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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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