Search the Dictionary

or bed, or kind of basket, of iron bars, for holding fuel while burning. Grate surface (Steam, Boiler) the area of the surface of the grate upon which the fuel lies in the furnace.

A football field. Gridiron pendulum. See under Pendulum. -- Gridiron valve (Steam Engine), a slide valve with several parallel perforations corresponding to openings in the seat on which the valve moves.

An extension of the deck of a vessel beyond the hull; esp., in side-wheel steam vessels, the framework of strong timbers, which curves out on each side beyond the paddle wheel, and protects it and the shaft against collision.

formations, marches, and alignments in tactics. Farrow. Guide bar (Mach.), the part of a steam engine on which the crosshead slides, and by which the motion of the piston rod is kept parallel to the cylinder, being a substitute for the parallel motion; -- called also guide, and slide bar. -- Guide block (Steam Engine)…

el sails or where she is registered; hence, to sail; to come; -- used with from; as, the steamer hails from New York.

To turn to the near side, or toward the driver; -- said of cattle or a team: a word used by teamsters in guiding their teams, and most frequently in the imperative. See Gee. To haw and gee, or To haw and gee about, to go from one thing to another without good reason; to have no settled purpose; to be irresolute or unst…

ich covers and closes the top or the end of a hollow vessel; as, the head of a cask or a steam boiler.

fluid, is made to perform work by giving motion to mechanism, as a hot-air engine, or a steam engine. -- Heat producers. (Physiol.) See under Food. -- Heat rays, a term formerly applied to the rays near the red end of the spectrum, whether within or beyond the visible spectrum. -- Heat weight (Mech.), the product o…

t; exciting action; stimulating; as, heating medicines or applications. Heating surface (Steam Boilers), the aggregate surface exposed to fire or to the heated products of combustion, esp. of all the plates or sheets that are exposed to water on their opposite surfaces; -- called also fire surface.

sovereignty, usually distant three miles or more from the coast line. Wharton. -- High steam, steam having a high pressure. -- High steward, the chief steward. -- High tea, tea with meats and extra relishes. -- High tide, the greatest flow of the tide; high water. -- High time. (a) Quite time; full time for the o…

Having or involving a pressure greatly exceeding that of the atmosphere; -- said of steam, air, water, etc., and of steam, air, or hydraulic engines, water wheels, etc.

The noise made by steam escaping through a narrow orifice, or by water falling on a hot stove.

Stop! stand still! hold! -- a word now used by teamsters, but formerly to order the cessation of anything. [Written also whoa, and, formerly, hoo.] The duke . . . pulled out his sword and cried "Hoo!" Chaucer. An herald on a scaffold made an hoo. Chaucer.

ncrease the longitudinal strength and stiffness. Used chiefly in American river and lake steamers. Called also hogging frame, and hogback.

my flying sails. Pope. Hoisting him into his father's throne. South. Hoisting engine, a steam engine for operating a hoist.

oks at the end by which it can be suspended, as from the top of a wall. -- Hook motion (Steam Engin.), a valve gear which is reversed by V hooks. -- Hook squid, any squid which has the arms furnished with hooks, instead of suckers, as in the genera Enoploteuthis and Onychteuthis. -- Hook wrench, a wrench or spanner,…

the power required to drive machinery, and in estimating the capabilities of animals or steam engines and other prime movers for doing work. It is the power required for the performance of work at the rate of 33,000 English units of work per minute; hence, it is the power that must be exerted in lifting 33,000 pounds…

orse; -- said of certain vehicles in which horse power has been replaced by electricity, steam, etc.; as, a horseless carriage or truck.

in, or produced by, the evolution of electricity by means of a battery in which water or steam is used. Hydro-electric machine (Physics), an apparatus invented by Sir William Armstrong of England for generating electricity by the escape of high-pressure steam from a series of jets connected with a strong boiler, in whi…

A contrivance or apparatus to prevent the explosion of steam boilers.