George W. N. Yost Typewriter Patent Model

This typewriter patent model was used by George W.N. Yost in his patent application that received patent number 408,061 on July 30th, 1889. The patent claimed several improvements to typewriter machines including a combination of the carriage and line-spacing apparatus with a lever used for line and letter spacing, the “combination of two extra key levers and connecting rods with the platen transverse reciprocating apparatus of a type-writing machine and a series of key-levers for operating the type-bars located between said extra key-levers.”