IBM 80 User Manual

18
CARD SORTING MACHINE, TYPE 82
reverse lock is in the form of a ratchet knurl cut on the
rim of the drive pulley. A locking pawl operates against
the pulley when the force of motion
is in a clockwise
direction (viewed from the pulley
end), thus preventing
any actual rotation of the pulley.
When the direction of
rotation
is counterclockwise (viewed from the pulley
end), the locking pawl is held away from the knurled
edge through the action of the pawl operating arm.
The pawl operating arm
is actuated by a friction contact
with the drive pulley. The knurled teeth on the rim
of
the pulley are fine enough to prevent any appre-
ciable motion when the reverse lock operates. Any older
Type
80 machines which are not equipped with the
declutching type of handwheel should have a reverse
lock mechanism.
Feed Knives (Figures 16, 17, 17A)
The feed knives, in conjunction with the roller
throat assembly, are designed to feed one card at a
time from the card magazine. The roller throat
assem-
bly consists of a vertical knife whose lower edge is
set parallel to a cylindrical steel roller. The throat
assembly
is adjusted to allow the passage of only one
card at a time through an opening between the knife
. edge and the roller. The roller assembly
is equipped
with small oil wicks for continuous lubrication.
Power to operate the
feed knives is obtained from
the main drive shaft through the card
feed worm gear
Figure 16. Card Magazine
Figure 17A. Feed Knife Drive
located near the handwheel (Figure 13). This large
gear drives a crank shaft which,
by means of a con-
necting link, transforms the rotary motion of the
crankshaft to reciprocating motion of two feed levers.
One feed knife slide assembly is engaged with each
feed lever and, as the feed levers reciprocate, the feed
knife slide assemblies travel back and forth in porous
bronze guides. Their speed of travel
is 1300 strokes
per minute, thus enabling them to feed
650 cards
per minute, one with each stroke to the left.
The component parts of
a feed knife slide assem-
bly are shown in Figure 18. The knife holder is
adjustable laterally in relation to the feed knife slide
and the
feed knife is adjustable vertically' for the
proper projection. (Carbolloy
feed knives are not ad-
justable.) The knife slide pin furnishes the means of
engagement with the feed levers. The knife slide pins
are available in two
sizes; a standard size and an over-
SIze to compensate for wear.
Since there is no latching point in the drive of a
sorter, the
feed knives may come to rest at any stage
of their
feed or return stroke when the machine is
stopped. Upon starting of the machine, however,
that
feed knife stroke which was interrupted will be
completed and, as the feed knives make their first
full length stroke to the left, one card will be picked
up from the bottom of the pack in the card maga-
zine. This card is fed through the roller throat and
between the first set of
feed rolls by the movement
of the feed knives to the left (Figure
17). As soon
as the card is ·firmly gripped between the first set
of
feed rolls, the feed knives start their return stroke

IBM 80 Specifications

General

Brand	IBM
Model	80
Category	Office Equipment
Language	English