Talk:Jean Samuel Pauly

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Paper cases

It's a well sourced assertion that Pauly used paper cases. His metallic head was to provide obturation, not the (paper) case.

What sourcing is there that Pauly used a metal case, meaning a container to retain pressure within it by sealing against the chamber walls? A cartridge head with obturation at the head, then without a pressure differential across the walls of the rest of it, isn't a metallic cartridge casing. Andy Dingley (talk) 23:05, 25 October 2015 (UTC)[reply]

In the new reference I provided, the Smithsonian one, on page 4 it states that the cases of Pauly's cartridges were made of brass. There is also a collection of images at the end of the file, including an image of Pauly's cartridge. Tell me, does that look like a paper cartridge to you? Also, in the Jeff Kinard reference, it states on page 107 that Pauly 'replaced the paper body of the cartridge with a brass tube'. Finally, in the Roger Pauly reference it states on page 94 that 'Pauly designed several types of ammunition utilizing both full-brass casings and partial half-casings fitted to the rear of a larger paper cartridge'. It also describes the cartridge as 'metallic' on the same page. That seems like enough evidence to me to justify calling Pauly's cartridge a metallic one, or a cartridge that used a metallic casing. — Preceding unsigned comment added by SQMeaner (talk • contribs) 00:24, 26 October 2015 (UTC)[reply]

Page 8 (5 in the document) http://www.sil.si.edu/smithsoniancontributions/HistoryTechnology/pdf_hi/SSHT-0011.pdf describes Lepage's invention thus,

"Like Pauly's, the case did not provide a seal by expanding, only a mechanical one at the base."

Some of Pauly's handgun cartridges, rather than the long arm cartridges where the paper cartridge is clearly visible, have a brass base that are a proportionately longer portion of the round's overall length. But the point is that it's not sealing by the cartridge or by expansion, but by the obturation of the base. OK, so this is a "brass cartridge" because it's a cartridge and it's made of brass. But it's not the brass cartridge, or even an early example of the brass cartridge, because it doesn't yet demonstrate the significant development of it: sealing at the neck of the case by expansion and by the support of a thin-walled brass cartridge with a closely-fitting chamber. The wording of any reference needs to avoid implying that Pauly had invented such a cartridge. Andy Dingley (talk) 02:12, 26 October 2015 (UTC)[reply]

So basically, Pauly did use a brass case but it didn't provide obturation. That seems like a neat summary to me and you can feel free to add that to this page.SQMeaner (talk)