The Newmanry History

Part of the General Report on Tunny(1945)

Page 359

Tony Sale's
Codes and Ciphers

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54F Page 359

Switches labelled + can be thrown (down only) to add one or more impulses
and equate their sum to a dot.

 Imposes the conditions Q1 + Q2 + Q5 = . Q7 + Q8 = .

(c) Yes Not Switches

On the right half of the switch panel white lines are drawn: conditions
imposed must in effect, pass along these lines.

Switches situated on these lines modify the conditions which pass through
them: of these aa, bb and the bottom switch are three-way switches labelled

( . which means : condition is unchanged (yes)
(
( which means : condition in cancelled
(
{ x which means : condition is reversed (not)

The & + and red switches are described later: at present they are supposed
to be in their normal positions.

(d) & +

Two conditions reach this switch, from aa and bb.

& means both;

+ means both or neither.

It is intended for use with Q + switches

e.g. Q1 + Q2 + Q3 = . , Q8 + Q9 = . , + , means
( either Q1 + Q2 + Q3 = . and Q8 + Q9 = .
(
( or Q1 + Q2 + Q3 = x and Q8 + Q9 = x

i.e. Q1 + Q2 + Q3 + Q8 + Q9 = .

Obviously any number of Q's can be added.

54F MISCELLANEOUS COUNTER FACILITIES

(a) split score Counter

If the red switch to the right of & + is thrown the score

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