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2. Balance wheel - Wikipedia

   en.wikipedia.org/wiki/Balance_wheel

   A balance wheel, or balance, is the timekeeping device used in mechanical watches and small clocks, analogous to the pendulum in a pendulum clock. It is a weighted wheel that rotates back and forth, being returned toward its center position by a spiral torsion spring , known as the balance spring or hairspring .

3. Sewing machine needle - Wikipedia

   en.wikipedia.org/wiki/Sewing_machine_needle

   The majority of sewing machine needles are made of various grades of hardened steel coated with either nickel or chromium, though certain specialty needles are coated with titanium nitride on top of chromium. Titanium nitride is a reflective golden-colored ceramic material which reduces abrasion allowing the needle to stay sharper longer and ...

4. Sewing-Machine Needles - Wikipedia

   en.wikipedia.org/wiki/Sewing-Machine_Needles

   Sewing-Machine Needles, also known as Rocas Ministro Ezcurra [1) is a group of three prominent rock needles, the highest 45 m above water, lying close southeast of Rancho Point, Deception Island, in the South Shetland Islands

5. Tracing wheel - Wikipedia

   en.wikipedia.org/wiki/Tracing_wheel

   A tracing wheel, also known as a pattern wheel, pounce wheel, and dart wheel, is an instrument with multiple teeth on a wheel attached to a handle. The teeth can be either serrated or smooth. It is used to transfer markings from sewing patterns onto fabric with or without the use of tracing paper, [1] and can be used to make slotted perforations.

6. Sewing machine - Wikipedia

   en.wikipedia.org/wiki/Sewing_machine

   Diagram of a modern sewing machine Animation of a modern sewing machine as it stitches. A sewing machine is a machine used to sew fabric and materials together with thread. Sewing machines were invented during the first Industrial Revolution to decrease the amount of manual sewing work performed in clothing companies.

7. Wheeler & Wilson - Wikipedia

   en.wikipedia.org/wiki/Wheeler_&_Wilson

   Allen B. Wilson filed two important patents for Wheeler & Wilson's sewing machines: the rotating hook and the four-motion feed. [2] His first machine formed a lock stitch by means of a curved needle on a vibrating arm above the cloth plate, and a reciprocating two-pointed shuttle traveling in a curved race below the plate.