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2. Chimney - Wikipedia

   en.wikipedia.org/wiki/Chimney

   A chimney cowl or wind directional cap is a helmet-shaped chimney cap that rotates to align with the wind and prevent a downdraft of smoke and wind down the chimney. An H-style cap is a chimney top constructed from chimney pipes shaped like the letter H. It is an age-old method of regulating draft in situations where prevailing winds or ...

3. Chimney sweep - Wikipedia

   en.wikipedia.org/wiki/Chimney_sweep

   A chimney sweep in Wexford, Ireland in 1850. A chimney sweep is a person who inspects then clears soot and creosote from chimneys. The chimney uses the pressure difference caused by a hot column of gas to create a draught and draw air over the hot coals or wood enabling continued combustion. Chimneys may be straight or contain many changes of ...

4. Funnel - Wikipedia

   en.wikipedia.org/wiki/Funnel

   A flat funnel, [3] made of polypropylene, utilises living hinges and flexible walls to fold flat. The term "funnel" may refer to the chimney or smokestack on a steam locomotive and commonly refers to the same on a ship. The term funnel is also applied to other seemingly strange objects like a smoking pipe or a kitchen bin.

5. Cleaning rod - Wikipedia

   en.wikipedia.org/wiki/Cleaning_rod

   A cleaning rod is a firearm maintenance tool that can be used to clean the inside (bore) of a gun's barrel, and is made in different sizes for use on different barrel lengths, calibers and gauges. It is a sturdy, long, thin, straight rod typically made of metal, rigid plastic or carbon fiber , and usually has a handle at one end for gripping ...

6. Expansion joint - Wikipedia

   en.wikipedia.org/wiki/Expansion_joint

   Limit rods may be used in an expansion joint design to limit the axial compression or expansion. They allow the expansion joint to move over a range according to where the nut stops are placed along the rods. Limit rods are used to prevent bellows over-extension while restraining the full pressure thrust of the system.

7. Semi-flexible rod polymer - Wikipedia

   en.wikipedia.org/wiki/Semi-flexible_rod_polymer

   Semi-flexible rod polymers are a kind of organic polymer which may be converted to conductive polymers by appropriate oxidations or doping. Examples include polyaniline , poly(p-phenylene oxide) and poly(p-phenylene sulfide) .