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2. Welin breech block - Wikipedia

   en.wikipedia.org/wiki/Welin_breech_block

   The Welin breech block was a revolutionary stepped, interrupted thread design for locking artillery breeches, invented by Axel Welin in 1889 or 1890. Shortly after, Vickers acquired the British patents. Welin breech blocks provide obturation for artillery pieces which use separate loading bagged charges and projectiles. In this system the ...

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. 41 cm/45 3rd Year Type naval gun - Wikipedia

   en.wikipedia.org/wiki/41_cm/45_3rd_Year_Type...

   Third year type refers to the Welin breech block on which design began in 1914, the third year of the Taishō period. This breech block design was also used on the 20 cm (7.9 inch), 15.5 cm (6.1 inch), 14 cm (5.5 inch), 12.7 cm (5 inch), and 12 cm (4.7 inch) naval guns.

5. Breechblock - Wikipedia

   en.wikipedia.org/wiki/Breechblock

   A typical break-action, double-barreled shotgun. A way of closing the breech or chamber is an essential part of any breech-loading weapon or firearm.Perhaps the simplest way of achieving this is a break-action, in which the barrel, forestock and breech pivot on a hinge that joins the front assembly to the rear of the firearm, incorporating the rear of the breech, the butt and usually, the ...

6. 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 ...

7. 14 cm/50 3rd Year Type naval gun - Wikipedia

   en.wikipedia.org/wiki/14_cm/50_3rd_Year_Type...

   "Third year type" refers to the Welin breech block on this gun. Breech-block design began in 1914, the third year of the Taishō period. This breech-block design was also used on Japanese 40 cm (16 inch), 20 cm (8 inch), 15.5 cm (6 inch), 12.7 cm (5 inch), and 12 cm (4.7 inch) naval guns. [2] This gun was not mounted aboard submarines.

8. Axel Welin - Wikipedia

   en.wikipedia.org/wiki/Axel_Welin

   He was married to Agnes Welin from 1889. Axel Welin studied at the Royal Institute of Technology in Stockholm from 1879 to 1884. Between 1886 and 1888, Welin worked as a weapons designer for Thorsten Nordenfelt in London. In 1889 he started his own engineering firm, the Welin Davit & Engineering Company Ltd. He soon designed the famed Welin Breech.

9. 6-inch/53-caliber gun - Wikipedia

   en.wikipedia.org/wiki/6-inch/53-caliber_gun

   United States naval gun terminology indicates the gun fired a projectile 6 inches (15 cm) in diameter, and the barrel was 53 calibers long (barrel length is 6 inch x 53 = 318 inches or 8 meters.) [2] The gun with side swing Welin breech block and Smith-Asbury mechanism weighed about 10 tonnes and used a silk bag containing 44-pounds (20 kg) of smokeless powder to give a 105-pound (47.6 kg ...