The first of these, from 1903/1905 (US patent 787,197), is describe (in the patent) as an "improvement" to the Benton punch-cutting machine. It is clearly a modification of Benton's first style of machine. This patent was not assigned, and I do not know if the machine it describes was produced.
US Patent 787,197
US patent 787,197. "Punch-Cutting Machine." Issued 1905-04-11 to James William Lewis. Filed 1903-02-21 as application serial number 144,463.
The second machine, from 1904/1905 (US patent 798,354), also admits its Benton heritage; it appears to derive from Benton's second style of machine. The patent was not assigned, and I do not know if this machine was produced.
US Patent 798,354
US patent 798,354. "Punch-Cutting Machine." Issued 1905-08-29 to James W. Lewis. Filed 1904-06-08 as application serial number 211,649.
Lewis' third machine, from 1905/196 (US patent 839,011) was different. Also, unlike the first two machines, it is described not only as a punchcutting machine but also a matrix engraving machine. Its patent was assigned to the Keystone Type Foundry (like Lewis, this foundry was located in Philadelphia). Keystone was independent of ATF until its purchase by ATF in 1919. I have no information about whether or not Keystone actually produced this machine.
US Patent 839,011
US patent 839,011. "Pantographic Engraving-Machine." Issued 1906-12-18 to James W. Lewis. Filed 1905-11-27 as application serial number 289,215.
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