Editing Welin breech block
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− | The ''' | + | The '''Welin breech block''' is a stepped, [[Interrupted thread|interrupted thread]] breech, <!-- interrupted screw breech --> invented by [[Axel Welin]] in 1889 or 1890. Shortly after, [[Vickers]] acquired the British patents. |
Though the US Navy was offered the design a year or two later, they declined and the American Bethlehem Steel spent the next five years in trying to circumvent Welin's patent, before having to buy it through Vickers. | Though the US Navy was offered the design a year or two later, they declined and the American Bethlehem Steel spent the next five years in trying to circumvent Welin's patent, before having to buy it through Vickers. |