Statistics to Steel casting
ation, as distinguished from a portable engine. .
Statistics. The Science of the arrangement of facts.
Stator. (Elec.) The fixed part in an a.c. motor or generator; that part which does not rotate.
Statoscope. (Aero.) An instrument for detecting slight change of altitude of an aircraft. .
Stay. (Aero.) A wire or other tension member, as the stays of the wing a-tid body trussing. (Bldg.) A prop or a guy for supporting canopies, steel chimneys, etc. A bar for holding parts together.
Stay bolt. (Engin.) A rod threaded at both ends; used to prevent bulging of the plates or parts through which it passes.
Stay-bolt tap. (Mach.) A type of combination reamer and tap used extensively in locomotive-boiler work.
Steady rest. (Mach.) A test attached to the ways of a lathe for supporting long, slender work .while it is being machined.
Steam. The gas into which water is converted by boiling.
Steam bronze. (Metal.) Used for making valves and fittings. It is an alloy of about 85 per cent copper, 5 per cent zinc, 5 per cent lead, and 5 per cent tin.
Steam hammer. A heavy hammer, moving between vertical guides, actuated by steam pressure.
Steam main. (Mech. Engin.) A hori. zontal pipe for carrying live steam from a boiler to radiators, a steam engine, or other steam.consuming device.
Steam table. (Print.) Table for drying the matrix used in stereotyping.
Steam turbine. (Engin.) A steam engine in'which the steam acts on a rotating turbine instead of on a piston.
Steel. (Metal.) A form of iron containing up to 1.7 per cent of carbon. It includes low carbon nontemperable steels, high carbon steels which can be tempered, any alIoy steels.
Steel alloys. (Engin.) Special steels for special purposes, in which certain ingredients are used, such as manganese for strength, nickel for strength and toughness, tungsten as a hardener and heat resister, chromium for resisting shocks, vanadium as a fatigue resister, etc. After being machined, alloy steel must be "heat treated" to bring it to its maxium strength.
Steel belL (Mach.) Thin, flat, steel belts varying from 0.008 to 0.035 in. in thickness and from 7/3 to 8 in. in width have been successfulIy used. The pulIeys should be faced with a thin layer of cork. Steel belts can be run at speeds as high as 10,000 feet per minute. It has been claimed that a 4-in. steel belt .will transmit as much power . as a 19-in. leather belt.
Steel casting. (Engin.) Castings made of steel, for machine parts which are subjected to shock or particularly rough usage in places where cast iron, owing to its granular
Steel converter to Stencil
structure, would not "stand up."
Steel converter. (Engin.) The retort, lined with refractory material, in which cast iron is converted into steel, as by the Bessemer process.
Steel-draulic brakes. (Auto. Mech.) A mechanical brake system by which the brake pedal' transmits effective braking force to the brake shoes by means of cables enclosed in protective armor, to each wheel.
Steel engraving. (Print.) (I) The act or art of cutting a design on a steel plate; (2) an eng!aved design on steel; (3) a picture printed from an engraved steel plate.
Steel girder. (Engin.)A built-up steel beam, receiving a vertical load and bearing vertically on its supports.
Steel pulley. (Mach.) Usual1y of the split type made of sheet steel. Light in weight and satisfactory in operation.
Steel rule. (Mech.,) A flexible or rigiQ measuring strip of steel. These rules are available in various lengths. They are graduated in inches and fractions of an inch.
Steel square. (Carp.) The ordinary steel try square used by machinists; also the large square used by carpenters.
Steel wool. (Shopwk.) Fine threads of steel matted together into a mass; used principally for polishing or i
cleaning surfaces of wood or metal.
Steelyard. A weighing device consisting of a long lever with two arms of unequal length. In use a sliding weight can be moved on the longer graduated arm to balance the object to the weight which is suspended from thashorter arm.
Steeple. (Arch.) A spire; a tall structure rising above the body of a building, as a church steeple.
Steeple jack. One who works on steeples, flagpoles, etc.
Steering column. (Auto.) The column or post on which is mounted tite steering wheel, connected to various members by which st~ring motion is carried to the front wheels.
Steering gear. (Auto. Mech.) A term applied, generally, to all that as
semblage of parts from steering, wheel to axle, by means of which' steering is accomplished.
Steering-knuckle arms. (Auto.) Two irregular-shaped forgings, one left and one right, attached to the steering knuckles in order to make connection with the steering mechanism.
Steering wheel. (Auto. Mech.) The hand wheelan an automobile, which through a system of gears and levers connecting it with the front wheels makes possible the steering control of the. car.
Stellite. (Engin.) A trade name for an alloy containing chromium and cobalt with a small amount of molybdenum or tungsten. Used for tools and cutters. Stellite can be cast but cannot be forged, or machined except by grinding.
Stencil. A thin plate of metal or other material, with letters or pattern cut out, used for marking. When
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