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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 ...
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 ...
Small H hinges (3–4 in or 76–102 mm) tend to be used for cabinets, while larger ones (6–7 in or 150–180 mm) are for passage doors and closet doors. HL hinge Commonly used for passage doors, room doors, and closet doors in the 17th, 18th, and the 19th centuries. On taller doors, H hinges were occasionally used between them. Pivot hinge
A hinge joint (ginglymus or ginglymoid) is a bone joint in which the articular surfaces are molded to each other in such a manner as to permit motion only in one plane. [1] According to one classification system they are said to be uniaxial (having one degree of freedom ).
[1] A bookcase may be fitted with glass doors [2] that can be closed to protect the books from dust or moisture. Bookcase doors are almost always glazed with glass, so as to allow the spines of the books to be read. [3] Especially valuable rare books may be kept in locked cases with wooden or glazed doors.