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Modern manual door closer Eclipse door spring and separate checking mechanism. A door closer is a mechanical device that regulates the speed and action of a door’s swing. [1] Manual closers store the force used to open the door in some type of spring and reuse it to close the door. Automatic types use electricity to regulate door swing behavior.
Some are built on top of a standard door closer. To open the door, the operator forces the closer in the opening direction. Then, the closer closes the door. The user may open the door manually, using just the door closer. In case of power failure while the door is open, the closer itself closes the door. Some are built without a door closer.
Caudill Rowlett Scott (CRS) was an architecture firm founded in Houston, Texas, the United States in 1946.In 1983, J.E. Sirrine, an industrial engineering firm, merged with the company and the company's name was changed to CRSS, popularly known as CRS-Sirrine.
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On March 20, 2011, a lap bar on the Hi-Miler roller coaster at the Houston Livestock Show and Rodeo suddenly unlocked, causing a 47-year-old male guest to fall more than 28 feet (8.5 m) from the roller coaster. The malfunction was caused by a single screw, which was supposed to keep the lock pin in place and the lap bar locked.
Water slides included Wipe-Out, Typhoon, Tidal Wave, and Hurricane, which offered twisting and turning rides as long as 400 ft (120 m) while patrons slid back down to earth. [134] Wipe-Out, in particular, had a vertical drop of 60 ft (18 m) over a straight 300 ft (91 m) length and claimed to accelerate riders to 40 mph (64 km/h).
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