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I
I
l.
Positive
and negative
turns
The number
of
mrns
made
is
shown
in
the
multiplier
register.
Tl-is
has a
turn
direction
indicator which
shows
red
for
negative coupling.
Positive
or
negative
coupling
is
determined
as
soon
as
the crank
has
been
turned about
half
an inch
in
the positive
or
negative
direction,
irrespective
of
urhether
the
turn
is completed
in
this
initial
direction
o,
,l.rr.d
and complered
in
the opposite direction.
A
turn that
has
bem initiated
more
rhrr,
,o
inch
must
be
completed.
Negative coupling
is discontinued when the register is
cleared
with
the clearing lever.
The multiplier
mechanism
counts
the number
of
positive twrns when
the
first
and following rurns are positive.
It
counts
the number of
negs.tioe
turns
when
the
first
and
following turns
are negative.
If
positizte
tarnt
dre
rnad,e
witb
a negatirte coapled
regitter,
it
counts
backw.rds, that is ro say,
it
akes
off
one
for
each
turn.
If
a
start
is made
with
noughts alone,
or
the zero
line is
passed
during
calcula-
tion, the
complement
of
the last number
registered
in
the
multiplier
r.girt.,
is
obtained
automatically. (Complement
of 1:999999999.)
The
turn
direction
indicator
on
the
muitipli"r
register
-showing.
that
the
machine
is
ready
lor
negattve
opera-
tion.
The position indicator
The red position indicators
in
the
multiplier
and
product
registers
are
co.rtrollei by the red
shift
and tabulator keys and thus
indicate
in
which column position the
machine operates
at
the
moment'
Product
register
I
lo
Multiplier
register
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