Tape Reading
The tapes were read photo-electrically at a "gate" which was placed as near as possible to the sprocket to reduce the effect of stretched tapes. Successive characters on the tape were read by a battery of ten photocells, an eleventh for the sprocket holes and two additional ones for the "stop" and "start" signals that were hand-punched between the third and fourth and fourth and fifth channels.
Read more about this topic: Heath Robinson (codebreaking Machine)
Famous quotes containing the words tape and/or reading:
“We shall see but little way if we require to understand what we see. How few things can a man measure with the tape of his understanding! How many greater things might he be seeing in the meanwhile!”
—Henry David Thoreau (1817–1862)
“There are women in middle life, whose days are crowded with practical duties, physical strain, and moral responsibility ... they fail to see that some use of the mind, in solid reading or in study, would refresh them by its contrast with carking cares, and would prepare interest and pleasure for their later years. Such women often sink into depression, as their cares fall away from them, and many even become insane. They are mentally starved to death.”
—Ellen Henrietta Swallow Richards (1842–1911)