Broadwell ring

The Broadwell ring is a small obturating ring used in 1860s and 1870s rifled breech loaders in Continental Europe to ensure obturation. American engineer Lewis Wells Broadwell who worked as sales agent for the Gatling Gun Company in Europe replaced a papier-mache obturating cup behind the bagged charge in early bag-loaded RBLs with a metallic gas ring and patented his invention in 1861, later perfecting it in 1864 and 1866; most countries paid royalties to Broadwell for the design, but in Germany the Krupp company copied it and used it without paying.

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