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Technology Reference Libraries

Page 8 of about 91 Articles
Telephone
2010-10-04 16:28:51

The telephone is a telecommunications device that transmits and receives sound generally the human voice. The phone's basic function is to allow people who are separated by large distances to talk with each other. The telephone is used across the world and is one of the most common appliances in the developed world. The phone is designed to have a microphone, an ear piece which reproduces...

Stapler
2010-10-04 16:15:56

Staplers, used widely in government, business, offices, and schools, are mechanical devices that join sheets of paper by driving a metal staple through the paper. The first stapler was created for King Louis XV. Each staple was inscribed with the insignia of royal court. George McGill created the predecessor of the modern staple. In 1867, he received a patent for a press to insert his...

Cathode Ray Tube
2010-10-04 16:07:17

The Cathode Ray Tube, which has internal or external means to accelerate and deflect electron beams, is a vacuum tube containing an electron gun and a fluorescent screen. The electron beams that are deflected are used to create images in the form of light emitted from the fluorescent screen. The CRT works by using an evacuated glass envelope which is large, deep, heavy, and relatively fragile....

Dynamite
2010-09-29 16:59:34

Dynamite, invented by Swedish chemist Alfred Nobel in 1867, is an explosive that harnesses the potential of nitroglycerin to explode. Normally it is sold in an 8 inch long stick and weighs about .6 pounds although other sizes do exist. TNT is usually the standard by which explosive power is gauged; however, dynamite actually has more than 60% greater energy density than TNT. Nitroglycerin...

Incandescent Light Bulb
2010-09-29 16:52:36

The incandescent light bulb provides a source of electric light through incandescence. The bulb works by passing current through a filament which heats to a temperature that produces light. The glass bulb that contains the filament prevents oxidation of the hot filament. The bulbs are also called electric lamps. Incandescent bulbs come in a various sizes and voltages. They can range from...

Mason Jar
2010-09-27 17:29:21

A Mason jar, invented by Rick Mason in 1858, is a glass jar used in canning to preserve food. Ball Corp. manufactured the jars early on and the name ball jar was also applied to the jars. In mass-production they have been replaced by other methods; however, in the home they are still widely used for canning. Usually the jars have a two piece lid composed of a inner flat metal which is...

Bunsen Burner
2010-09-27 17:09:09

A Bunsen burner produces a single open gas flame; it is commonly found in labs - used for heating, sterilization, and combustion. Robert Bunsen, in 1852, was hired at the University of Heidelberg and promised a new laboratory building. Heidelberg had just started installing coal-gas street lighting which provided light but not necessarily heat. Laboratory lamps, at the time, left much to be...

Kaleidoscope
2010-09-24 16:28:55

A kaleidoscope, a tube of mirrors containing looks colored objects such as bead and pebbles, is used by the viewer looking in one end while light enters the other end. Sir David Brewster invented the Kaleidoscope and also coined the term. The term translates to "observer of beautiful forms." The Kaleidoscope operates on the principle of multiple reflection. Usually there are two rectangular...

Gas Stove
2010-09-24 16:20:41

A gas stove is a cooking device which uses natural gas, propane, butane, Liquefied petroleum gas or other flammable gas as a fuel source. Since the gas pipe network was slow to develop, the success of the gas stove on a commercial level took some time to happen. Gas stoves were invented as early as the 1820's as isolated experiments but it was not until the 1880's that manufactured stoves...

Barometer
2010-09-23 15:29:32

A barometer is an instrument that measures atmospheric pressure. The barometer measures pressure exerted by the atmosphere using water, air, or mercury. Through measuring the pressure one can forecast short term weather changes. Evangelista Torricelli is credited with the invention of the barometer in 1643. However, Gasparo Berti unintentionally built a water barometer around the same time....

Word of the Day
mundungus
  • A stinking tobacco.
  • Offal; waste animal product; organic matter unfit for consumption.
This word comes from the Spanish 'mondongo,' tripe, entrails.