The Collaborative International Dictionary
Noctograph \Noc"to*graph\, n. [L. nox, noctis, night + -graph.]
A kind of writing frame for the blind.
An instrument or register which records the presence of watchmen on their beats.
--Knight.
Wiktionary
n. a form of stylus that helps a blind person to write
Wikipedia
A noctograph is a writing instrument composed of a piece of paper whose underside is treated with printer's ink carbon paper and a metal board with clips to hold the paper in place and guidelines to make for straight writing in the dark. The user writes with a metal stylus. The original purpose was to allow the blind or partially sighted to write with more ease than with a traditional pen, although it has also been used by the fully sighted to write in the dark. It was originally patented by Ralph Wedgwood in 1806.
Usage examples of "noctograph".
A few years later, meanwhile having shown great legal promise, Prescott was bent over a special writing-frame made for the blind and near-blind, the so-called noctograph, invented by a certain Wedgewood.