Yes. What I mean is that there were two versions of the Electromatic. The July, 1930 model had "manual" pairing, with " and ' over 2 and 8. The October, 1931 model introduced "electric" pairing. These are in the documents that I lent you that you scanned for me.
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The first version didn't care about uniform velocity for each key. They introduced the uniform velocity in the second model to avoid cutting through mimeograph stencils
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Replying to @enf
Wait, how do you know this? Just from the scans you shared with me? I don’t see all the info there, but maybe I’m not smart enough to infer.
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Replying to @mwichary
I may have misread it all this time, or there may be another source that I've forgotten after 20 years. The variable-force paragraph is in the 1931 description, but I have no proof that they didn't also do it in 1930. The 1930 *does* have an @/¢ key instead of '/" thoughpic.twitter.com/8xzdtVsDp4
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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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Yeah, it’s my understanding from reading about typewriter history that patents cannot be fully trusted – they can me intentionally misleading, filed out of order, political, etc. (That’s not to say I don’t appreciate you digging them up!!!)
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