s
Fig. 10 Bottom view of the Pfoff 463
R
8606
The
gear
cose cover and the foom
rubber
sheet
are
removed.
The lower drive shaft carries the feed driving eccentric and the hook shaH driving gear in the
gear
case, ond the mechanical opener driving mechanism and the feed lifting eccentric near its
left
end.
The hook shofi carries centrifugal switch F whose stud pushes the valve s'em to the right and
opens hook lubrication shut-off valve V. The same valve prevents the oil from seeping out when
the
machine
is
inoperative.
The stitch length setting is transmitted from the stitch length control to
shaft
L, a
crank
mechanism
in the
gear
case,
the feed rock
shaft,
and an
adjustable
crank which, in turn, transmits it to the
feed
bar.
Upon
special
request, the machine can be fitted with o stitch length limitoting device for back
ward
sewing. To limit the length of the reverse stitch, turn in
grub
screw S of crank R on shofI L.
15
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