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A vibrating shuttle is a bobbin driver design used in home lockstitch sewing machines during the second half of the 19th century and the first half of the 20th century. It supplanted earlier transverse shuttle designs, but was itself supplanted by rotating shuttle designs.
A hypnic jerk, hypnagogic jerk, sleep start, sleep twitch, myoclonic jerk, or night start is a brief and sudden involuntary contraction of the muscles of the body which occurs when a person is beginning to fall asleep, often causing the person to jump and awaken suddenly for a moment.
The rotary hook or rotating hook is a bobbin driver design used in lockstitch sewing machines since the 19th century. It triumphed over competing designs because it can run at higher speeds with less vibration. Rotary hooks and oscillating shuttles are the two most common bobbin drivers in use today.
Investors in semiconductor stocks are feeling less worried about a very important risk factor.
Illustration of forces in muzzle rise. Projectile and propellant gases act on barrel along barrel centerline A. Forces are resisted by shooter contact with gun at grips and stock B. Height difference between barrel centerline and average point of contact is height C. Forces A and B operating over moment arm / height C create torque or moment D, which rotates the firearm's muzzle up as ...
The name "Janome" (蛇の目) literally means "snake's eye." It was taken from the appearance of the bobbin design at the time of brand establishment in 1935, when the newer, round bobbin system was starting to replace the traditional long shuttle. As the new round bobbin looked like a snake's eye, Janome was chosen as the company's name. [3]
The night before the big jump, the soldiers went out on the town for drinks, a movie, and more drinks. The movie they most likely saw was Geronimo, a western film about the Apache Indian chief of ...
A patent illustration of the Osann portable sewing machine. A typical early 20th century sewing machine, like the Singer 27, was designed to be mounted in a treadle or table, and though reduced-size models with hand cranks and wooden cases were introduced, their weight strains the meaning of the word 'portable.'