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  2. Welin breech block - Wikipedia

    en.wikipedia.org/wiki/Welin_breech_block

    Note the four separate thread "steps" on the block which engage with matching steps in the breech when the block is swung up and inwards and rotated slightly clockwise. The Welin breech block was a revolutionary stepped, interrupted thread design for locking artillery breeches, invented by Axel Welin in 1889 or 1890.

  3. Interrupted screw - Wikipedia

    en.wikipedia.org/wiki/Interrupted_screw

    Axel Welin solved this problem with his stepped interrupted screw design: the Welin breech block of 1890. This design has threads of the block and breech cut in steps of successively larger radius. For example, this allows a breechblock with four steps to allow four-fifths of the block circumference to be threaded, allowing for a much shorter ...

  4. Charles Ragon de Bange - Wikipedia

    en.wikipedia.org/wiki/Charles_Ragon_de_Bange

    The only major advance on the original de Bange system was the introduction of the stepped screw in the Welin breech block of 1889, which greatly increased the load-bearing surface of the breech, allowing them to be made shorter, simpler, more secure and faster to operate. Other block mechanisms are also used, but the de Bange obturator remains ...

  5. Asbury mechanism - Wikipedia

    en.wikipedia.org/wiki/Asbury_mechanism

    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. [2]

  6. 14-inch/45-caliber gun - Wikipedia

    en.wikipedia.org/wiki/14-inch/45-caliber_gun

    All guns employed a Welin breech block and used a Smith-Asbury mechanism, and, in the case of the Mark 12, chromium plating was introduced to prolong barrel life. These improvements enabled the guns to fire heavier 1,500 lb (680 kg) shells, and increasing the gun mount elevation to 30 degrees [ 2 ] extended the range of the guns to 36,000 yd ...

  7. High-yield savings rates for January 16, 2025 - AOL

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  8. Threading (manufacturing) - Wikipedia

    en.wikipedia.org/wiki/Threading_(manufacturing)

    In manufacturing, threading is the process of creating a screw thread.More screw threads are produced each year than any other machine element. [1] There are many methods of generating threads, including subtractive methods (many kinds of thread cutting and grinding, as detailed below); deformative or transformative methods (rolling and forming; molding and casting); additive methods (such as ...

  9. Mortgage and refinance rates for Jan. 16, 2025: Rates hit ...

    www.aol.com/finance/mortgage-and-refinance-rates...

    See today's average mortgage rates for a 30-year fixed mortgage, 15-year fixed, jumbo loans, refinance rates and more — including up-to-date rate news.