
Aveling Barford. John Parsons said: ” It was a very early numerically controlled drilling machine made by David Brown. It was controlled by a punched paper tape. In the Planning Office we calculated the hole co-ordinates using log tables (no calculators then!) and wrote them onto punch cards which were then sent to the punch room where they were punched and the tape made from the cards. If the punchings weren’t clean then the machine would not read them. Also the paper was quite fragile & broke easily.” Operator is Peter Lee