Quantcast

Technology Reference Libraries

Page 7 of about 91 Articles
Paper Clip
2010-10-26 18:29:03

A paper clip is a thin wire in a looped shape that uses elasticity and strength of its construction materials to compress and hold pieces of paper together. Other types of clips use a two piece clamping system. Recent innovations are multi-colored plastic-coated paper clips. The first patent for a bent wire paper clip was awarded to Samuel B. Fay in 1867. He wanted it to be used for...

Velcro
2010-10-11 21:19:19

Velcro is a brand name, two layered system of fabric hook-and-loop fasteners. There is a "hook" side, which is a piece of fabric covered with tiny hooks, and a "loop" side, which is covered with even smaller and "hairier" loops. Pressing the two sides together will cause the hooks and loops to catch and hold the pieces together. The hooks and loops can be made of various materials, although...

Liquid Paper
2010-10-11 21:16:18

Liquid Paper, a brand of the Newell Rubbermaid Company, is a type of correction fluid used to fix typewriting in the past and now handwriting mistakes. Bette Nesmith Graham created the first correction fluid in 1951. Since she worked as a typist she made many mistakes and wanted to correct them, so she started with tempera paint and created what she called Mistake Out. She even provided her...

Aerosol Spray
2010-10-08 17:40:50

Aerosol spray is a dispensing system that creates an aerosol mist of liquid particles. The liquid is usually contained in a bottle under liquid pressure that is released when the valve is opened. As the gas in the can expands to drive out the liquid some of the propellant evaporates to maintain an even pressure. Erick Rotheim invented the first aerosol spray can in 1926. Lyle Goodhue and...

Remote Control
2010-10-07 15:50:33

A remote control is an electronic device that can operate another piece of electronic equipment wirelessly from a short line-of-sight distance. Although it goes by many names, it is most commonly called the remote. They are usually small wireless handheld objects with various buttons and settings. Most of the time, the remote contains a much larger majority of controls than the small amount...

Vitascope
2010-10-07 11:54:11

Charles Francis Jenkins and Thomas Armat created the Vitascope, an early film projector, in 1895. They demonstrated the Vitascope at the Cotton States Exposition in Atlanta, they called it the Phantoscope. Armat and Jenkins fought over the rights to the invention and eventually Armat, with legal authority, sold the rights to the Kinetoscope Company. The company eventually approached Thomas...

Zipper
2010-10-07 11:47:51

A zipper is a device that temporarily joins two edges of fabric. It is used in clothing, luggage and other bags, sporting goods, camping gear, and other daily use items. The edges are fixed with tens to hundreds of specially shaped metal or plastic teeth. The teeth, also referred to as elements, can be individual or a continuous coil. The slider moves along the rows of teeth and meshes them...

Metal Detector
2010-10-06 21:55:14

A metal detector is a device that finds metal that may not be visible. The basic metal detector is composed of an oscillator producing an alternating current that passes through the coil producing an alternating magnetic field. If electrically conductive metal is close to the coil then the magnetic field is disrupted and thus the metal detector can sense the hidden metal. The first metal...

Safety Razor
2010-10-06 21:40:54

A safety razor, designed to protect the user from serious injury, is a razor where the facial skin is protected from all but the very edge of the blade. Prior to using a safety razor, most men used a straight razor. These razors, although still available today, are not used very often due to the skill and attention required for use. Jean-Jacques Perret invented the safety razor. A rare...

Roll Film
2010-10-06 21:28:02

Roll film is any type of spool-wound photographic film. The film is protected from white light exposure by a paper backing as opposed to film which is protected by being wound forward in a cartridge. It was originally referred to as "cartridge" film due to its resemblance to a shotgun cartridge. The film can be loaded in daylight since it has an opaque backing paper. During use, the spool of...

Word of the Day
snash
  • To talk saucily.
  • Insolent, opprobrious language; impertinent abuse.
This word is Scots in origin and probably imitative.