Windshield wipers were invented by a woman named Mary Anderson of Birmingham, Alabama in 1903. When Mary visited New York City in 1902, she took a ride in a trolley car on a very frosty day. The trolley had two separate window panes, and as she watched the motorman, she noticed something interesting; the driver had both panes open because he couldn’t keep the windows clear enough of the downpouring sleet for him to see.
This gave Mary an idea. Back home in Alabama, she immediately hired a designer to help her devise a hand-operated device that could help to keep a windshield clear of ice and snow. She then hired a local company to produce a working model, and in 1903 she applied for and was granted a 17-year patent for her windshield wiper.
Mary’s device consisted of a rubber blade outside on the windshield that was controlled by a lever on the inside of the vehicle. When the driver operated the lever, it caused a spring-loaded arm to move back and forth over the windshield. A counterweight was added to ensure that the wiper would maintain contact with the window.
While there had been some similar devices made earlier, Mary’s was the first one that actually worked effectively.
Mary tried to sell the rights to her windshield trico wipers through a prominent Canadian firm, but she was rejected. They told her that they didn’t consider her invention to be of enough commercial value to warrant them taking on the task. Maybe that wasn’t such a good decision!
Mary’s patent expired in 1920. At just about the same time, the Automobile industry began growing exponentially, and windshield wipers that used her basic design soon began showing up on cars. The manufacturer of Cadillac became the first to adopt the wipers as standard equipment in 1922.
Mary Anderson was born in 1866 in Green County, Alabama.
Many children do not like to wet their beds. They do not like sleeping in urine and they definitely are not fond of waking up wet. More importantly, a lot of kids have a low self-esteem once other people find out about their problem. Normally, most children will outgrow their problems with soaking their mattresses but in some cases they might need medical treatment for this condition so use the dedicated rubber sheet from http://bedsheetadvisor.com.
One way that parents can help to alleviate the problems and frustration associated with bedwetting is by using rubber sheets that are specifically designed to help kids with this problem. Here is a look at rubber sheets for bed wetting that can be used to help improve this unwanted situation.
Types of Rubber Sheets
There are many different types of rubber sheets. The rubber and flannel variety has been fused together and is used to form a protective layer against a person’s skin. The fact is that regular rubber sheets might protect a mattress and even bedding. However, it does not protect a person’s skin from irritating effects of urine. Rubber and flannel sheets are designed for this purpose.
Another type of rubber sheet is known as the anchor band. This type of rubber sheet is very useful for children who sleep in a wild and unpredictable manner. The sheet is snuggly anchored to the bed helping to keep it from being removed from off of the mattress in the middle of the night.
Polyurethane covers make sleeping a breeze for children who have a tendency to wet themselves in the middle of the night. This cover has a terry-cloth top and a polyurethane middle. It provides comfort and moisture absorption just like a diaper.
So, a child can sleep underneath this type of cover during the night and if they happen to urinate in the bed; the cover will absorb the liquid keep them as dry as possible. Vinyl mattress covers are the next step up from the rubber variety but they are still the same thing. This type of mattress also offers protection from bed bugs and from dust.
Keep in mind that some rubber sheets are designed in the form of absorption pads that children can sleep directly. They also act like diapers and pull moisture away from a child’s skin. All of these different types of mattresses help to keep children dry in the middle of the night while they are sound asleep.