Giuseppe Ravizza

→　"Writing Ball"

プリンタの発達史～1984年 - マルチメディア／インターネット事典

Giuseppe Ravizza

代筆チェンバロ
Cembalo scrivano
"Cembalo scrivano o macchina da scrivere a tasti."
"Cembalo scrivano"

hans r malling j hansen type writing machine

United States Patent 125,952
Issue Date: April 23, 1872

Current U.S. Class: 400/112 ; 400/393; 400/420; 400/486
hans r malling j hansen type writing machine
hans r malling j hansen type writing machine Utterly Useless Information

No one person can be said to have invented the typewriter (seen in the episodes “Monkees On The Line” and "Everywhere A Sheik, Sheik"). A number of people contributed insights and inventions which eventually resulted in commercially successful instruments. Early developers of type writing machines include Henry Mill, Pellegrino Turri (who also invented carbon paper). Many of these earliest machines, including Turri's, were developed to allow the blind to write. In 1829, William Austin Burt patented a machine called the "Typographer". Like many of these other early machines, it is sometimes listed as the "first typewriter”. The first true typewriter as it is in use today was invented in 1864 by Austrian Peter Mitterhofer, but was never produced commercially. Rev. Malling Hansen of Denmark produced the Hansen Wititng Ball which went into commercial production in 1870 and was the first commercially sold typewriter. Hansen used a solenoid escapement to return the carriage on some of his models and was responsible for the first "electric" typewriter. The ability to view what is typed as it is typed is taken for granted today. In all early keyboard typewriters, however, the typebars struck upwards against the bottom of the platen. Thus, what was typed was not visible until the typing of subsequent lines caused it to scroll into view. The QWERTY layout is thought by some to be an inefficient one, since it requires a typist by touch to move his or her fingers between rows to type the most common letters. A popular story suggests that it was used for early typewriters because it was inefficient, so as to prevent the typewriter's typebars from wedging together or possibly to slow down a typist so as to reduce the frequency of the typewriter jamming. Interestingly, the word "typewriter" is one of the longest single English words that can be typed on a single row (namely the top row) of a QWERTY keyboard. One plausible story behind the unusual layout is that it was designed so that the salesmen could quickly type the word “typewriter”, thereby impressing their prospective customers. It seems unlikely however, that the engineers would have designed the keyboard layout around a simple sales gimmick.

"Writing Ball"

gallaher type wheels printing telegraphs

gallaher type wheels printing telegraphs
United States Patent 116,175
Issue Date: June 20, 1871

Current U.S. Class: 178/39 ; 400/466

Benjamin livermore hand printing device

United States Patent 39,296
Issue Date: July 21, 1863

Current U.S. Class: 400/124.3 ; 178/30; 400/88

livermore hand printing device
Benjamin livermore hand printing device

Search in US Patent Collection db for:CCL/400/$

Searching US Patent Collection...
Results of Search in US Patent Collection db for:
CCL/400/$: 29856 patents.
Hits 29851 through 29856 out of 29856