The Perkins Brailler is a "braille typewriter" with a key corresponding to each of the six dots of the

braille Braille (Pronounced: ) is a tactile writing system used by people who are visually impaired, including people who are blind, deafblind or who have low vision. It can be read either on embossed paper or by using refreshable braille displ ...

code, a space key, a backspace key, and a line space key. Like a manual

typewriter A typewriter is a mechanical or electromechanical machine for typing characters. Typically, a typewriter has an array of keys, and each one causes a different single character to be produced on paper by striking an inked ribbon selectivel ...

, it has two side knobs to advance paper through the machine and a carriage return lever above the keys. The rollers that hold and advance the paper have grooves designed to avoid crushing the raised dots the brailler creates. Although braille notation was designed for people who are blind or

visually impaired Visual impairment, also known as vision impairment, is a medical definition primarily measured based on an individual's better eye visual acuity; in the absence of treatment such as correctable eyewear, assistive devices, and medical treatment� ...

to read, prior to the introduction of the Perkins Brailler, writing braille was a cumbersome process. Braille writers created braille characters with a stylus and slate (as developed by

Louis Braille Louis Braille (; ; 4 January 1809 – 6 January 1852) was a French educator and the inventor of a reading and writing system, named braille after him, intended for use by visually impaired people. His system is used worldwide and remains virtu ...

) or by using one of the complex, expensive, and fragile braille writing machines available at the time.

History

The first Braille writer machine was presented by

Frank Haven Hall Frank Haven Hall (February 9, 1841 – January 3, 1911) was an American inventor and essayist who is credited with inventing the Hall braille writer and the stereographer machine. He also invented the first successful mechanical point writer and ...

in 1892. The original Perkins Brailler was produced in 1951 by David Abraham (1896–1978), a woodworking teacher at the Perkins School for the Blind that was dissatisfied with problems of the existing technology. The director of the Perkins School for the Blind, Gabriel Farrell, asked Abraham to create an inexpensive and reliable machine to allow students to more easily write braille. Farrell and Abraham worked with Edward Waterhouse, who was a math teacher at Perkins, to create the design for the Brailler. In 2008, a lighter and quieter version was developed and launched. It also includes an erase key and an integrated carrying handle. The new model won the Silver Award in the 2009 International Design Excellence Awards. The paper placement is achieved by rolling the paper onto an internal drum, unrolling it when the user presses a line-feed key, and using a clock-like escapement to move an embossing carriage over the paper. A system of six cams consisting of rods with a square cross-section transfers keystrokes to the wire-like styli contained in the carriage. Tolerances are close, and the buildup of oily dirt with normal use necessitates periodic cleaning and adjustment.

SMART Brailler

A new version of the Perkins Brailler, the SMART Brailler, was invented by David S. Morgan and released in 2011. The SMART Brailler is based on the mechanical action of the classic Perkins Brailler, and, when unpowered, is operable as a standard Brailler. The SMART Brailler includes sensors capturing the mechanical motion of the embosser, and, when powered, adds text-to-speech audio feedback and a digital display for use by both sighted and blind individuals. Software for the SMART Brailler includes multi-lingual speech and Braille support, including English, UK English, Arabic, French, German, Italian, Portuguese, Polish, Russian, and Turkish.

Embossers

With the advent of computers, many users create braille output using a computer and a braille embosser connected to the computer. Visually impaired users can read the computer screen by using

screen reader A screen reader is a form of assistive technology (AT) that renders text and image content as speech or braille output. Screen readers are essential to people who are blind, and are useful to people who are visually impaired, illiterate, or ...

computer software and/or

braille display A refreshable braille display or braille terminal is an electro-mechanical device for displaying braille characters, usually by means of round-tipped pins raised through holes in a flat surface. Visually impaired computer users who cannot use a s ...

s. Users of such a system can use a computer keyboard in the standard way for typing or can use a special keyboard driver that allows the six keys ''sdf-jkl'' to be used as a braille entry device similar to the Perkins Brailler.

Braille notetakers

Many visually impaired users use electronic portable note-taking devices that allow keyboard entry in braille using the 6-key layout of the Perkins Brailler and output in synthesized speech and/or a one or two-line

refreshable braille display A refreshable braille display or braille terminal is an electro-mechanical device for displaying braille characters, usually by means of round-tipped pins raised through holes in a flat surface. Visually impaired computer users who cannot use a s ...

consisting of tiny pins made of metal and plastic. Notetakers include PDA features such as an address book and calculator. Because of the many moving parts and the accessibility of the refreshable braille displays to the environment, notetakers are typically quite expensive. They are easily damaged and must be returned to their country of origin for periodic cleaning.

References

External links