Mr. Christopher Latham Sholes, the inventor of the QWERTY keyboard, was also unsatisfied with QWERTY, and tried to improve the keyboard arrangement in 1880's. On his improved keyboard Mr. Sholes placed the vowels in "home row" of the right hand, and frequently-used consonants, T, N, S, H, R, and D, in its above row (shown below, taken from U. S. Patent No.568630). After Mr. Sholes died, however, his patents were assigned to Mr. Clarence Walker Seamans, the first president of the Union Typewriter Company. Mr. Seamans, who pushed forward the oligopoly of QWERTY, never released Mr. Sholes' improved keyboard to the market.
Sholes was also unsatisfied with QWERTY 不満足なショールズ
QWERTYに代わる新しいキー配列 - yasuoka の日記