List of all exhibits. Click on one of them to go to the exhibit page. The topics allow exhibits to be selected by their concept categories. On the right, you can choose the settings of the list view.

The list below shows links between exhibits in a non-standard way. The points denote the exhibits and the connecting lines are connections between them, according to the selected categories.

Enter the end dates in the windows in order to set the period you are interested in on the timeline.

Views: 1936
(Votes: 2)
The average rating is 5.0 stars out of 5.
Print metrics
Print description

The “Picht” machine is a Braille typewriter adapted for the blind, invented by Oskar Picht in 1899. Its production began three years later.
The first single copies of typewriters for the blind had beene created earlier (since the 18th century), but they allowed correspondence only with the sighted. The development of the journal for the blind by Louis Braille in 1825, disseminated in the 2nd half of the 19th century, created new opportunities that were used by the inventor—and later the director ꟷ of the centre for the blind in Bydgoszcz, Oskar Picht.

more

The “Picht” machine is a Braille typewriter adapted for the blind, invented by Oskar Picht in 1899. Its production began three years later.
The first single copies of typewriters for the blind had beene created earlier (since the 18th century), but they allowed correspondence only with the sighted. The development of the journal for the blind by Louis Braille in 1825, disseminated in the 2nd half of the 19th century, created new opportunities that were used by the inventor — and later the director ꟷ of the centre for the blind in Bydgoszcz, Oskar Picht.
The machine constructed by him stamped letters with three-dimensional points on thick paper. However, it did not include all the writing symbols, because this would require a lot more keys. To avoid this, Oskar Picht designed the device so that only one point corresponds to each key. A specific writing mark was created thanks to the configuration of points reflected when pressing different keys; the middle key with the transverse key acted as a spacer (analogous to today's keyboard space).
The writing mechanism was located behind the cart, at the back of the device, focused in its axis of symmetry. The characters were extruded from below by the rod ends of the mechanism; the top the paper was held by an arched, motionless arm, reaching over the roller to the mechanism. The standard, “Pichty” had wooden keys, marked with a plastic pattern. It allowed the identification of the point to which the key was used by touch.
The presented copy does not have these kinds of markings; it used unusual, luxurious keys, with ivory facing.
The mechanism patented by Oskar Picht is still used in manual typewriters for the blind.

Elaborated by the Municipal Engineering Museum, © all rights reserved

 

less

Typewriter “Picht”

Pictures

Links

Game


Recent comments

Add comment: