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Ball chain is a type of chain consisting of small sheet metal balls connected via short lengths of wire. [1] The balls are hollow and have two small antipodal holes. These holes accept a short length of wire deformed on the end like a rivet so that the end is bound inside the ball. The wire is then connected to another ball using the same method.
Swivel designs. A common design for a swivel is a cylindrical rod that can turn freely within a support structure. The rod is usually prevented from slipping out by a nut, washer or thickening of the rod. The device can be attached to the ends of the rod or the center. Another common design is a sphere that is able to rotate within a support ...
U.S. Patent No 8771 drawing image Patent 8771 image close-up of parts Shaker ladder chair with ball swivels on rear legs for tilting. The Shaker tilting chair – named for its ball bearing or ball and socket [A] button mechanism assembled to the back two legs of a wooden chair – allowed a person to lean back in the chair without slipping or scraping the floor.
The top of the post swivels to allow the ball to swing freely. The aim of the game is to knock down the skittles by swinging the ball in an arc round the post (rather than aiming directly at the skittles). [1] It is also the name of a game in which each player spins a spinning top with a string, to knock down skittles, earning points for doing so.
Poi is a performing art and also the name of the equipment used for its performance. As a skill toy, poi is an object or theatrical prop used for dexterity play or an object manipulation. As a performance art, poi involves swinging tethered weights through a variety of rhythmical and geometric patterns. Poi artists may also sing or dance while ...
In addition to the arquebus, the culverin also evolved into the heavier breech-loading swivel gun weighing around 40 kg (88 lb), which required a swivel for support and aiming. This weapon was designed to use removable mug -shaped chambers which were prefilled with gunpowder and projectiles to speed up reloading.
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