The Newmanry History
Part of the General Report on Tunny (1945)
Codes and Ciphers
56C Page 367
56 - COPYING MACHINES
56A Hand Perforator.
56C Insert Machine.
56G Miles B C D.
56H Miles A.
56J Tunny and Decoding Machines
56L Decoding Machines
For general description and classification see Chapter 13.
56A. HAND PERFORATOR.
Operation of the keyboard produces punched tape.
This simply copies tapes. It consists of a tape-reader linked to a
reperforator. To make corrections by hand, it is necessary to stop the machine,
and replace the input tape by one bearing the letter to be inserted.
56C. INSERT MACHINE.
(Vulgarly known as the IBM machine)
Functionally this is an Angel with a device for making corrections by hand
easily. In addition to the reader and reperforator it has a punch insertion
typewriter to which nine special keys have been added, thus
For normal running use "read" : "start" means start and continue to run;
"step" means step one letter.
To insert letters, "stop" and
for A to Z use the ordinary keyboard;
for 9 use the space bar;
for 3458/ use the special keys.
To step the reader but not the reperforator use "non-read".
To step the reperforator but not the reader use special key "/";
To correct a letter, use "non-read", and insert.