Can you explain more? I’m not sure I follow.
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Marcin Wichary Retweeted Marcin Wichary
Not sure what you mean by “pre-stencil” and how it connects. Is that a different machine than this?https://twitter.com/mwichary/status/1037571972291391489 …
Marcin Wichary added,
Marcin Wichary @mwicharyReplying to @mwichary @ElCoopacabra @rupees1hundredA few decades later, a small company called Electromatic worked on an electric typewriter. An electric typewriter helps you in swinging the typebars – you need to touch the key gently, and the electrically-powered rolling bar does the rest of the work. pic.twitter.com/ZUx9o4SrxG1 reply 0 retweets 0 likes -
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Replying to @mwichary
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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This is… weird.pic.twitter.com/ZGmiiMcYs5
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