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From Fig. 2 (Sheet 2) of United States Patent 436,532, September 16, 1890. Ottmar Mergenthaler. "Machine for Producing Linotypes, Type-Matrices, &c." All U.S. Patent text and images are in the public domain. This version was presented online by Google. I've simply done a screen-capture from their PDF of it.
This is the plate tipped in as the frontispiece of the remarkable Manual of Linotype Typography (1923). This volume is online at http://www.archive.org/, but the present version was scanned by me from an original copy.
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