Step ("run" on Miles D) causes both the transmitters and reperforators to
start and continue to step.
Space causes the reperforators to step, and punch blanks, the transmitters
Single step, single space can, be flicked on and off for single step or
The unlabelled switch to the right of the reperforator switches on Miles C
controls an improvised gadget used for making motor tapes when Tunny was disabled
by the Fire (See Glossary).
The pair or switches below these on Miles D are for flagging (Next para.
The Triple switch is the on-off switch.
(m) Mechanised Flag Gadget (Miles D only).
The basic idea is to control the stepping of transmitters automatically by
means of impulses from the tapes themselves.
This may be needed if tapes are to be combined not concurrently, but
consecutively, in a large number of stretches.
The gadget was made specially for Mechanical Flagging (ch 95) without much
regard to flexibility. Nevertheless, though designed for ordinary flags it proved
suitable for combined key flags, when it is used quite differently.
This explains the rather odd facilities available.
The gadget manifests itself as a series of jacks JZ1 - JZ8.
A cross in :
JZ1,2,3,4 starts transmitters 1,2,3,4, respectively.
JZ5 produces a cross in JZ7 and, if
JZ1,2,3,4 are all dots, produces a cross in JZ8 & steps transmitter 4
JZ6 stops transmitters 1,2,3,4 and steps transmitter 5one sprocket hole.
The gadget has two switches : the right hand one switches in the gadgets,
the left hand one then acts as an on-off switch.
56H. MILES A.
(a) Layout (see photograph Fig 58(xxix)).
3 Controls (which control the stepping of both transmitters and
6 Common jacks.
8 Sets of jacks for differencing an impulse (backwards) or taking an impulse