Stitch-Forming Mechanisms The stitch-forming mechanisms are the mechanical components; with perfect synchronization between the parts they form stitches. The various kinds of stitch-forming components are Thread control devices, which include tensions and take-ups; The needle, The feed dogs, Throat plate, tongues, and chaining devices The presser foot, The rotary sewing hook, Loopers & spreaders Bobbin and the bobbin case. Proper stitch formation is based on the suitable combination of these components and their accurate synchronization. 4.6.1 Thread control devices Thread control devices comprise thread guides, tension devices, and take-up lever, which are essential to provide even and uniform thread movement. Thread guides direct the positioning and …show more content…
Step 3: As the needle keep on to rise and the hook progresses in its rotation, the needle-thread take-up lever gives sufficient slack thread to be drawn down through the fabric to increase the size of the loop. Step 4: On the first rotation of sewing hook, it carries the needle-thread loops around the bobbin case and bobbin, the inside of the loop sliding over the face of the bobbin-case whilst the outside passes around the back, to encompass the bobbin-thread. As the needle-thread take-up starts to rise, the loop is drawn up through the ‘cast-off’ opening of the sewing-hook before the revolution is complete. Step 5: During the second revolution of the sewing-hook the thread take-up lever completed its upward stroke, drawing the slack needle thread through the fabric and set the stitch. In the meantime, the feed dog moved the fabric along with it and drawing the required length of under-thread from the bobbin. The presser-foot protects against the slippage by gripping the fabric firmly against the teeth of the feed dog while the feed dog is carrying the fabric across the smooth face of the throat
“I would like to introduce you to my son, Wind-Wolf.”(pp.75) This hook that Wind-Wolf’s father uses caught the teacher’s attention instantly because this hook is making a mockery of the teacher. This is a mockery to the teacher because it is telling the teacher that she/he doesn’t know his son at all. So the father reintroduces his son to the
Step4: Put flour on a surface and roll the dough until its ¼ in thickness.
Annie glares up at me and proceeds to stitch with frenzy, staring straight ahead, not bothering to look down at her work. Noticing her long, irregular stitches I point to her oversight and say, “Why Annie, I think your needle has gone off on its own.”
for the human specimen. A combination of experience, modern technology and on-feet thinking is used to bypass
mean that we will to set up the apparatus in a way that would give us
A sequential compression device is an inflatable cuff that you wear around your leg or foot. The device works like the muscles of your leg by compressing your blood vessels. It inflates at a programmed rate to force old blood out of your legs and let in freshly oxygenated blood.
How the polymer chains are put together is important, as it improves the properties of the material. The flexibility, strength and stiffness of Kevlar fiber, is dependent on the orientation of the polymer chains. Kevlar fiber is an arrangement of molecules, oriented parallel to each other. This orderly, untangled arrangement of molecules is described as a “Crystalline Structure”. A manufacturing process known as ‘Spinning’ is needed to achieve this crystallinity structure.
He took the bottom blanket off his straw mat and cut it into wide strips wrapping them over the thin moccasins he wore to reinforce them. Next, he tore a piece of the blanket long enough to cover his head and ears. And the last part of the blanket he wrapped around his bottom half.
The definition this paper will use for cohesion is ‘forces acting on the members ...
Quilts symbolize a family’s heritage. Maggie adheres the tradition by learning how to quilt from her grandmother and by sewing her own quilts. Maggie also puts her grandmother’s quilts into everyday use. Therefore, when Dee covets the family’s heirloom, wanting to take her grandmother’s hand-stitched quilts away for decoration, Mama gives the quilts to Maggie. Mama believes that Maggie will continually engage with and build upon the family’s history by using the quilts daily rather than distance herself from
In the Article “Sewing Machines Liberation or Drudgery for Women” Joan Perkin wrote about the positive and negative effects that came from the invention of the sewing machine. The sewing machine was invented by Elias Howe and Isaac Merritt Singer in the 1800’s. by 1877 almost half a million sewing machines were being used in the United States, making it the first home appliance in American homes. The author writes that this invention will transform the way clothing would be made from then on. Before the sewing machine women would make their clothes by hand at home, it would take up to twenty hours to produce one shirt. With this new invention the time was cut down to about an hour for the same amount of work.
Weaving is a common thread among cultures around the world. Weaving is a way of producing cloth or textile. Today we have machines that weave large-scale textiles at cheap prices. Production of cloth by hand is rarely engaged in today’s Westernized societies. Not many people are thinking about how the fibers are actually constructed to make their clothes. However, in other cultures across the world the tradition of weaving still exists. By comparing three cultures that continue weaving as a part of their tradition we can see similarities and the differences between them. The reasons that each culture still weaves vary, as do the methods and materials. The desired characteristics of the cloth also vary around the world as each culture values different aesthetics.
Gears, also known as cogs, sprockets, ratchets have existed since the invention of rotating machinery, providing machines with constant mechanical advantages increasing torque or speed of the shaft. Some of the fist gears developed were wooden pegs fitting onto slots. These setups were often greased with animal fat or wax to allow smooth operation.
During the Industrial Revolution, the textile industry received high demand for its cloth goods. However, the production of such goods was very slow. As demand rose, the need for a faster, cheaper, and more efficient way of producing enough cloth goods became more urgent. Thus, inventors began developing new ways to produce cloth goods. One of the best examples was English inventor James Hargreaves. Hargreaves invented the spinning jenny, a device in which spinners would use his right hand to quickly spin a wheel to rotate spindles and spin 8 threads around 8 spindles attached to a wooden frame. Since each spinning jenny could spin several threads simultaneously, the device dramatically increased the rate at which cloth was produced and the quantity of cloth that was made. This allowed for the textile industry to meet the large demand for cloth goods of the time and enhance their method of produ...
Due to James Kay’s invention of the flying shuttle, there was a great imbalance in the 1730’s between weavers and spinners. Kay made it possible for weavers to quickly produce the amount of fabric that was demanded, but the spinners were still unable to make thread t...