Lewis 17 - Page 25

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82. To adjust needle penetration in the canvas, turn crown
adjustment screw 1493, Figure· Q, to the right to stop the plunger rise,
which, in turn, causes the needle to penetrate less deeply. Turning
crown adjusting screw 1493 to the left tends to raise the plunger, which
allows the needle to penetrate more deeply into the canvas.
83. On overcoats it is especially desirable to make. the above·
adjustment so as to permit needle to pass through the canvas and
thro~gh part of the undergoods on the canvas side. On sack coats this
deep penetration is not necessary or desirable, and should be guarded
against. The needle should not enter the fore-part on sack coats
unless you desire to produce what is termed as a "pricked edge"
finish .
84. If the needle penetrates the facing at the time it should
penetrate the canvas only, lower the plunger by turning plunger adjust-
ing knob LS 219, Figure M, to the left sufficient to permit the needle to
slide over the facing goods.
85. Lewis Model 24-12 machines, unless otherwise specified,
are fitted with presser foot 1571A and relating parts for work on sack
coats.
86. Parts for changing Lewis Model 24-12 machine from sack
coats to overcoats and vice versa are as follows:
SACK COAT PARTS TOPCOAT PARTS
OVERCOAT P,ARTS
1 1571A- Foot
1 1593A - Foot
1593SA - Foot
1
1578) Plunger
1 1591} Plunger 1591-1/2} Plunger
1
1579} Complete l 1592) Complete
1592-1/2} Complete
l
1584 Plunger Spring
l
1310 Plunger Spring
1310 Plunger ·Spring
1?