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1869 Birdsill Holly fire-hydrant. Birdsill Holly Jr. (November 8, 1820 – April 27, 1894) was an American mechanical engineer and inventor of water hydraulics devices. He is known for inventing mechanical devices that improved city water systems and patented an improved fire hydrant that is similar to those used currently for firefighting.
H. Mueller, Gun Shop building, circa 1859. Mueller Co. was founded in 1857 by Hieronymus Mueller in Decatur, Illinois as "H. Mueller, Gun Shop". [3] Mueller closed the business briefly in 1858 to prospect for gold in Colorado, but returned to his business not long after, expanding it to include sewing machine and clock repairs and the sale of hunting and fishing equipment in addition to ...
A flushing hydrant is a hydrant that is used for flushing a water line of silt, rust, debris, or stagnant water. Many water utilities use standard fire hydrants for flushing their lines. Specialized flushing hydrants are often smaller and less expensive than a fire hydrant to reduce cost where fire fighting use is not needed or practical.
The user (most likely a fire department) attaches a hose to the fire hydrant, then opens a valve on the hydrant to provide a powerful flow of water, on the order of 350 kilopascals (51 psi); this pressure varies according to region and depends on various factors (including the size and location of the attached water main).
Big tricoise wrenches are placed in fire trucks, and are mainly used to fasten the big hoses, e.g. ∅110 mm hoses to feed the pumper tank from the hydrant (∅100 mm for the clutch). Small tricoise are made of brass and hang at the fire belts; they are used to fasten the small hoses, e.g., ∅70mm to ∅22mm hoses (∅65mm to ∅20mm clutches).
Blakey was able to fire two rounds in 1.5 seconds and Cornwell fired two rounds in 1.2 seconds. This was an experiment to test a possible theory that Oswald in his excitement may have pointed and fired, as opposed to aimed and fired. Some critics of the Warren Commission had claimed it was impossible to fire a Carcano rifle in less than 2.3 ...
Manual fire alarm activation requires human intervention, as distinct from automatic fire alarm activation such as that provided through the use of heat detectors and smoke detectors. It is, however, possible for call points/pull stations to be used in conjunction with automatic detection as part of the overall fire detection and alarm system .
Frame 150 from the Zapruder film. Kennedy's limousine has just turned onto Elm Street, moments before the first shot. The Zapruder film is a silent 8mm color motion picture sequence shot by Abraham Zapruder with a Bell & Howell home-movie camera, as United States President John F. Kennedy's motorcade passed through Dealey Plaza in Dallas, Texas, on November 22, 1963.