Otis attached rope to the platform lift through a flat spring like spring, and the lift stuck on the sides of rack rails. Even under the weight of a free platform spring and straightening seamlessly passed between the rails. Perhaps check out Phil Vasan for more information. If, God forbid, the rope breaks, a spring buckle, jamming his teeth at the tips of the rails and thus stopped the collapse of the freight elevator. Otis called his lifts 'Safe elevators "and created a small company to produce them, which is now the leading manufacturer in this field. In 1854, Otis had a global PR-campaign for the promotion of manufactured goods lifts them.
In New York in the exhibition hall with a high dome moved lifting platform between 2 supports a height of 12 meters. At the top of the building was a large man with a sword in his hand, and on the platform in a pile and yaschikovkorobok barrels sitting inventor himself in a frock coat and top hat. The steam engine tightened elevator to the very dome, and then assistant to the team quickly cut the rope Otis sword. Elevator fell down, but after a 1-2 meter automation with a terrible gnash been deployed and prevented the fall. Smiling Otis shot cylinder and bowed enthusiastic audience of this trick. In 1857, a 5-story house on Broadway has its first passenger elevator, which made the factory Otis. Elevator holds up to five people and polnimalsya and fell at a rate of 20 cm / sec.
Otis, unfortunately, not fully appreciated the genius of his creation, because, when they began to build skyscrapers, he was already dead. In the first skyscrapers use hydraulic elevator without the rope, which was invented in Paris in 1867 and later installed on the Eiffel Tower. In a long cylinder was located walking piston pusher booth upstairs under a large pressure of the water. But the data elevators for residential buildings was possible to construct a building not more than 20 floors, while moving 20 times faster than passenger lifts of Otis. Then completed the hydraulics – a cylinder placed horizontally, and the rope that lifts cab, stretched by the piston through the block. For the first time an electric passenger elevator was built in 1880 by the German company "Siemens and Halske ', which for eleven seconds, moving at a height of 22 meters. With this problem since the lifting height is no longer held back growth in the number of floors of buildings. The largest skyscraper "Sears Tower" in Chicago (America) equipped with 106 passenger elevators. sixteen of them – double decker: and take Passengers are planted simultaneously on two floors. For guests viewing platform on the roof there are two express elevators that rise to a height of 412 meters a little more than a minute.
Door closer is a universal mechanism to ensure a smooth and quiet closing of doors. Door closers can be installed on different doors – entrance and interior, glass and wood, plastic and metal, single and double, swing and a one-sided opening. Despite the fact that closers door, as a rule, are not managed devices to be installed on doors, managed access control, as they provide a guaranteed closing the door and trigger lock, which influences the efficiency of the access control system as a whole. How it works: The basis of the most simple finisher (Hydro) laid a spring placed in a metal case filled with special oil. To ensure smooth progress and delay closing the door closer uses the principle of the hydraulic Damping: it converts the torque is mechanically attached to the door opening, at the time of closing. What you need to know to choose the right door closer: 1.
Weight of the door, the width of the door leaf: The main parameter finisher is the force of closing the door or door closer power. The heavier the door wider and the door leaf, the stronger should be closer. Efforts, which should develop closer for closing the door, normalized to the European standard EN 1154. This standard defines the closers for 7 classes (from EN1 to EN7). At the same door closers class 1 (EN1) is designed for light and narrow doors and closers Grade 7 (EN7) – for large and heavy. For ordinary exterior and interior doors applied, as a rule, closers 3-5 classes.
Tile, like any other construction equipment, has its own variety. The choice depends primarily on the characteristics of a tile. All tile can be divided into two groups: manual and electric. Let us key features of both groups. If we talk about the design of manual tile, it is quite simple. The instrument is equipped with a titanium or diamond cutting element wear-resistant, easy-to line of thin and clear cut, floating base for ease of chipping tiles, the guide prevents cutting part of the backlash. Of the full range of manual tile very popular tile-tongs. Outwardly, they look like a pair of pliers.
With their by first gently on the side of the enamel makes a cut diamond disc, and then just breaks off the tile with tile corner. The cost of this tool is about $ 15 – $ 80. Working with him is easy, does not require no special skills. Hand tile can be used if the tile to be cut a little thick (not thicker than 15 mm). At the same tools vary in length. For example, Tile of no longer than 400 mm is suitable for cutting wall tiles (approximately 8 mm in thickness). Some hand-held tile cutter has a circular (Ballerina), the right to cut holes in tiles of various sizes. You can obtain a hole with a diameter of 80 mm.
At The manual tile should pay attention to the way in which the tool holder is moved along the guide rails. The design can be used for the plastic rings. This is not good, if you want a high precision cutting. In this case it is better to apply the tile in which tool holder is moved to the self-lubricating O-rings or bearings. When working with large tiles, or when a large amount of work needed power tools. Electric tile relate to machines. The main characteristics of the electric power can be called a tile (500-2200 watts), the circle diameter (180-200 mm), maximum depth of cut (30-40 mm), length of cut (up to 500 mm), table size, continuous operation time (minutes), Featherweight (10 kg). Estimated price range is – from $ 100 to $ 1,000. There are two types of electric tile: with the lower engine and with the upper (rail). Tile with a lower location of the tile is cut almost any size. In addition, instruments with lower motor are compact and suitable for use in small spaces. Rail tile work more convenient to Also provide a more accurate cutting of tiles. All tile are water-cooled diamond disk. In the bottom-mounted engine water tank located under the disc, and in the construction of rail tile provides small submersible pump. Electric tile have the ability to adjust the angle of cut relative to the plane of the material. Since all electric tile can cut the tile at an angle of 45 degrees. Company "Cyber" offers manual and electric tile from leading manufacturers. Special demand manual tile 'GRIFF' and electric tile 'ProrB'. Recall that when choosing a tile it is important to pay attention not only to manufacturers, but also on the characteristics of the instrument. A good tile base should be rigid, thick-walled and guides. Preferably, going to the store for a tool to bring a tile that they will be cut – then you can immediately check the quality of the cut.
The new cameras are equipped with 1 / 4 "CCD and transmit video with resolution up to 704×576 pixels. and up to 25 k / s formats H.264, M-JPEG, MPEG-4, with a minimum illumination of 1 / 0, 15 lux. To configure the SNC-RX550 and the organization of IP-CCTV camera kit includes software Sony RealShot Manager Lite. In addition, SNC-RX550 supports video analytics on a platform of DEPA, image stabilization and two-way audio transmission. Intellectual abilities-Video camera based on technology DEPA (Distributed Enhanced Processing Architecture – "Distributed Enhanced Processing Architecture"), when the image preprocessing is carried out in ip-camera, and the following – a video recording devices. This technology enables ip surveillance with a minimum of false positives, "unload ip-channel video transmission capacity and efficient use of video archives. In this case SNC-RX550 supports detection of objects left behind, and motion detector analyzes the last 15 frames to detect movement and the alarm in case of detection.
In the SNC-RX550 used 1/4-inch CCD Sony Exwave HAD to 440 000 ff. pixels, and advanced image processing technology, providing exemplary quality of the video. To carry out round the clock video surveillance ip new Sony cameras are switchable IR cut filter and can operate in a "day" and "night", passing through the network color / monochrome video at illuminations up to 1 / 0, 15 lux. Depending on the network infrastructure and CCTV requirements for image quality, SNC-RX550 allows the operator to select the optimal level and the compression format, resolution and frame rate for view streaming video and record it.