Steam, From Websters Dictionary, 1902.
STEAM (steem) -- n. [OE. stem steem, vapor, flame, as steam vapor, smoke, odor; akin to D. stoom steam, perhaps originally a pillar, or something rising like a pillar. 1. The elastic aeriform fluid into which water is converted when heated to the boiling point. Water in the state of vapor. 2. The mist formed by condensed vapor; visible vapor -- so called in popular usage. 3. Any exhalation, a steam of rich distilled perfumes. Milton.
Dry Steam; Steam which does not contain water held in suspension mechanically; sometimes applied to super-heated steam.
High Steam or High Pressure Steam; steam of which the pressure greatly exceeds that of the atmosphere.
Low steam or Low PressureSteam, steam of which the pressure is less than, equal to, or not greatly above, that of the atmosphere.
Saturated Steam, steam at the temperature of the boiling point which corresponds to its pressure. Sometimes also applied to wet steam.
Super Heated Steam: Steam heated to a temperature higher than the boiling point corresponding to its pressure. It cannot exist in contact with water, nor contain water, and resembles a perfect gas. Called also surcharged steam, anhydrous steam, and steam gas.
Wet Steam: steam which contains water held in suspension mechanically; called also misty steam.
Steam is also used adjectively and in combination, to denote PRODUCED BY HEAT, or OPERATED BY POWER, or DERIVED FROM STEAM, in distinction from other sources of power. As in Steam Boiler, Steam Dredger, Steam Engine, Steam Heat, and so forth.
Steam Blower: a blower for producing a draught consisting of a jet or jets of steam in a chimney or under a fire. (b) a fan blower driven directly by a steam engine.
Steam Boiler: a boiler for producing steam. In the illustration the shell a) of the boiler is partly in section, showing the tubes, or flues, which the hot gases from the fires beneath the boiler enter, after traversing the outside of the shell, and through which the gases are led to the smoke pipe d), which delivers them to the chimney; b) is the manhole; c) the dome; e) the steam pipe; f) the feed and blow-off pipe; g the safety valve; h) the water gauge.
Steam Car: a car driven by steam power, or drawn by a locomotive. Steam Carriage: A carriage on common wheels moved on common roads by steam.
Steam Casing -- Steam Jacket -- Insulation or reinforcing material or both.
Steam Chest: The box or chamber from which steam is distributed to the cylinder of a steam engine, steam pump, etc; and which usually contains one or more valves; called also valve chest and valve box.
Steam Chimney: an annular chamber around the chimney of a boiler furnace, for drying steam.
Steam Coil: a coil of pipe, or a collection of connected pipes, for containing steam; used for heating, drying etc.
Steam Cylinder: The cyclinder of a steam engine, which contains the piston.
Steam Dome (Steam Boilers) a chamber upon the top of the boiler from which steam is conducted to the engine. See the illustration of the Steam Boiler.
Steam Fire Engine: A fire engine consisting of a steam boiler and engine, and pump which is driven by the engine combined and mounted on wheels. It is usually horse-drawn, but is also made self-propelling.
Steam Fitter: A fitter of Steam Pipes and Steam Fittings.
Steam Gauge: An instrument for indicating the pressure within a steam boiler. The Mercurial Steam Gauge is a bent tube partially filled with mercury, one end of which is connected to the boiler, while the other is open to the air so that the steam by its pressure raises the mercury in the long limb of the tube to a height proportioned to that pressure. A more common form, especially for high pressures, consists of a spring pressed upon by the steam, and connected with the pointer of a dial. The spring may be a flattened, bent tube, closed at one end, which the entering steam tends to straighten, or it may be a diaphram of elastic metal, or a mass of confined air, etc.
Steam Gun: a machine or contrivance from which projectiles may be thrown by the elastic force of the steam.
Steam Hammer: a hammer for forging which is worked directly by steam. Especially a hammer which is guided vertically and operated by a vertical steam cylinder located directly over an anvil. In the variety known as Nysmyths, the cylinder is fixed, and the hammer is attached to the piston rod. In that known as Condies, the piston is fixed, and the hammer attached to the lower end of the cylinder.
Steam Pump: a small pumping engine operated by steam. It is usually direct acting.
Steam Trap: A self acting device by means of which water that accumulates in a piper or vessel containg steam will be discharged without letting steam escape.
Steam Whistle: an apparatus attached to a steam boiler, as of a locomotive, through which steam is rapidaly discharged, producing a very loud whistle serving as a warning or signal. The steam issues for a narrow annular orifice around the uppe redge of the lower cup, or hemisphere, striking the thin edge of the bell above it, and producing sound in the manner of an organ pipe or a common whistle.
Steam Engine: An engine moved by steam. In its most common forms its essential parts are a piston, a cylinder, and a valve gear. The Piston works in the cylinder to which steam is admitted by the action of the valve gear, and communicates motion to the machinery to be actuated. Steam Engines are thus clssified: 1) according to the way the steam is used or applied, as CONDENSING, NON-CONDENSING, COMPOUND, DOUBLE ACTING, SINGLE ACTING, TRIPLE EXPANSION, etc. 2) according to the motion of the piston, as RECIPROCATING, ROTARY, etc. 3) according to the motion imparted by the engine ie. ROTATIVE OR NONROTATIVE. 4) According to the arrangement of the engine, as STATIONARY PORTABLE OR SEMI-PORTABLE engines, HORIZONTAL or VERTICAL engines, BEAM engines, OSCILLATING engines, DIRECT ACTING, or BACK ACTING engines, etc. 5) According to their uses, as PORTABLE, MARINE, LOCOMOTIVE, PUMPING, BLOWING, WINDING, and STATIONARY engines, the latter term referring to factory engines, etc., and not technically to pumping or blowing engines. Locomotive and portable engines are usually high pressure noncondensing, rotative, and direct acting.
Marine Engines are high or low pressure, rotative and generally condensing, double acting, and compound.
Paddle engines are generally beam, side lever, oscillating, or direct acting.
Screw Engines are generally direct acting, back acting, or oscillating.
Stationary engines belong to various classes but are generally rotative. A horizontal or inclined stationary steam engine is called a left hand or right hand engine when the crank shaft and driving pulley are on the left hand side, or the right hand side, respectively, of the engine, to a person looking at them from the cylinder, and the engine is said to run forward or backward when the crank traverses, the upward half, or lower half, respectively, of its path, while the piston rod makes its stroke outward from the from the cylinder.
A marine engine, or the engine of a locomotive, is said to run forward when its motion is such as would propel the vessel or locomotive forward.
Steam engines are further classified as double cylinder, disc, semi-cylinder, trunk engines, etc.. nachines such as cranes, hammers, etc, of which the steam engine forms a part, are called steam cranes, steam hammers, etc.
Back-acting or back-action steam engine: a stema engine in which the motion is transmitted backward from the cross head to a crank which is between the cross head and the cylinder.
Portable Steam Engine: A steam engine combined with, and attached to, a boiler which is mounted on wheels so as to admit of easy transportation, used for driving machinery in the field, as thrashing machines, draining pumps etc.
Semi-portable Steam Engine: A steam engine combined with, and attached to, a boiler, which is not mounted on wheels.
email me: luxefaire@gmail.com
Click the Gutenberg Banner Above and go to THE CATECHISM OF THE STEAM ENGINE by John Bourne.
Click Here to see a picture illustrating some carpentry, joinery, and masonry.
Click here to see a real cool drawing of a gigantic steam engine used on steamboats.
Visit:
This site hosted by WWW.COMPWEBTECH.COM
For the best deal in internet hosting and much more write to Larry at larry @ compwebtech.com.