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:
“I could buy one
Tape and get another free. I accept- Ed the deal, paid for one tape and
Chose a free one. But since I’ve been
Repeatedly billed for my free tape.”
—John Ashbery (b. 1927)
“Even the poor student studies and is taught only political economy, while that economy of living which is synonymous with philosophy is not even sincerely professed in our colleges. The consequence is, that while he is reading Adam Smith, Ricardo, and Say, he runs his father in debt irretrievably.”
—Henry David Thoreau (1817–1862)