The designs of Gustav Adolf Sachs. The 1886 Patent he got when he was in Valley City in the Dakota Territory, Patent No. 353,432 granted Nov. 30, 1886 --

https://docs.google.com/viewer?url=patentimages.storage.googleapis.com/pdfs/US353432.pdf

By 1893 he was in Eugene, Oregon, when he was granted U.S. Patent No. 495,639 on Apr. 18, 1893 --

https://docs.google.com/viewer?url=patentimages.storage.googleapis.com/pdfs/US495639.pdf

I couldn't find an 1894 Patent for Sachs, but the 1894 date might refer to Willis Ostrander of San Francisco, Patent No. 531,132?