Author name: svuserguy

Early telephones were technically diverse. Some used liquid transmitters which soon went out of use. Some were dynamic: their diaphragms vibrated a coil of wire in the field of a permanent magnet or vice versa. Such sound-powered telephones survived in small numbers through the 20th century in military and maritime applications where the ability to

A typewriter is a mechanical or electromechanical machine for writing characters similar to those produced by printer’s movable type. Typically, a typewriter has an array of keys, and pressing one causes a different single character to be produced on the paper, by causing a ribbon with dried ink to be struck against the paper by

The electrical telegraph, or more commonly just telegraph, superseded optical semaphore telegraph systems, thus becoming the first form of electrical telecommunications. In a matter of decades after their creation in the 1830s, electrical telegraph networks permitted people and commerce to transmit messages across both continents and oceans almost instantly, with widespread social and economic impacts.

A drywasher is a common desert mining tool for gold mining. A drywasher is like a highbanker, since it uses a motor and a form of sluice, but it has no need for water. It drywasher operates by the use of air. By forcing air to flow up through the material as it moves down

Wire stretchers are used to provide the proper amount of tension on wire fences. A tight fence protects livestock and wildlife from getting tangled in the fence which could cause injury or even death.

A wood-burning stove is a heating appliance capable of burning wood fuel and wood-derived biomass fuel, such as sawdust bricks. Generally the appliance consists of a solid metal (usually cast iron or steel) closed firebox, often lined by fire brick, and one or more air controls (which can be manually or automatically operated depending upon

Mimeograph The stencil duplicator or mimeograph machine (often abbreviated to mimeo) is a low-cost duplicating machine that works by forcing ink through a stencil onto paper. The mimeo process should not be confused with the spirit duplicator process. Mimeos, along with spirit duplicators and hectographs, were a common technology in printing small quantities, as in