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Improvement of One Hand Input of Six-Dot Braille

IP.com Disclosure Number: IPCOM000107606D
Original Publication Date: 1992-Mar-01
Included in the Prior Art Database: 2005-Mar-22
Document File: 2 page(s) / 84K

Publishing Venue

IBM

Related People

Wakita, O: AUTHOR

Abstract

Described is a method for typing six-dot-braille characters by using five fingers of one hand. A braille cell is composed of one to six dots arranged in two columns of three dots, numbered in the way shown below in Fig. 1. 1 o o 4 o - o - o o o - 2 o o 5 - - o - - - - o 3 o o 6 - - - - - - o o A B C Z Fig. 1. Arrangement of dots in a braille cell. It may denote a letter, a punctuation sign or mark, or a special character.

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Improvement of One Hand Input of Six-Dot Braille

       Described is a method for typing six-dot-braille
characters by using five fingers of one hand.  A braille cell is
composed of one to six dots arranged in two columns of three dots,
numbered in the way shown below in Fig. 1.
   1 o o 4       o -     o -     o o     o -
   2 o o 5       - -     o -     - -     - o
   3 o o 6       - -     - -     - -     o o
                  A       B       C       Z
   Fig. 1. Arrangement of dots in a braille cell.
It may denote a letter, a punctuation sign or mark, or a special
character.

      Usually, braille characters are written by using a braille
typewriter which has six keys for the respective dots and one space
key.  Pressing key 1 makes the braille character for 'A'.  The
character for 'B' is written by pressing keys 1 and 2 simultaneously,
'C' is written by pressing keys 1 and 4, and 'Z' by pressing keys 1,
3, 5 and 6.  Keys 1, 2 and 3 are pressed with the left hand,
and 4, 5, and 6 are with the right hand.  Keys are arranged in a
line, as follows:
      (3)(2)(1)     (4)(5)(6)
A standard braille typewriter cannot be operated with only one hand.

      If, however, one additional key is provided for writing dots 2
and 3, and the 7 keys are placed as below in Fig. 2, any braille
characters can be typed with just one hand.
             (1)(4)(5)(6)
          (2)                     These three keys are
      (2+3)(3)                    pressed with the thumb.
      Fig. 2.  Improved arrangement of braille input keys.

      The necessity of one-handed typing: A braille reader sometimes
reads a book with one hand and writes braille with another hand at
the same time.  Furthermore, there are some braille transcribers who
can control only one hand.  They write braille characters by using a
braille board, embossing one dot at a time.  It, therefore, requires
a lot of strokes to write something in braille.  A method for writing
each braille character with a single stroke will helps such people.

      Current methods:
      (1) Two-stroke method:  Three keys (keys 1 to 3) for three dots
and a 'null' key are used in this method.  The left half of a braille
character (dots 1 to 3) is written first, then the right half (dots 4
to 6).  If no dots are used in the left or right half of a
braill...