Conn & more engineering spec sheet free-for-all
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https://drive.google.com/drive/folders/1BqTvh7RmRAXFfp3r60yVpTWDYBpFQ9-r contains a giant collection of scans and photographs of engineering vellum sheets from none other than C. G. Conn Ltd. - sadly only a fraction of the ones ever produced/used, but still useful.
They were scanned on loan from a former UMI employee, hence the Benge/King bits, and there are a few hundred more that are too large for standard tabletop scanners that we're working on...
Why are they usually PDFs? Client wanted PDFs. I redid several as PNG or bitmap at different resolutions where potentially useful.It's a free-for-all because there is virtually no organization. Google has been performing optical character recognition every time something is uploaded, so if using a Google account, you should be able to search by topic/name/etc. Not perfect, but helpful somewhat.
The folders and subfolders are references to what each container had, so the Black Crate had hanging folders corresponding to sheet numbers, or the Market Day bag had a bunch of loose sheets presented in order, etc."Fun" items include official dates when certain designs were discontinued, a trombone date code table, 16A designs from the 1960s that were shelved, subcontracted to Yamaha as the 19A/21A, then became the 16A in 1974, a 25A/25B "Director" which was basically a 77B parts-horn, various Navy compass parts from WW2, a possible Czech spy sending stuff to Amati-Kraslice [kidding about that]...