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3 votes

How did mechanical punched tape readers work?

Back in 1974, 50 years ago, my high school had a couple of Model 33 teletypes (teleprinters) connected to a DEC PDP 11/70 computer. The paper tape readers they had were mechanical ones which fingers, ...
Fred's user avatar
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2 votes

How did mechanical punched tape readers work?

The original punchcard mechanism as used on looms they pushed a set of rods through the card. A weak enough spring will allow the rod to push against the card without damaging it. And then a simple ...
ratchet freak's user avatar
1 vote

How did mechanical punched tape readers work?

The punched tape readers collected the data by shining a light through the holes with sensors to record the patterns. You can get an overview here: https://gcodetutor.com/fanuc-training-course/punch-...
Solar Mike's user avatar
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