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Blickensderfer typewriter
The Blickensderfer Typewriter was designed by George Canfield Blickensderfer (1850–1917) in 1892. It was originally intended to compete with Remington desk typewriters, but ended up being known for its portability.
Instead of the common mechanism with letters on the end of individual bars connected to the keys, the Blickensderfer used a cylindrical wheel with letters embossed on it. Pressing a key caused the cylinder to turn so the correct letter was positioned over the paper, and continuing caused it to be inked by a roller as it moved to press down on the paper. The mechanism is very similar to the IBM Selectric design introduced decades later, with the only major change being the shape of the striker. Like the Selectric, one could easily change the typeface on a Blickensderfer simply by changing the type cylinder.
The Blickensderfer system dramatically reduced complexity of the design. A typical example contained only 250 parts, compared to the 2,500 parts of a standard typewriter. It was much smaller, lighter, and cheaper than other typewriters. The first known aluminum typewriter (marketed as the Blickensderfer 6 or the "Featherweight Blick") was made by Blickensderfer, as was the first electric typewriter.
Early Blickensderfers were also notable for their keyboard layout. The home row of keys contained the most commonly used letters, DHIATENSOR, allowing the keyboardist to keep their hands on the home row as much as possible, minimizing extraneous hand movement and increasing efficiency. Since the Blickensderfer used the letter wheel, the "scientific" keyboard layout could be used for maximum typing efficiency.
==Models==
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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