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A hinge or pivot. The first figure, in the annexed woodcut, is designed to show the general form of a door, as we find it with a pivot at the top and bottom in ancient remains of stone, marble, wood, and bronze. The second figure represents a bronze hinge in the Egyptian collection of the British Museum: its pivot is exactly cylindrical. Under these is drawn the threshhold of a temple, or other large edifice, with the plan of the folding-doors. The pivots move in holes fitted to receive them, each of which is in an angle behind the antepagmentum. The Greeks and Romans also used hinges exactly like those now in common use. Four Roman hinges of bronze, preserved in the British Museum, are shown in the following woodcut.

Cardo

A hinge or pivot. The first figure, in the annexed woodcut, is designed to show the general form of…

"A plan of this slide; the divided drum of the screw is omitted for sale of clearness. The screw S has a shoulder at k, carefully fitted and ground to a bearing so as to work sweetly in a hole in the very strong spring o o; the other extremity of the screw is formed into a pivot, which fits a hole in the brass piece B B. The end of this pivot—hrdened, polished, and slightly rounded—rests on the flat surface of an agate a, which is imbedded in the end of the slide, and kept firmly in its place by the brass piece B B." —The Encyclopedia Britannica, 1903

Micrometer

"A plan of this slide; the divided drum of the screw is omitted for sale of clearness. The screw S has…

This design features an adjustable plough allowing for the wing to pivot.

Landscaping Plough

This design features an adjustable plough allowing for the wing to pivot.

A pulley is a mechanism of a wheel on an axle or shaft that may have a groove between two flanges around its circumference. A rope usually runs over the wheel and inside the groove, if present.

Sash Pulley

A pulley is a mechanism of a wheel on an axle or shaft that may have a groove between two flanges around…

"Interior mechanism of a spinet. A, Jack; B, tongue; C, quill; D, bristle; E, cloth damper; F, pivot; G, wire."—Finley, 1917

Interior mechanism of a spinet

"Interior mechanism of a spinet. A, Jack; B, tongue; C, quill; D, bristle; E, cloth damper; F, pivot;…

"Fifth wheel, a horizontal plate, bent to form a whole or part of a circle, placed on the forward axle of a carriage. It is designed to support the fore part of the body while allowing it to turn freely in a horizontal plane." Today, the fifth wheel is used in coupling of trailers and towing trucks. -Whitney, 1911

Fifth Wheel

"Fifth wheel, a horizontal plate, bent to form a whole or part of a circle, placed on the forward axle…

"Fifth wheel, a horizontal plate, bent to form a whole or part of a circle, placed on the forward axle of a carriage. It is designed to support the fore part of the body while allowing it to turn freely in a horizontal plane." Today, the fifth wheel is used in coupling of trailers and towing trucks. -Whitney, 1911

Fifth Wheel

"Fifth wheel, a horizontal plate, bent to form a whole or part of a circle, placed on the forward axle…