Also, if you are tired of maintaining a place for your vacuum cleaner, hiding it somewhere so as not to block traffic passages, much more if your residence is not large enough to allow many things inside, you have a second thought of converting it to a better and more artistic area, with the good idea to think of covering your vacuum cleaner instead of setting it aside. These vacuum cleaners are also equipped with an infrared sensor that can indicate where to focus your cleaning effort in order to remove embedded dirt. There are also upright bag free vacuum cleaner models available for you that offer you more convenient cleaning duties. With its bagless cleaning operation, you do not have to buy dust bags before you can use this vacuum cleaner. Upon seeing the dust that adhered to the handkerchief, he realized that his idea had merit. Puffing Billy is a rather large device that needs to be transported. Suction is done by an internal combustion device that burns gasoline. Because of its size, his invention did not click. In 1905, Walter Griffiths patented a similar device that is smaller in size. Points to Consider when Using the Industrial Vacuum Cleaner: 1. Vacuum pressure - Refers to the stable flow in water lift, supposed to be static in nature. 2. Airflow - Something to do with the industrial vacuum motor device to produce the air stream flow velocity. 3. Filtration capabilities Types of Industrial Vacuum Cleaners: 1. Dirt carpets will not come along with just wiping, and that is what advantage bagless and conventional vacuum cleaners can do. By not spattering dusts around, vacuum cleaning helps in removal of harmful allergens and minute pollens existing in fabrics, especially in the carpets. It takes experience and comparison to know which vacuum cleaner works best to suite your needs. The basic idea is still there but due to the changing fashions, the development of science and advances in technology, vacuum cleaners have evolved to be a revolutionary invention that altered forever the way people clean. Today "Puffing Billy" would be put to shame by vacuum cleaners that are ten times smaller yet many times more powerful.