L.M. Clement Turntable Drive U.S. Patent #427,970, May 13, 1890
Were you familiar with Lewis Clement's turntable drive patent? I tripped across it, and thought I'd pass it along in case you hadn't seen it.
Turntable Drive - Clement, Watriss & Heynemann May 13, 1890 427,970 - Oakland & San Francisco