Evening Republican, Volume 20, Number 197, Rensselaer, Jasper County, 17 August 1916 — An All-Seeing Eye. [ARTICLE]

An All-Seeing Eye.

A self-operating eye, which when attached to a typewriter enables that machine to copy any printed matter properly set before it, is the invention of a Brooklyn electrical engineer. The eye consists of a large sphere having a lens on its front side and a field corresponding to a retina on which are situated a large number of selenium cells connected with a source of electric current. The eye Is mounted on and moves with the carriage of the typewriter, and is so focused that the image of but one letter is reflected in it at a time. Popular Mechanics Magazine tells how the machine operates.