inch, of 10 foot focus. ... He designed built a grinding machine ...

  • Full text of "American Machinist, Volume 57 1922"

    search Search the Wayback Machine. Featured texts All Books All Texts latest This Just In Smithsonian Libraries FEDLINK (US) Genealogy Lincoln Collection. Books to Borrow. Top American Libraries Canadian Libraries Universal Library Community Texts Project Gutenberg Biodiversity Heritage Library Children's Library.

  • Bibliography Printed works related to the history of

    2013-11-16  Sky Telescope 63 (May 1982) 446-448 (correction, 64:213). Stoner, Peter W. A Twenty-inch Telescope for the Pasadena Junior College. Publications of the Astronomical Society of the Pacific 41 (Dec. 1929) 361-364. (#244) (20 inch fork mounted Howell Sherburne Newtonian / Cassegrain, 9 inch Ritchey reflector)

  • Ars Specula: Humans/Ex Machina (plus Mr Robot ...

    A story is a machine that kills fascists. A story is a machine that kills whatever you want it to. (The Last War in Albion Book Two, Part Six: Before Watchmen: Minutemen) Myriad Universes: The Return of Okona Volume 2; Belated Comics Reviews (August 19th, 2015) Turning the