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The water ladder was built as an alternative to the paddle wheel to get around the problem that to lift water to a greater height, a bigger wheel is needed. [1] Despite the emergence of new pumps that operate on other principles, the water ladder remains an important tool as some of its other benefits are that they can be built and repaired easily at a very low cost.
The Combined Platform-Ladder (CPL) is a hydraulic ladder-platform truck which is used to conduct external firefighting and rescue operations involving high-rise buildings. There are several variants of CPL in SCDF, the largest being the CPL60 which can extend its platform ladder up to a maximum height of 60 metres, the equivalent of a 20-storey ...
A pump ladder from the London Fire Brigade pictured in 2021 A steam pump truck in use in 1913, St Helens enabling fire-fighters to reach the burning clock tower. The limber for attaching to a horse team is visible stretching to the right.
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A quintuple combination pumper or quint is a fire-fighting apparatus that serves the dual purpose of an engine and a ladder truck. “Quintuple” refers to the five functions that a quint provides: pump, water tank, fire hose, aerial device, and ground ladders. [1] Tillers and tractor-drawn aerials also have quint features, and are dubbed ...
The hydraulic escape ladder reached full height in 18–20 seconds. In an emergency, the ladder could be operated manually. There was a two-way loudspeaker telephone. The Coventry-Climax pump had a capacity of 350–500 g.p.m. The usual compartment behind the driver's cab seated a crew of four, and at the sides and rear of the platform were ...
Ladder notation is best suited to control problems where only binary variables are required and where interlocking and sequencing of binary is the primary control problem. Like all parallel programming languages , the sequential order of operations may be undefined or obscure; logic race conditions are possible which may produce unexpected results.
Person on the 1837 man engine at the Samson Pit in Lower Saxony, Germany Bottom of the man engine at the Dolcoath Mine, Cornwall. The earliest known examples of this device were from the first half of the nineteenth century in the silver mining area of the Harz mountains, Germany, where they were driven by cranks connected to water wheels, although bucket hoists ("Hakenkunst") using the same ...