SINGER WHA-1 - Manual (Page 10)

NON-
JAMMIHG
FEATURE
18
Fig- ITi
One of the outstanding engineering inno-
vations incorporated in this machine eliminates,
for all practical purposes, the age old problem
of jamming.
Other round bobbin, oscillating machines tend
to jam, or freeze, when thread is impropetly
introduced into the race assembly. This
nitroduction of alien thread is usually the
result of sewing without material tn the ma­
chine or of turning the balance wheel back­
wards while the machine is threaded.
Should this happen while you are using your
machine, the thread will simply break and,
by the action of a scientifically cut hook.
the thread will be swept out of the race and
the machine freed almost instantly. The ma
chine may seem to become stiff for a
moment. Do not be afraid to free the ma­
chine by turning the balance wheel TOWARD
YOU by hand.
Your dealer will be happy to show you the
operation of the precision engineered single
screw race assembly and to explain the action
of the cut hook in preventing jamming.
OTHER EXCLUSIVE FEATURES
Automatic Darner i A new design with a
self adjusting spring loading mechanism. By
pressing the release spring the pressure bar
foot is relieved so that you may darn, mend,
embroider or monogram. (Fig. 4, page 8.)
Deck Drop Feed : By turning this device
to DOWN position the ma-
chine can be made to stop
tV feeding automatically and
f
* ; t;,g material guided by hand.
Used with the automatic
darner, this will make darn­
ing, monogramming, etc. much easier. The
special, exclusive adjustment for SILK makes
it possible to sew this fine material without
snagging.
Hinged Slide Plate: This exclusive improve­
ment makes it possible to reach the bobbin
case easily by giving you much more hand
room than in any other machine. (Fig. 4, page
19