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FUNCTIONAL
PRINCIPLES
.,
pletes a circuit to the filaments of the tubes. It also
completes a circuit to the time delay relay.
The start button, when depressed, sets up circuits
which energize the drive motor, and it causes the ma-
chine to operate. The start button is ineffective for
approximately 50 seconds after turning on the main
line switch because of the delay caused by the time delay
relay. This delay is necessary to allow the electron tube
filaments to reach proper operating temperature before
the machine is started.
The stop button causes immediate stopping of the
machine. When the stOP button is depressed, the run-
out feature of the machine is rendered inoperative, and
the machine stops as soon as its inertia is overcome by
friction.
The fuses are located on the inner side of the right
hand lower cabinet assembly in the position shown in
Figure 1.
Card Brush
The card brush senses the punching in the card. It
may be set on any column to be sorted by rotating the
card brush lifting handle near the front of the card
magazine. Each rotation of the handle moves the brush
one column. The brush may be moved across several
columns by rotating the handle to the upper position
and sliding the brush holder to the desired column while
pressing down the finger lever at the top of the brush
assembly. A column indicator guide and pointer is
located above the brush in a position readily visible
to the operator for convenient setting of the brush on
the column to be sorted.
Contact Roll Cover
The plastic cover. over the contact roll must be down
before the start key can become operative. This is a
safety cover which operates two microswitches. Open-
ing of these microswitches when the contact roll cover.
is raised interrupts the running and sorting circuits.
Commutator
On the front end of the first lower feed roll is a
commutator on which 12 contact bars (one for each
vertical position in the card) and an alphabetic zone
bar are mounted. The contact bars on the commutator
are accessible through the large hole in the switch plate.
When all of the commutator contact bars are toward
the outside of the commutator, all holes punched in
the card column being sorted are sensed and cause the
card to sort to its proper pocket. However, if the 4 and
o
contact bars, for example, were moved to the center
of the commutator, sorting of 4's and O's would be
suspended. Any 4 or 0 punching in the card column
being sorted would not be sensed and the card would
feed to the reject pocket just as though it were un-
punched. Sorting of all other digits would be normal.
1£
the zone contact bar (red bar) is moved to the
center of the commutator, sorting will be suspended
for all punching except 0, 11 and 12. That is, those
cards that have no 0, 11 or 12 punching in the column
being sorted, will be fed to the reject pocket as though
they were unpunched.
Declutching Hand Wheel
A declutching hand wheel is provided for turning
the machine over by hand to check adjustments and
timings. This hand wheel is located on the right end
of the machine and, when rotated in a clockwise direc-
tion, causes the main drive shaft and its gears to revolve.
The handwheel must be pressed to the left while it
is being revolved before the main worm shaft will
rotate. When the machine is operating under power,
the handwheel is automatically declutched to keep
it from revolving and presenting a hazard.
Card Runout
When the card magazine becomes empty while the
machine is in operation, a runout feature incorporated
in the machine keeps the drive motor running for a
long enough period of time to allow all cards to feed
to their proper pockets. On older sorting machines this
runout feature was not present, making it necessary in
many cases to depress the start key long enough to feed
the last few cards into their proper pockets.
Pocket Stop Device
Each pocket of the sorter is equipped with an auto-
matic pocket stop. This is a safety device which auto-
matically shuts off the current and stops the machine
when anyone of the thirteen pockets becomes filled to
capacity with cards. Each pocket has a capacity of
approximately 550 cards. Once the machine has been
stopped by the activation of the pocket stop device, it
can not be restarted by means of the start key until
the full pocket or pockets have been emptied.
Machine Operation
The main line switch should be turned on first to
allow time for the tubes to heat up while other prepara-
tions for starting are being completed.
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