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The nozzle and flapper mechanism is a displacement type detector which converts mechanical movement into a pressure signal by covering the opening of a nozzle with a flat plate called the flapper. [1] This restricts fluid flow through the nozzle and generates a pressure signal.
A flapper is often part of the standard equipment on a fire engine and may also be set up inside and around forests and at heaths in order to take immediate action if a fire is seen. The flapper's technique has been developed from using a wet green pine bough, and wet burlap sacks in the rural south US, to swat the fire known as "wet sacking" a ...
A double check valve or double check assembly (DCA) is a backflow prevention device designed to protect water supplies from contamination. [1] It is different from the two-way check valves (sometimes erroneously referred to as double check valves) used in air brake systems on heavy trucks which select from the highest pressure source.
David Schwimmer was filming the young adult series Goosebumps: The Vanishing when he was reminded that he’s not a young adult himself. Chatting with PEOPLE for One Last Thing, the former Friends ...
The Christmas gas trend started in 2023 when a number of videos went viral, like Karsen Holloway Ward who garnered 2.9 million views when she tricked her dad into believing she bought "Christmas ...
A common stomach bug is surging, according to new data from the US Centers for Disease Control and Prevention.. In the week of December 5, there were 91 outbreaks of norovirus reported, up from 69 ...
Several films prior to Flaming Youth used the flapper as subject matter, such as The Flapper with Olive Thomas, but the financial success of Flaming Youth made it the movie credited with launching a cycle of movies about flappers and helping Colleen Moore be seen as the originator of the screen flapper. [5] [6]
If you’re a side-sleeper or if you have trouble sleeping on your back, adding a pillow between your legs and keeping your back straight can still help reduce shortness of breath from chest ...