Sorting Detail Cards - IBM 80 Customer Engineering Manual

CARD MATCHING DEVICE
57
the advent of a detail card which again causes sorting
into the 9 pocket. Thus, it can be seen that if two
master cards occur in direct succession, the first master
card will follow its group of detail cards into the 9
pocket while the second master card will be rejected.
As long as each master card is preceded by one or more
detail cards, both the detail cards and their master
card will sort into the 9 pocket.
If it is desired to match a group of detail cards with
more than one master card, the master card identifica-
tion must occur only in the last master card of each
group. If the identifying punch or corner cut were
to
occur in all master cards, the first master card of each
group would tollow its detail cards into the 9 pocket
but the latter master cards of the group would be re-
jected.
Cards which have no punching or no corner cut
which can be read by either the card brush or the rail
brush will SOrt into the same pocket as the preceding
card. If such a card is the first card fed into the machine,
it will reject.
Those cards having a corner cut or significant punch-
ing which is read by the card brush will reject, unless
they are preceded by a detail card.
The arrangement of the cards as well as the identify-
iRg punching or corner cuts in the cards is a factor
that governs matching. However, it should be remem-
bered that matching with this device should be done
only with a master deck that is known to be complete.
CIRCUIT DESCRIPTION
THE
FOLLOWING
circuit description for card matching
covers the operation of a Type 82 Sorter with a card
matching device. The circuits described refer to wiring
diagram 270094. A reproduction of this wiring dia-
gram is shown in Figure 41.
An additional relay chassis, which accommodates
the circuit components necessary for card matching,
is
mounted on the inner side of the main relay gate at
the top (Figure 42). The two card matching switches
are located directly below the start and stop keys in a
special recess in the right upper front cover assembly.
A commutator is mounted on the card feed crank-
shaft and is timed to make at 9 time and break after
12 time of each card cycle. This commutator consists
of a split cam which can be setscrewed to the shaft
without removing any basic machine parts. A pair of
brushes, mounted in a holder which is attached to the
Figure 42. Card Matching Tube Chassis
right end frame assembly, ride on the surface of the
cam and are electrically connected once each card
cycle when the metal section of the cam passes under
the brushes.
As previously stated, the rail brush is timed to make
at the same time as the card brush. By means of the
thumb screw on the rail brush assembly (Figure 40),
the rail brush may be positioned properly for track-
ing.
Sorting Detail Cards (Figure 41)
When the corner cut or 12 or 9 punching in the
first detail card of a group is sensed by the rail brush
at 9 time, a circuit is completed as follows to apply
+150 volts to the starting anode of the OA4G trigger
tube: from the plus
DC
circuit terminal 13, to the
TD-A point, through contact roll cover switch
1,
card
lever contact 1, to
R-1,
through the outer selector com-
mutator brush, the inner commutator brush on the 9
spot, the contact roll common brush, contact roll, the
hole in the card (or corner cut), rail brush, card match-
ing switch
ION,
octal plug terminal 5, 47,000 ohm
resistor, to the starting anode of the OA4G trigger
tube. Applying this voltage to the starting anode
causes the OA4G trigger tube to fire, thus removing the
grid
bias from the 25L6 power tubes and energizing