This service document was published without copyright notice in the US at a time when such notice was required to secure copyright. It therefore passed into the public domain upon initial publication. No additional rights are asserted on this digitization. It is in the public domain.
A blueprint of the "Stop Motion" of the Thompson typecaster. This drawing is not dimensioned, so I presume that it is an operational/service print rather than a manufacturing print.
Notes
Thanks are due to Patrick Goossens for making this material available.