Fig.
51
Pfaff
-261
automatic embroidery mechanism.
Dial
C controls
the
seHing of engaging levers
d,,
dt
and
dt
Which
engaging
lever,
or
levers,
is
to
be
applied
in
conveying the throw
of
the
pattern
cam to the zigzag mechanism
is
determined
by
the position
of
the
cam
stud
(50418)
which carries
engaging
lever dial
C.
This dial
can
be
turned
to
six
positions. When set
on
zero (see Fig. 52), all three
engaging
levers
are
raised
against
the pressure exerted
by
the spring assembly
arranged
above.
With all
three
engaging
levers raised, the controls
of
the Pfaff Automatic
can
be
set
like those
of
any
ordinary
zigzag sewing machine.
When
dial C
is
set
at
any
other
position,
one
or
two
engaging
levers
are
en-
gaged
and
transmit the motion
of
the
engaging
lever driver
to
the zigzag
mechanism. The
engaged
lever falls into the slot
of
the stud underneath so
that
the transverse pin
in
this slot
enters
its notch.
When
set
at
any
position
between
1
and
5, respectively,
dial
C effects the fol-
lowing settings
in
the
automatic
embroidery mechanism:
28
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