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the segment support. A pin is inserted between the toggle
brackets and the segment support, so the brackets may be pivot-
ed into position by their mounting screws. Toggle links are
,pinned to the rear of the toggle brackets and extend down to
studs on the front of two shift toggle plates.
The left shift toggle lever plate is pressed on a shaft that passes
through bearing holes in the power frame casting'. The right
plate is pinned to the shaft. When the toggle plates andshalit
are rotated, the segment support is moved up or down by the
toggle links.
Two heavy hairpin springs are mounted to studs
on the toggle plates and studs on the side frames. The toggle
springs hold the basket mechanism in either the fully raised or
lowered position. They also aid the basket in its movement.
The right toggle lever plate has upper and .lower pins
ext~nding
to the right in the: machine.
The shift actuating and buffing mechanism supplies motion and
force to the pins on the right toggle lever plate, causing it to
rotate. This action causes the basket assembly to be raised or
lowered.
The shift mechanism incorporates two key levers. The left
shift key lever fulcrums in the key lever bearing support and
contains the shift lock. The right key lever pivots in the key
lever bearing support and extends toward the rear of the
ma-
chine. The underside of both key levers have hooks that en-
gage an equalizing shaft which pivots between,the left and
right side frame. The shaft causes both key levers to be de-
pressed when one is actuated. The right key lever has a hole
in front of its pivot point that receives the clevis of the cam
release link. The cam release link haoks into ,the shift cam
re lease lever.
The shift cam is a double lobe double action cam. Double
action means the cam will be released and rotate over one lobe
when the keylever is depressed. When the key lever is released,
the cam will be released again and rotate over the second lobe.
Later machines include a spring between the shift cam and key
lever. This spring reduces the possibility of the shift cam re-
peating.
The bock end of the right key lever has a hole that receives
the clevis from the shift pusher link. The shift pusher and the
buffer are shoulder riveted to the shift actuating lever. This
is called the shift pusher lever assembly. The actuating lever
pivots on a shoulder screw in the power frame and is spring
loaded to the rear. A shift operating link extends from the cam
frame to the actuating lever. The buffer has two studs: one is
located so that it passes through a cut out in the shift
toggle
levers plate, the other stud is on the forward end of the buffer
and passes through a window in the retaining plate.
The retaining plate is held to the power frame by two screws
and it
holds the pusher and buffer assembly in toward the tog-
g Ie lever 'Plate. The window in the retain ing plate lim its the
upper and lower positions of the buffer. The retaining plate
has two formed lugs that extend toward the center of the ma.,.
chine. The lugs limit the upper and lower positions of the
pusher. An auxiliary hairpin spring hooks on
0:
lug on the re-
taining plate and on the forward stud on the huf.fer. It aids in
positioning and holding the buffer.
22
Camotrest
-"'_~_
Buffer restricting
lower pin
Com on receding s.urface
Figure 45. Pusher and Buffer Operation
(Operation)
The depression of either shift key button cailses both key levers
to depress since they are connected by an equalizing rod (Fig.
44). Depression of the front end of the right key lever raises
the rear end. This raises the shift pusher, by means of the
pusher link, until the upper arm of the pusher is directly
be-
hind the upper pin on the shift toggle lever plate (Fig_ 45).
The cam release link has been lowered enough by this action
to rotate the lug on the cam release lever out of the path of
the outer lug on the shift cam, and into the path of the inner
cam lug (Fig. 46). The cam is rotated into the power roll by
the spring arm, and held aga'inst the power roll by the spring
on the actuating lever. As the cam rotates from 0°
to
90°,
it pulls the operating link forward. The operating link rotates
the actuating lever about its mounting screw and this brings
the pusher ond buffer forward. The upper arm of the pusher
contacts the upper pin a.nd moves it forward. This causes the
shift toggle lever to rotate counterclockwise against the
tension of
the two t09g1e springs. Rotation of the right toggle
lever plate causes both toggle links, the segment support,
segment and type to start the ir downward motion. The· four
segment guides flex to allow this movement. Curing this o:ction
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