Elevators with no doors 8/31/2015 • Dean Braun
Several decades ago when elevators ascended and descended at a slow pace, innovations had to be done to the current design to improve efficiency. The solution was the invention of elevators with no doors.
They are called paternosters. The idea is simple: hang multiple cabins on a cable, remove all doors and move the cabins with slow speed. That way people have the opportunity to jump on and off the cabin successfully. At the speed of 0.95 feet per second it did not seem like a challenge. Also, the new design solved the issue of spaciousness, allowing the door-less elevator to fit more passengers than the modern models.
These elevators were popular in England, but in the US they are hardly known . As a result of several tragic cases where children or elderly people did not have time to leave the elevator and their limbs got stuck, many companies began to avoid using paternosters. Some have survived to this day. For example, some Moscow administrative buildings use these "constantly moving" elevators and a 2015 survey showed that Germany has more than 200 registered and active paternosters.
9 surprising facts about the Earth 12/3/2016 • Johnny Crepaul
Our home planet, Earth, is truly beautiful and amazing. Here are 9 incredible facts about the third planet from the sun.
Is everything you know really true? Can you see the difference between the truth and a lie? If at least 4 of these facts surprise you, we strongly recommend you to be more attentive while learning something new. Let's start!
The role of first lady of the United States has changed and evolved over many years. There are a lot of impressive facts about US first ladies and their lives. Some of these women have really changed our history, so let's find out more about that.
Old Hollywood's favorite actresses are considered iconic for different reasons. Their amazing charisma and beauty captivated millions, their characters were fierce and independent. Let's remember the stunning ladies who really ruled the screen during the Golden Age of Hollywood.
The first glasses appeared in Italy at the beginning of the 13th century. Today we use glasses not only as a method of eye vision correction, but also as a fashion accessory. Let's find out more about glasses, their history and the way they work!