SINGER 1375A3 - Manual (Page 6)

A: №TJsm, 3),
s JgSi^S^Se^tElFiLrt.
B: i&jiffii®^fl njf±m%, ^f&jiwtciF±w-ji^ir(jas 4);
V. Construction and Adjustments.
1. Starting and stopping.
The main shaft is driven by clutch mechanism, as shown in Fig.5.Depressing
treadle allows chain to pull down the starting lever (l),and bevel of wedge(2) will
drive pulley to engage to clutch wheel and turn the main shaft .Releasing the
treadle quickly after depressing, starting bracket(3) will not be released by hook (4)
until stop block(5) on the side of worm wheel pushing out stopping lever (6) at the
end of the 19th stitch. The clutch wheel is disengaged while brake stop (7) will
move upward and apply pressure to the pulley to slow down the main shaft. As the
needle finishes the 20* stitch (the motion is now actuated by the inertia of itself
only), the speed is considerable lowered, so that enabling the stop bolt (8) plugging
into notch as a positioner.
The pressure of brake stop (7) can be adjusted to create a "soft" stop. While the
machine has been spared in use for several hours and is again to run there always
happens that the notch can not be reached while stopping. This will come back to
normal after several trials on running under no load. Therefore, there w'ill be no
need of further adjustment afterwards.
5 .
1 .
mmTjB
M 19
(1
jv7
2. The starting safety pawl.
To avoid accident caused by careless operating, a safety device is installed at rear
of the machine. The main part of the device is starting safety pawl (9) (as shown in
-
4
-