How does the old bee pedal sewing machine thread?

The working principle of these sewing machines is similar. They are all connected with the crankshaft connecting rod through the rotation of the big wheel, so that the shuttle frame makes circular reciprocating motion, and the needle can move up and down to achieve the effect of twisting the upper thread into the lower thread.

Threading method of the upper line:

The cotton thread is drawn from the top spool of the machine head and introduced into the twisting ring or groove.

2. Clamp the thread feeder and thread take-up spring on the outside of the needle.

3. Then thread it into the end hole of the thread take-up connecting rod.

4. Clamp the thread down and then pass through the pinhole.

Offline thread method:

Take out the shuttle skin from the shuttle bed and take out the shuttle core.

Take out the cotton thread and put it back in the shed.

3. When pulling the cotton thread, let the spool rotate counterclockwise.

4. Clip the cotton thread into the yellow film of thread pressing, and then pass through the outlet hole.

5. Then put the shed assembly back on the shuttle bed.

Tick the line method is:

Tighten the upper thread and turn the big wheel to make the needle reach the bottom dead center and continue to lift.

2. If the shuttle skin is installed correctly, the thread can be hooked successfully once.

Butterfly sewing machine: Butterfly sewing machine, an early sewing machine brand, has been selling well all over the country since1970s, and it was one of the "three big pieces" of that era.

1927, the first domestic sewing machine in China was born here, named "Golden Lion". In 1946, the word "golden lion" was changed to "invincible", meaning "invincible hand all over the world". 1966, in order to unify the Chinese and English trademark names at home and abroad, Invincible Brand was renamed "Butterfly Brand" again, and the English trademark was "Butterfly". Since then, the trademark "Butterfly Brand" has continued to this day.