The 1929 patent https://patentimages.storage.googleapis.com/fa/19/23/cfd441637a2027/US1818200.pdf … just refers to varying velocity with Shift, not by individual key
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https://patentimages.storage.googleapis.com/11/03/a6/cf2a9bedbbae12/US1775057.pdf … also refers only to varying by Shift, as does https://patentimages.storage.googleapis.com/29/1e/41/dedfa21f1bbe9d/US1937047.pdf …
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The @/¢ key is shown in perforator patent, https://patentimages.storage.googleapis.com/be/32/4c/00d28039116925/US1873511.pdf … (as is the /? key). Shift-minus is ¾pic.twitter.com/vrZVsBS6eQ
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Another manual-style keymap shown in https://patentimages.storage.googleapis.com/29/92/b6/91bbcf266b0fc9/US1940156.pdf …pic.twitter.com/9HYc8p1xJ4
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Replying to @enf
Thought: Is there a reason they would intentionally/mistakenly show old layout on the patent?
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Replying to @mwichary
Might be cheaper/easier to reuse old drawings than to make new ones? Another manual-style keyboard shown in https://patentimages.storage.googleapis.com/f2/5a/91/45eede4d2abff7/US1873554.pdf …, perhaps the same drawing as before
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Here comes one about uniform impression, but it's about making keypresses that also drive a bookkeeping tally mechanism still have the same impression on the page as ordinary keys https://patentimages.storage.googleapis.com/20/c6/bb/f8ba6ace2dcdde/US2089310.pdf …
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This one still seems to be sensitive only to Shift: https://patentimages.storage.googleapis.com/03/e2/01/e35e8479813231/US1945097.pdf …. Another one about heavier load from bookkeeping mechanisms: https://patentimages.storage.googleapis.com/00/8d/7a/161aa05ab9c701/US1934338.pdf …
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A little off-topic, but an interesting one about a mechanism for typing in boldface: https://patentimages.storage.googleapis.com/89/b4/6c/c2742873e6c464/US1987276.pdf …
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Also off-topic, but there's a bitmap font encoded in the drawings for this one: https://patentimages.storage.googleapis.com/33/ab/bb/bec1c58efb41fc/US2043707.pdf …pic.twitter.com/WrMmlJocgu
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