telegraphoscope

1 definition found

telegraphoscope - Collaborative International Dictionary of English v.0.48 :

  Telegraphoscope \Tel`e*graph"o*scope\, n. [Gr. th^le far +
     -graph + -scope.]
     An instrument for telegraphically transmitting a picture and
     reproducing its image as a positive or negative. The
     transmitter includes a camera obscura and a row of minute
     selenium cells. The receiver includes an oscillograph, relay,
     equilibrator, and an induction coil the sparks from which
     perforate a paper with tiny holes that form the image. It is
     now (1999) obsolete, having been replaced by telefax and
     internet transmission of images.
     [Webster 1913 Suppl. +PJC]