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An Asbury Mechanism opens and closes the breech of heavy artillery for reloading with a projectile and bags of propellant. It was widely used for naval artillery of the world wars and similar coastal artillery and railway guns. The device was invented at the Washington Navy Yard in 1916 by draftsman Dorsey Frost Asbury. It is sometimes called a Smith-Asbury mechanism by the United States Navy in recognition of Asbury's supervisor, Lieutenant Commander George Leonard Smith, USN.

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  • Asbury mechanism (en)
  • Mécanisme Asbury (fr)
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  • An Asbury Mechanism opens and closes the breech of heavy artillery for reloading with a projectile and bags of propellant. It was widely used for naval artillery of the world wars and similar coastal artillery and railway guns. The device was invented at the Washington Navy Yard in 1916 by draftsman Dorsey Frost Asbury. It is sometimes called a Smith-Asbury mechanism by the United States Navy in recognition of Asbury's supervisor, Lieutenant Commander George Leonard Smith, USN. (en)
  • Un mécanisme Asbury permet d’ouvrir et de fermer la culasse de l'artillerie lourde pour son rechargement avec un projectile et des sacs de poudre. Il fut largement utilisé par l'artillerie navale, l'artillerie côtière et les canons ferroviaires durant les guerres mondiales. Le mécanisme fut inventé au chantier naval de Washington en 1916 par le dessinateur Dorsey Frost Asbury. Il est parfois appelé mécanisme Smith-Asbury par la marine américaine en mémoire du superviseur d'Asbury, le capitaine de corvette George Leonard Smith. (fr)
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  • http://commons.wikimedia.org/wiki/Special:FilePath/Figure415_Stepped-thread_interrupted-screw_breech_block.png
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  • An Asbury Mechanism opens and closes the breech of heavy artillery for reloading with a projectile and bags of propellant. It was widely used for naval artillery of the world wars and similar coastal artillery and railway guns. The device was invented at the Washington Navy Yard in 1916 by draftsman Dorsey Frost Asbury. It is sometimes called a Smith-Asbury mechanism by the United States Navy in recognition of Asbury's supervisor, Lieutenant Commander George Leonard Smith, USN. Large caliber breech-loading artillery became practical with French development of the obturator by Charles Ragon de Bange in 1872; and speed of reloading was improved by adaptation of the interrupted screw breech plug, which was later further improved by Axel Welin in 1890 as the Welin breech block and adopted by the Swedish. Asbury used gearing to fully open a Welin breech by linking the unscrewing, withdrawing and swinging clear movements into one continuous action. (en)
  • Un mécanisme Asbury permet d’ouvrir et de fermer la culasse de l'artillerie lourde pour son rechargement avec un projectile et des sacs de poudre. Il fut largement utilisé par l'artillerie navale, l'artillerie côtière et les canons ferroviaires durant les guerres mondiales. Le mécanisme fut inventé au chantier naval de Washington en 1916 par le dessinateur Dorsey Frost Asbury. Il est parfois appelé mécanisme Smith-Asbury par la marine américaine en mémoire du superviseur d'Asbury, le capitaine de corvette George Leonard Smith. Le chargement par culasse de l'artillerie à gros calibre devint possible avec le développement de l'obturateur par le français Charles Ragon de Bange en 1872. La vitesse de rechargement fut améliorée par l'adaptation suédoise du filetage interrompu par Axel Welin en 1890 connue sous le nom de bloc de culasse Welin. Asbury utilisait l'engrenage pour ouvrir complètement une culasse Welin en reliant les mouvements de dévissage, de retrait et d'ouverture en une action continue. (fr)
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