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Brace :: Brace (n.) A piece of material used to transmit, or change the direction of, weight or pressure; any one of the pieces, in a frame or truss, which divide the structure into triangular parts. It may act as a tie, or as a strut, and serves to prevent distortion of the structure, and transverse strains in its members. A boiler brace is a diagonal stay, connecting the head with the shell..

Collapse :: Collapse (v. i.) To fall together suddenly, as the sides of a hollow vessel; to close by falling or shrinking together; to have the sides or parts of (a thing) fall in together, or be crushed in together; as, a flue in the boiler of a steam engine sometimes collapses..

Flue :: Flue (n.) A pipe or passage for conveying flame and hot gases through surrounding water in a boiler; -- distinguished from a tube which holds water and is surrounded by fire. Small flues are called fire tubes or simply tubes.

Feed :: Feed (n.) The water supplied to steam boilers.

Leg :: Leg (n.) An extension of the boiler downward, in the form of a narrow space between vertical plates, sometimes nearly surrounding the furnace and ash pit, and serving to support the boiler; -- called also water leg..

Expansion :: Expansion (n.) The operation of steam in a cylinder after its communication with the boiler has been cut off, by which it continues to exert pressure upon the moving piston..

Mason :: Mason (v. t.) To build stonework or brickwork about, under, in, over, etc.; to construct by masons; -- with a prepositional suffix; as, to mason up a well or terrace; to mason in a kettle or boiler..

Copper :: Copper (n.) the boilers in the galley for cooking; as, a ship's coppers..

Stagger :: Stagger (v. t.) To arrange (a series of parts) on each side of a median line alternately, as the spokes of a wheel or the rivets of a boiler seam..

Boiler :: Boiler (n.) One who boils.

Priming :: Priming (n.) The carrying over of water, with the steam, from the boiler, as into the cylinder..

Scale :: Scale (v. t.) To strip or clear of scale or scales; as, to scale a fish; to scale the inside of a boiler..

Purge :: Purge (v. t.) To clear of sediment, as a boiler, or of air, as a steam pipe, by driving off or permitting escape..

Lacashire Boiler :: Lacashire boiler () A steam boiler having two flues which contain the furnaces and extend through the boiler from end to end.

Digest :: Digest (v. t.) To soften by heat and moisture; to expose to a gentle heat in a boiler or matrass, as a preparation for chemical operations..

Injector :: Injector (n.) A contrivance for forcing feed water into a steam boiler by the direct action of the steam upon the water. The water is driven into the boiler by the impulse of a jet of the steam which becomes condensed as soon as it strikes the stream of cold water it impels; -- also called Giffard's injector, from the inventor..

Scale :: Scale (n.) An incrustation deposit on the inside of a vessel in which water is heated, as a steam boiler..

Prime :: Prime (v. i.) To work so that foaming occurs from too violent ebullition, which causes water to become mixed with, and be carried along with, the steam that is formed; -- said of a steam boiler..

Nozzle :: Nozzle (n.) A short outlet, or inlet, pipe projecting from the end or side of a hollow vessel, as a steam-engine cylinder or a steam boiler..

Tube :: Tube (n.) A small pipe forming part of the boiler, containing water and surrounded by flame or hot gases, or else surrounded by water and forming a flue for the gases to pass through..

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