The basic structure of sewing machine is the same whether it is hand-operated sewing, treadle sewing machine or electric sewing machine. The basic parts of a sewing are listed below and seen in Fig.1
Fig. 1 Parts of a Sewing Machine
1. Spool pin: It is fitted on
top of the arm to hold the reel.
2. Thread guide: It holds the
thread in position from the spool to the needle.
3. Tension disc: The two
concave discs put together with the convex sides facing each other.
The thread
passes between the two. The tension of the thread is adjusted by a spring and
nut which increases or decreases pressure
4. Take up lever: It is a
lever fitted to the body of the arm. Its up and down motion feeds the thread to
the needle and tightens the loop formed by the shuttle.
5. Needle bar: This is a
steel rod to hold the needle at one end with the help of a clamp. Its main
function is to give motion to the needle.
6. Bobbin case: This moves
into position to catch the top thread and form the stitch as the needle is
lowered into the bobbin chamber.
7. Presser foot: It is fixed
to the presser bar to hold the cloth firmly in position when lowered.
8. Presser foot lifter: A
lever attached to the presser bar for raising and lowering the presser foot.
9. Stitch regulator: This
controls the length of the stitch.
10. Bobbin winder: A simple mechanism used for winding thread on the bobbin.
11. Fly Wheel: When this is made to revolve, it works the mechanism of the
motion
12. Clutch or Thumb Screw: This is in the center of the fly wheel and it engages and
disengages the stitching mechanism.
No comments:
Post a Comment