FUNCTIONAL
PRINCIPLES
7
During the time that the punching in the card
is
sensed and the proper chute blade combinations are
set up, the card
is
continually moving from right
to
left under control of the constantly running feed rolls.
Speed
and
Capacity
The speed of the Type 82 machine
is
650 to 660
cards per minute.
The
capacity of the card magazine
is
550 cards.
PRINCIPLE
OF
SORTING
Numerical Sorting
Sorting multiple digit fields when only one column
may
be
sorted
at
a time is illustrated in Figure
2.
A
group of cards, punched
11
through 23 in a two digit
field, are arranged in miscellaneous order and placed
in the card magazine of the sorter.
The
units position
is
sorted first by positioning the card brush
on
that
column and running the cards through the machine.
All cards punched with a 1 in the units column will fall
into the 1 pocket, all cards punched with a 2 in the
units column will fall into the 2 pocket, etc.
When
all the cards have been run through the
machine for sorting on the units position, the card
brush
is
shifted to the tens column position and the
cards removed from the pockets. To remove cards from
the pockets in proper sequence, the
l's
are removed
first and placed
face
down in the card magazine, the
2's are removed next and placed face down on the
l's, the 3's
face
down on the 2's, etc. This
is
common
practice but cards may be removed in descending order
by
starting with the 9's and keeping the cards face up
in the palm of the hand instead of face down. The
important item during removal
is
to keep the cards
in sequence.
After all cards have been removed from the pockets
and replaced in the card magazine, and the card brush
has been located on the tens column position, the
machine
is
restarted and sorting of the tens position
takes place. Those cards punched with a 1 in the tens
position fall into the 1 pocket, the 2's into the 2 pocket,
etc.
By
removing the cards from the pockets in ascend-
ing order
as
was
done on the first sort,
(l's
ahead of
the 2's) the original group of miscellaneous cards will
be
found to be in numerical sequence froni
11
to 23.
The sorting process could be illustrated further
by
the
use
of a larger field, but from the foregoing example
it will
be
observed that, upon completion of the second
sort, all cards will appear in groups arranged in correct
numerical sequence.
The procedure for sorting cards to arrange them in
proper sequence according to major and minor classi-
fications follows the same general principle.
If
the above
mentioned two-digit numbers were subclassifications and
another one-column field were a major classification,
the next sort for major classification would bring these
groups together, and the subclassifications would be
in order within each group
as
illustrated in Figure 3.
A general rule to be kept in mind
is
that the sorts
for the minor
or
subclassifications are made first and
the
SOrts
for the major classifications are made last.
Alphabetic Sorting
Sorting cards containing alphabetic information into
alphabetic sequence necessitates the double sorting of
each column, since each letter
is
recorded by two holes
in a single column, one of which
is
12,
11
or 0 and
the other a digit from 1 to
9.
For example, the letter
A
is
indicated
by
punched holes in the 12 and 1 posi-
tions of a given column.
1523
522
1323
522
422 322
521
421
321
513
412
313
512
411
312
"5"
Pocket
"4"
Pocket
"3"
Pocket
Major! Sub
3)
! 2
3
5
12
3
1
5
12
2
4
12
2
3
12
2
1
12
2
4
'2
1
1
'2
,
1
3
12
1
: 1
3
i 1
3
: 1
2
: 1 2
,
, 1
2
4Y:
1
1
Cards
in
Maga
zine
by (cards
in
order
sub
classificatio
n
ne~us
but
in
miscella
order
by
major
classification)
Cards now
in
order
by sub
and
major classification
SORTING
BY
MAJOR
GROUPS
Figure
3.
Principie
of
Sorting
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