![]() ![]() ![]() Although the perfected version relies on ductile metals rather than the material de Bange started with suet. The main French contribution was de Bange’s “elastic” breech seal, the one we’re familiar with on things like 16″/50 naval guns using bagged charges from WW2. The rotating breechblock/bagged charge breech was largely a French invention, although the original “pipe cap” style rotating breech block was the work of Joseph Whitworth in Britain, used with a metallic cartridge. Going back to the late 1860s, with the advent of the metallic cartridge, Krupp opted for the sliding block breech/rimmed metallic cartridge combination on grounds of simplicity of manufacture, plus durability and reliability in service.
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