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This illustration shows an Anzani Radial Motor with stationary cylinders and its many parts: Exhaust Valve, Valve Tappet, Air-Cooled Cylinders, Magneto, Carburetor, Gasoline Supply Pipe, Induction Tube, Intake Valve.

Anzani Radial Motor, with Stationary Cylinders

This illustration shows an Anzani Radial Motor with stationary cylinders and its many parts: Exhaust…

An portrait of Alexander T. Brown the inventor of the Smith Premier typewriter.

Alexander T. Brown

An portrait of Alexander T. Brown the inventor of the Smith Premier typewriter.

This caliper was commonly used in projects that required great precision. The object of interest is placed in the opening, measured and then removed.

Mechanical Calipers

This caliper was commonly used in projects that required great precision. The object of interest is…

An illustration of a elastic aerial screw with twisted blades. "X, End of driving shaft; v,w, Sockets in which the roots of the blades of the screw rotate, the degree of rotation being limited by steel springs (z, s); ab, ef, Tapering elastic rods forming anterior or thick margins of blades of screw; d c, h g, Posterior or thin elastic margins of blades of screw. The arrows m, n, o, p, q, r, indicate the direction of travel." -Britannica, 1910

Elastic Aerial Screw with Twisted Blades Resembling Wings

An illustration of a elastic aerial screw with twisted blades. "X, End of driving shaft; v,w, Sockets…

"A representation of one of the class of mechanical rabbles known as Witham's machine rabble applied to a double puddling furnace." — The Encyclopedia Britannica, 1893

Mechanical Rabble

"A representation of one of the class of mechanical rabbles known as Witham's machine rabble applied…

"The moderator lamp, invented by M. Franchot about 1836, from the simplicity and efficiency of its arrangements rapidly superseded about all other forms of mechanical lamps. The two essential features of the moderator lamp are (1) the strong spiral spring which, acting on a piston within the cylindrical reservoir of the lamp, serves to propel the oil to the burner, and (2) the ascending tube C through which the oil passes upwards to the burner. The latter consist of two sections, the lower fixed to and passing through the piston A into the oil reservoir, and the upper attached to the burner. The lower or piston section moves within the upper, which forms a sheath enclosing nearly its whole length when the spring is fully wound up." —The Encyclopedia Britannica, 1910

Moderator Lamp

"The moderator lamp, invented by M. Franchot about 1836, from the simplicity and efficiency of its arrangements…

"The printing press- originating at the middle of the fifteenth, the art of printing continued to be conducted until the middle of the seventeenth century in a very clumsy manner." -Lupton

Modern Printing Press

"The printing press- originating at the middle of the fifteenth, the art of printing continued to be…

The four fundamental forms of resistance: A, to tension; B, to compression parallel to fiber; C, to compression at right angle to fiber; D, to transverse tension; F, fiber of wood. Arrows indicate direction of force.

The Forms of Resistance

The four fundamental forms of resistance: A, to tension; B, to compression parallel to fiber; C, to…

This furnace is used to purify a gold concentrate. The gold concentrates, if non-pyritic, are treated in grinding pans in the bottom of which mercury is placed. The amalgam (mercury alloy), after squeezing out the excess mercury, is heated in the retort, to distil (separate) off the rest and leave the gold, which is then melted and cast into bars of gold bullion of varying fineness.

Retort Furnace for Gold Bullion

This furnace is used to purify a gold concentrate. The gold concentrates, if non-pyritic, are treated…

A diagram illlustrating the principal of the screw.

Diagram of a Screw

A diagram illlustrating the principal of the screw.

A typewriter is a mechanical or electromechanical device with a set of "keys" that, when pressed, cause characters to be printed on a medium, usually paper. For much of the 20th century, typewriters were indispensable tools for many professional writers and in business offices. By the end of the 1980s, word processor applications on personal computers had largely replaced the tasks previously accomplished with typewriters. Typewriters, however, remain popular in the developing world and among some niche markets, and for some office tasks.

Typewriter

A typewriter is a mechanical or electromechanical device with a set of "keys" that, when pressed, cause…

A typewriter is a mechanical or electromechanical device with a set of "keys" that, when pressed, cause characters to be printed on a medium, usually paper. For much of the 20th century, typewriters were indispensable tools for many professional writers and in business offices. By the end of the 1980s, word processor applications on personal computers had largely replaced the tasks previously accomplished with typewriters. Typewriters, however, remain popular in the developing world and among some niche markets, and for some office tasks.

Open Typewriter

A typewriter is a mechanical or electromechanical device with a set of "keys" that, when pressed, cause…

This illustration shows a six cylinder motor and its many parts: Intake Manifold, Centrifugal Pump, Magneto, Carburetor, Spark Plug, Tractor Screw Shaft, Intake Valve, Exhaust, Exhaust Valve, Water Outlet.

Vertical Type Motor, Six Cylinder

This illustration shows a six cylinder motor and its many parts: Intake Manifold, Centrifugal Pump,…

"...the mechanical advantage of this machine (wheel and axle) equal the ratio between the radii, diameters, or circumferences of the wheel and of the axle." -Avery 1895

Wheel and Axle with Rope and Bucket

"...the mechanical advantage of this machine (wheel and axle) equal the ratio between the radii, diameters,…