Step to Sterling
placed on a surface and colour is laid on, a certain figure or design is made.
Step. (Aero.) A break in the form of the bottom of a float or hull designed to reduce resistance whe~ under way by rapidly reducing the wetted surfaces as speed increases. It also serves to. eliminate suction effects.
Step block or step bearing. (Mach.) A bearing which takes the end thrust of vertical shafts.
Step-up ring. (Auto.) A piston ring with the ends cut to a rabbet or haltlap joint.
Step-dOWD transformer. (Elee.) A transformer which changes the supply or line voltago to a lower value.
Stepping round. (Meeh. Draw.) Trial process by which an arc, curve, or circle is divided into a number of parts by use of steppers or dividers ; used in laying off a gear wheel.
Step tap. (M etalwk.) A tap with steps or sections of varying diameters to make easier the cutting of heavy internal threads. The end of the tap starts the thread, and each succeeding step removes more material.
Stereo. Sterephony or stereophonic, indicating three dimensional quality but in practice generally used to mean two-channel sound.
Stereo bus. In a mixing console, the bus or channel which is used to feed a programme to a stereo taperecorder, 2-channel soundsystem or other stereo equipment. (A stereo bus actually consists of two Buses, the left bus and the right bus.)
Stereogram. One-piece radiogram employing two channel for nominal stereo reproduction, with loudspeakers mounted at cabinet extremities. Not usually 'hi-fi'.
Stereo master. A 2-gang fader which simultaneously controls the overall level of the left and right outputs (i.e., the stereo bus output).
Stere ophonic. (Roo.) A technique of sound reproduction, whereby the sound eminating from two separated areas of origin is reporduced by a system having two separate units reproducing the corresponding tw~ originating sound areas. This method produces depth, richness, and added re8tity to the sound reproduced.
Stereo-type. (Print.) A cast plate of metal, made from a matrix of paper or plaster of Paris, reproducing the surface from which the mal{ix was made. .
Stereo-typing. (Print.) The process of duplicating, in solid metal, cuts and type composed for printing.
, There are three methods, of whi~h the paper-machine or hot process is most generally used. The ear
lier clay process and the plaster. process are now obsolete.
Sterling. (Jewlery) A standard of purity for silver. Sterling is 925/1000 parts fine silver with 75/1000 parts copper. The word "sterling" stamped on a piece of jewelry or
Stop down to Straight matter
a tapered opening, into which is fitted a plug 'of corresponding taper. By turning the plug through an arc of90 deg., the flow of water is turned on or off.
Stop down. Open up. To close down a lens; to adjust the iris/aperture of the lens so that less light passes through the lens. A set at f/2 which is adjusted to be set at r/4.5 is said to be stopped down two steps; to stop a lens all the way down is to set it at its highest f/stop number.
Stop leader. (Tel.) A length of motion-picture film used between portions of subject film when the projector is to be stopped between subjects.
Stopped miter. (Woodwkg.) A combination miter and butt joint; often' used when the pieces being joined are not of the same 'thickness.
Stop watch. A watch which can be started or stopped by pressure on the stem, used, in timing races, etc.
Storage battery. (Elec.) A combination of storage cells, each cell containing positive plates and negative plates, immersed in an electrolyte of dilute sulphuric acid.
Storage cell. (Elec.) One of the sections of a storage battery.
Storage life. (Plost.) Called also shelf life. The period of time during which a resin can be stored without loss of properties or of fluidity, depending upon a specified storage temperature.
Stored energy welding. A resistance welding process wherein the electrical energy required to produce the weld is accumulated in a suitable storage reservoir, usually at a low rate, prior to its delivery to the weld usually delivered at a high rate.
Storm doo. (Arch.) An extra outside door used in winter to avoid chilling the interior of a building and to lessen the effe<:ts of rain and wind at an entrance.
Storm sash. (Arch.) An extra or outer sash used as a protection from severe winter weather.
Storm signal. A visual signal, as a flag, giving advance notice of a heavy storm; used esp along coastal areas.
Stove bolt. When supplied without a nut it is called machine screw: with a nut it is a stove bolt. Stove bolts formerly had a coarser thread pitch than machine screws.
Straight chain. An open chain of atoms, usually carbon with no side chains at~ched to it.
Straddle milling. (Mach.) The use of two or more milling cutters, with spacers between, mounted on the same arbor to permit simultaneous finishing of opposite faces.
Straightedge. (Mech.) A parallel, straight strip of wood or metal used for gauging the linear accuracy of work.
Straight-eight engine. (Auto.) Has all cylinders vertical and in a straight line.
Straight fluted drill. (Metalwk.) SEE FARMER'S DRILL.
Straight matter. (Print.) Uniform type matter in which display lines are not used.
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