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)
“The truth in a calm world,
In which there is no other meaning, itself
Is calm, itself is summer and night, itself
Is the reader leaning late and reading there.”
—Wallace Stevens (1879–1955)