Best advices for everyday life

Home Articles Languages

Education and Psychology

Education and Psychology the category in which you can find all about the care of children, ADHD in children, high conflict divorce and children, business intelligence, ethics in the workplace, distance learning, internet etiquette, communication training...


How does an elevator? | Education

How does an elevator? 200 years ago nobody could imagine that the Millions of people live and work in buildings that are so high that the man on foot can easily climb to the upper floors

200 years ago nobody could imagine that the Millions of people live and work in buildings that are so high that the man on foot can easily climb to the upper floors. Today we can not imagine the great skyscrapers in the city without elevators. Elevator or elevator was invented more than nearly two centuries. In the 19th century in New York had a hydraulic elevator. cab or platform was mounted on top of a long piston that is located in the cylinder. To ascend the elevator, the bottom cylinder that pumped water, and to an elevator descended, opened the taps to drain the water from the cylinder. This water is diverted back into the reservoir and could be reused as it was quite convenient.
Elevators of this type today mostly no longer in use. These elevators were slow, and since it raises the bar has to go the whole cabin vertically into the ground, such elevators can not be used in tall buildings because they require deep burials. One type of hydraulic elevator is still used in buildings of moderate height. In these elevators are raising the bar for not located under the platform, but the mechanism for raising the next hole for the elevator, with whom he associated through the pulleys by which raises the cabin. construction of tall buildings has become possible thanks to an electric elevator. Such elevator lifted by cables, which is wound around the drum at the top of the building. For the latest elevator drum is replaced by a simple pulley, which is directly driven by the engine. cable passes over a pulley attached to one end of the elevator and down the other end tied to his weight by using the elevator is in equilibrium . Modern elevators have many devices aimed at preventing accidents. One of these devices is the airbag at the bottom of the hole. When the elevator goes down, the platform all the more closed-section perpendicular to the hole as little air came out. result is the creation of air bag, or slowing the fall cabin. Another safety innovation consists of two steel balls separated during rotation, until you press the brake stops the elevator.

> How to tell someone that stinks
> How to cheat on the test sheet
> How to mark the thesis
> How to choose the best fit occupation
> How to choose a school bag to school
> How to be funny
> Where to buy cheap books
> What do you do when your child hates school? ?
> How to effectively teach
> semicolon
> How to prepare your child for first grade
> How to choose a school
> How to buy cheap school supplies
> How to get medication
> How to properly formulate their goals in life
> How do air conditioners
> What is distilled water?
> Russian basic expressions
> Free software for learning English
> How to Meditate? | Spirituality