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The ceiling fan is an electronic device with rotating arms, called blades, that is attached to the ceiling to help circulate the air. They rotate relatively slowly and work on the principle of introducing air movement into a still, hot room. Unlike an air conditioner, a ceiling fan does not cool the actual room itself. They rely on evaporative cooling, which helps to speed up the evaporation of perspiration on the human skin. This is certainly not as effective as an air conditioner, but they are quite effective and very popular because they use far less power than an air conditioner. Let’s take a look at who invented the ceiling fan.
From the time we get our first teeth we have all been taught that brushing our teeth is very important. Brushing our teeth not only keeps our mouth clean, but it also prevents the buildup of plaque and tartar. This can cause problems such as tooth cavities and gingivitis (gum disease). Although a manual toothbrush is very effective for cleaning your teeth when used correctly, there are certain situations where an electric toothbrush is highly beneficial. If you have ever wondered who invented this useful device, read on to find the answer.
A doorbell is any device that is used to alert the owner to the presence of a visitor. Traditionally these devices were simply a bell that was hung close to the front door. This was connected to a short rope so it could be rung. Prior to the invention of the doorbell, door knockers were commonly used on the front door. The modern versions utilize electricity to send a chime or other tone throughout the house. Today, it is very common for households to have an electric doorbell, especially if they have a large house. If you have ever wondered who invented the useful device, continue reading to find out.
A kettle is a small kitchen appliance used for boiling water. The most common use for a kettle is for making tea and coffee, and this is where it gets its alternative name – the tea kettle. The two main varieties of kettles, the stovetop kettle and the electric kettle. The first is placed on a stovetop to heat the water, and the electric kettle utilizes a heating element that is powered by electricity. If you have ever wondered who invented this useful appliance, continue reading to find the answer.
The slinky is an iconic toy that has retained its popularity since its invention. The device itself is quite a simple spring design, but it performs a number of tricks that are very popular with children. The most memorable trick is the slinky traveling down a flight of stairs without any assistance. It was added to the Toy Hall of Fame in 2000 and was named as one of the most creative and memorable toys of the 20th century by the Toy Industry Association. If you have ever wondered who invented this amazing toy, read on to find out.
Dynamite is a powerful explosive that has been used in many different applications since it was patented in 1867. It is commonly confused with TNT, but there are no common features between them. In fact, dynamite provides a more powerful explosion than TNT. Dynamite is made with an absorbent substance, such as sawdust, soaked in nitroglycerin. This is packed into a protective coating and a blasting cap and fuse are added to complete the stick of dynamite. If you’ve ever wondered who invented this explosive, continue reading to find out.
Bifocal glasses are designed with 2 different lenses in the one pair of glasses. They are generally used by people who have diminished eyesight and also require correction for nearsightedness. This allows the wearer to see clearly at all times, while also providing focus for tasks such as reading. Traditionally they were made of two separate lenses, but today a small section for reading is molded into the main lens.
A mouthguard is a device used to prevent injury to the mouth, especially teeth, during physical activity. They are popular in contact sports, such as boxing and hockey, where injuries to the mouth are common. Wearing a mouthguard has become compulsory in many sports where impacts to the head or face are common. Mouthguards are also used for various dental treatments and procedures, such as teeth whitening.
The pager, also called a beeper, is a device used for receiving short messages. Basically, a message is sent from a telephone or email and the pager beeps or vibrates to alert the user to the message. They are used by people that require a reliable notification system, such as medical professionals, and in areas where cell phone coverage in unreliable. The pager was once the most popular personal communication device, but their popularity has declined since the cell phone reached the mainstream market. Have you ever wondered who invented this device? Read on to find out.
Text messages are short written messages that can be sent between electronic equipment such as cell phones and web sites. Also known as SMS (short message service), text messages are a common and quick form of communication and is the most widely used data application in the world. 74% of cell phone owners engage in text messaging. Whilst originally, an SMS referred to only text, they can now include video, photo and audio files. The keys on a cell phone are used to type messages using the letters of the alphabet.