Elevator technology evolution and status of the country there has been a large number of small elevator factory, until 1999, there were more than 400 near the elevator manufacturer, with an annual output of nearly 30,000 sets of elevators. Elevator varieties developed from general freight elevator to the passenger elevator, advanced passenger elevators, escalators (including small height, medium height, a large degree of single, double escalators) and moving walkways, and other products. And since 1996, the price escalator, Tianjin, Shanghai and other elevator factory with a small amount of products sold abroad. Elevator manipulation mode from the handle to the button switch control signal to control the development and assembly election until more than one elevator group control elevator. The running speed of development from 0.25m / s to 2.5m / s or more, and has been replaced by AC variable speed drag comprehensive 4m / s or less DC speed drag. A brief history of the origin of the elevator and the elevator of origin l. Evolution Elevators structure is a modern multi-storey and high-rise buildings indispensable vertical transportation equipment. Early in the year 1100 BC, China's ancient Zhou Dynasty appeared carrying water with gin, which is a simple hoist by a wooden (or bamboo) bracket, rolls, consisting of a crank and ropes. 236 BC in ancient Greece, escalator brand, the famous scientist Archimedes made the first human-powered reel winches. These are the prototype of the elevator. After the year 1765, Watt invented the steam engine, the British in 1835 in a factory fitted with a flat dragged by a steam engine lift. In 1845, the British Armstrong made the first hydraulic lifts, escalators Youyang, which is the prototype of the modern hydraulic elevator. Since the early lifts were powered reel lifting, cotton rope tow, have broken rope fall accident occurred, resulting in the development of the elevator by a security test. In 1852, 41 year-old American Otis invented a safety gear, in the fall breaks, it will be locked on the rail car, to prevent the fall. From the old-fashioned elevator there was a major change. In 1854, the escalator brush, in New York, "Crystal Palace" exhibition, Otis personally performed a safety gear performance, he stood on the high lift platform, and then cut the sling in the audience exclaimed sound, the platform is securely clamp firmly bite, Mr. Adams Otis unscathed down the platform. Thus began, anti-fall safety elevator reliable guarantee. Youyang escalators, Gordon metal products, escalator safety brush provided by the Chongqing Municipal Gordon Metal Products Co., Ltd.. Youyang escalators, Gordon metal products, escalator safety brush in Chongqing Gordon Metal Products Co., Ltd. (www.cqgaodun.com) this year introduced a new upgrade, the above picture is for reference only, please call or pictures on this page contact telephone number, to obtain the latest information, contact: Deng Jianwei.