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The kaleidoscope is a toy that usually contains 3 mirrors and many small loose colored objects (beads, glass etc) contained within a tube. This tube contains an eyepiece and as the viewer looks into it the light coming into the other end of the device creates a colorful pattern. This occurs due to the reflection from the mirrors. The tube can be rotated and the loose objects move around to change the colors and patterns that can be seen. Let’s take a look at who invented this popular toy.
Windshield wipers, also known as windscreen wipers, are used to clear rain and other foreign material from the windshield to improve visibility. Almost every type of moving vehicle is fitted with windshield wipers and in most jurisdictions they are a legally required to have fitted to the vehicle. The wipers are attached to the outside of the vehicle and move back and forth to clear the windshield. The part of the wiper that comes into contact with the windshield is made of rubber to avoid scratching the glass. If you have ever wondered who invented this important safety device, keep reading to find out.
Toilet paper is considered, by many people, to be an essential everyday product. It is most commonly used for cleaning after defecation or urination, but has many secondary uses as well. The first documented use of toilet paper dates back to 6 AD in China, but it became an essential household commodity much later. Let’s take a look at who invented this important product.
The barcode is a set of numbers and lines that are found on almost every product imaginable. A barcode can be scanned and interpreted to show data about an object. Most barcodes are designed to be read by special optical scanners. Barcodes are made unique by varying the number of lines, width of those lines and the spaces between them. Newer barcodes include a variety of geometric shapes such as triangles, hexagons and rectangles and can be scanned using computers and smartphones. Barcodes are now used to track just about every item brought or sold around the world. So who invented the first barcode? Read this article to learn more.
Judo is a full contact martial art that originated from Japan. The object is to throw or takedown your opponent to the ground, immobilize them with a grapple or to force an opponent to submit by joint locking, strangle hold or choke. Unlike many other forms of combat the aim of judo is to avoid the strength of the opponents and use that strength against them. Like other martial arts, judo uses a ranking system that is shown by colored belts worn with white uniforms. Let’s take a look at who invented this popular martial art.
Teddy bears are soft stuffed toy that are designed to look like a bear. They are popular gifts to show affection, collected by teddy bear enthusiasts and are also much loved by children all around the world. It is estimated that the retail sales for teddy bears in 2011 will top $1.5 billion. Let’s take a look at who invented this popular toy.
If you take a look at the first 6 letters on the top line of your keyboard and you will mostly likely see QWERTY. This is the most commonly used arrangement of keys in keyboards today. In fact, we are so familiar with this combination that it is used on many other devices as well. If you have ever wondered who came up with this combination, keep reading to find out.
The Thermos Flask, also known as a vacuum flask, is a vessel mostly used for storage of hot or cold liquids. It uses the principle of a vacuum to keep the contents warmer or colder than the surrounding environment. It consists of two vessels and one is placed inside of the another. The small space between the vessels is evacuated of any air allowing a vacuum to form. This vacuum stops the transfer of heat between the middle container to the outer container and then into the outside environment. They are generally made of glass, plastic, metal and foam. Thermos flasks have a reflective coating that further diminishes heat transfer.
Volleyball is a popular team sport with two teams that are separated by a net. The goal of the game is to score points by grounding the ball in the oppositions area, or when the other team commits a fault (touching the net, hitting the ball outside the court, hitting under the net etc.). Each team is allowed to touch the ball 3 consecutive times, but it must be hit to the oppositions court on the 3rd touch. The ball cannot be caught, thrown or kicked and must be hit with the hard or arm only. Let’s take a look at who invented this unique sport.
The protractor is a mathematical instrument used for measuring or drawing angles. Most protractors use degrees as the unit of measurement and this is printed on the device. The two main types of simple protractors are the half circle protractor (180 degrees) and the complete circle (360 degrees). There are also more complex models such as the bevel protractor and 3 arm protractor (station pointer). Continue reading to find out who invented this important measurement tool.