History of the Typewriter
Forfatter: Geo. Carl Mares
År: 1909
Forlag: Guilbert Pitman
Sted: London
Sider: 318
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—224—
writer to find equal distances between the lines, and then
write straight. A fountain pen is recommended for the
purpose.
Progin (1833), to whom we have already made reference,
was next to move, and, as we have seen, his labours were
in a totally different direction. He sought three objects
in his instrument, namely : (1) To print as rapidly as one
could write with an ordinary pen, (2) To make stereotype
plates for use with ordinary printing presses, and, (3) to
copy music or make stereotype plates for the printing of
same.
Bidet, in 1837, produced a peculiar machine which he
termed a Mechanical Typographic Compositor. This in-
strument, although not a typewriter, possessed at least
four of the essentials of a good writing machine, and may
therefore be described at length. It consisted of two posts,
carrying at the upper portion, a wheel, on the periphery
of which were the types. These types, as they revolved
on the wheel, took a supply of ink from two small rollers,
one on either side. Below this wheel was a cylinder, for
carrying the paper. Evidently the cylinder revolved
between each letter, and made a side movement between
the lines. The wheel had to be revolved by hand, until
the required letter was over the printing point, when
pressure upon a lever which bore on the axle of the type-
wheel brought the latter into contact with the paper, and
thus secured the impression. A writing machine, certainly,
but a very slow one.
Dujardin, in 1838, elaborated an instrument which he
termed a “ Tachygraphe.” He made two intruments, one
a small one for recording speeches, and a larger one for
music. Practically, the instrument resembled, in some
respects, a piano, at the end of the keys of which were the
various letters, which all struck to the common printing
point.
The next year, in 1839, M. Perrot produced a “ Machine
Tachygraphique ” having a vertical cylinder and two type-
wheels. The imprint was obtained by means of a wheel
having an escapement hammer or bar striking on a socket.
The keyboard was divided into two parts, one for each hand
and each hand also had its own type-wheel. As soon as
the bar was released, it struck the socket of the wheel, and
printed the letter on the paper. Here, apparently, we
have the origin of the “ automatic impression ” one reads
about occasionally !
Four years then elapsed, when Messrs. Baillet de Sondalo