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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