How does a spinning wheel work?

The spinning wheel spins thread by means of a spindle which twists the drawn fibers of cotton or wool together.

The old spinning wheel, so common to colonial houses, is a simple machine for spinning yarn or thread.  It has a large wheel that is turned by hand or by a fool pedal.

Spinning is the process of twisting fibers into yarn or thread.

To make thread on a spinning wheel, the spinner pulls some of the fibers from a roll of straightened wool or cotton and fastens them to the end of a pulley-driven spindle.

Spinning Wheel

While drawing out the fibers, the spinner turns the wheel, which spins the spindle.  The spindle, in turn, twists the drawn fibers into one continuous thread, which winds around a spool.

Only one thread can be made at a time on a spinning wheel.  After the thread is made, it can be woven into cloth on a machine called a loom.

Today, most spinning and weaving is done in factories.  Modern spinning machines can make hundreds of threads at a time.–Dick Rogers

How is our voice recorded on a tape recorder?

Tapes are recorded by printing magnetic patterns of sound on a special plastic tape.

A tape recorder stores the sound of your voice on a thin, plastic tape that has been treated with a chemical so it can be magnetized.

Tape  Recorder

To make a tape recording of your voice, you speak into a microphone.

The microphone changes the sound waves into electrical signals that go into a part of the recorder called the recording head.

The ribbon-like tape moves through the recording head as it unwinds from one spool to another.

The electrical signals made by your voice turn the recording head into a magnetic which prints a kind of magnetic picture of the sounds on the tape.

When the tape is played, it is run past the recording heat again.  But this time, the magnetized tape magnetizes the recording head.

The recording hear changes the magnetism into  electricity, and a speaker turns the electricity  into sound waves just like those your voice made. – Dick Rogers