S jgsi^s^se^telfilrt – SINGER 1375A3 User Manual

Page 6

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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.






M 19



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




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