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A swivel, swivelling, spinny, or revolving chair is a chair with a single central leg that allows the seat to rotate 360 degrees to the left or right. A concept of a rotating chair with swivel castors was illustrated by the Nuremberg noble Martin Löffelholz von Kolberg in his 1505 technological illuminated manuscript , the so-called Codex ...
First of all, a threaded bar is inherently weaker than a solid bar of the same diameter. Then there is the issue of the welds not holding. When a boat swings on a well-embedded anchor, this can cause strong lateral loads on the swivel, causing its jaws to be pried open - thus disconnecting the chain from the swivel. Hence the above advice from ...
Bar stools are often made of wood or metal. There are bar stools with and without armrests, backs, and padding or upholstery on the seat surface. Bar stools can range from basic wooden designs to more complex ones with adjustable height. Extra tall and extra short are common features, as well as indoor bar stools and outdoor bar stools. Some ...
Turned stools were the progenitor of both the turned chair and the Windsor chair. The simplest stool was like the Windsor chair: a solid plank seat had three legs set into it with round mortice and tenon joints. These simple stools probably used the green woodworking technique of setting already-dried legs into a still-green seat. As the seat ...
Five bar linkages often have meshing gears for two of the links, creating a one DOF linkage. They can provide greater power transmission with more design flexibility than four-bar linkages. Jansen's linkage is an eight-bar leg mechanism that was invented by kinetic sculptor Theo Jansen. Klann linkage is a six-bar linkage that forms a leg mechanism;
An ottoman is a short stool that is intended to be used as a footrest but can sometimes be used as a stool. If matched to a glider chair, the ottoman may be mounted on swing arms so that the ottoman rocks back and forth with the main glider. A chair cover is a temporary fabric cover for a side chair. They are typically rented for formal events ...