Back in 2008, the product development branch of the Perkins School for the Blind did a redesign of the Perkins Brailler. The Brailler is a braille typewriter that was originally invented by a group of teachers at Perkins in 1951. This Next Generation Brailler was the first major redesign of the machine in over 50 years.
The original Brailler
Instead of the usual 40+ keys found on a typical typewriter, the Brailler only includes six dot keys (one for each dot in the Braille alphabet), a space key, a backspace key, a line key, and an erase key (the newest addition). The paper feed is specially designed so as not to crush the raised dots in the paper. For a complete history of Braillers, see here.
Refreshable Braille display