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[1] Danner invented the John Danner Revolving Bookcase, a pivot and post revolving bookcase. He patented the bookcase on May 16, 1876. [1] [2] [3] His bookcase hangs suspended from a simple cast iron bearing which sits on top of an inner column or post. The revolving mechanism consists of two nesting cast iron cones that provide a precise pivot ...
The company patented the "elastic bookcases" also known as a modular bookcase or barrister's bookcase. These were high-quality stacking book shelves, with a standard width of 34 inches, in oak, walnut and mahogany, capable of being adapted to fit together to form a bookcase which could either be all of the same measurements or which could be ...
Gullwing doors with a second hinge between door and moving roof panel are called falcon wing doors. Scissors – rotate vertically at a fixed hinge at the front of the door, and open by rotating on a horizontal axis, perpendicular to the vehicle's length. Scissor doors that also move outward while rotating are called dihedral synchro-helix ...
A revolute joint (also called pin joint or hinge joint) is a one-degree-of-freedom kinematic pair used frequently in mechanisms and machines. [1] The joint constrains the motion of two bodies to pure rotation along a common axis. The joint does not allow translation, or sliding linear motion, a constraint not shown in the diagram. Almost all ...
The bookcase's first inclusion in the IKEA Catalogue was in the 1979 edition. [1] Initially the bookcases were 90cm wide, but this was revised to 80cm in 1988 following complaints from customers that the shelves bent under the weight of the books and the item didn't fit on IKEA transport pallets.
An ornate brass door hinge A barrel hinge. A hinge is a mechanical bearing that connects two solid objects, typically allowing only a limited angle of rotation between them. Two objects connected by an ideal hinge rotate relative to each other about a fixed axis of rotation, with all other translations or rotations prevented; thus a hinge has one degree of freedom.