Split flap to Spring

Split flap to Spoon stake

In this type of generator the current-limiting features of the third brush are retained.
Split flap. (Aero.) A hinged plate forming the rear upper or lower portion of an airfoil.
Split nut. (Mach.) A nut split length­wise to permit sliding over a screw for quick movement. Final adjust­ment is made by turning in the usual manner. Often used on spring calipers.
Split phase. (Elec.) Causing currents to differ in phase in several cir­cuits connected to the same single­phase e.mJ.
Split-phase motor. (Elec.) A single phase motor which is made self­starting by causing the current to lead or lag in one of its windings with respect to the other winding.
Split pulley. (Mach.) A pulley made in halves and bolted together.
Split ring. (Mach.) A piston ring.
Split-ring mold. (Plast.) A mold in which a split cavity block is as­sembled in a chase to permit the forming of undercuts in a molded piece. These parts are ejected from the mold and then separated from the piece.
Split S. (Aero.) A maneuver consist­ing of a half snap roll followed by a pullout to normal flight, thus obtaining a 180 deg. change in direction accompanied by a loss of altitude.
Split-skirt piston. (Auto.) A piston with longitudinal slit in the sidewall to allow for expansion with­out binding.

Spliting. (Paint and Lacquer) Too much or too hard sanding fractures the old lacquer film, and when the solvents of the new lacquer penetrate into the old lacquer, these sanding scratches are opened up, ressulting in what is generally termed as splitting.
Spoiler. (Aero.) A small plate arranged to project above the upper surface of a wing to disturb the smooth air flow, with consequent loss of lift and increase of drag (interceptor).
Spoke. (Mech.) One of the arms of a wheel connecting the hub with the nm.
Spokeshave. (Woodwkg.) A kind of double-handled plane for dress­ing curved woodwork.
Sponginess. (Fdry.) Sponginess in a casting is due to the formation of gas bubbles in the iron at tl}e in­stant of solidification.
Sponginess oCcasting. (Fdry.) Caused by gas bubbles forming in the casting at the time of solidi­fication. Likely to occur in cast­ings in which some parts are very thin and others very thick.
Sponson. (Aero.) A protuberance from a seaplane hull designed to in­crease the beam or give lateral sta­bility at rest.
Spontaneous combustion. The igni­tion or combustion of a substance by heat generated within itself.
Spoon bit. A boring bit with a cres­cent-shaped section with sharp edges. Used for drilling holes in paper, cardbaord, etc.
Spoon stake. (A rt Met.) A small stakeSport roadster to Spring leafused in forming spoons, ladles, etc., by hand.
Sport roadster. (Auto.) Similar to roadster except rear deck is pro­vided with a rumble seat 'instead of luggage space.
Spot. (Tel.) The light producded by the beam of electrons on the fluo­rescent screen of the cathode-ray picture tube as the beam scans a line or an image from left to right.
Spot face. (Mach.) To finsih a round spot on a surface, usually around a drilled hole, to give a good bear­ing for a screw or bolt head.
Spoting the center. (Mach.) Spotting work with a center punch, then starting a hole with a much smaller drill than the one with which the hole is to be finished..
Spotting tool. (Mach.) Also called "centering and facing tool." Used to "spot" a center and to face the end of stock.
Spotting tip. (Print.) The marking out and patching of a make-ready sheet.
Spot welding. A resistance-welding process wherein coalescence is produced by the heat obtained from resistance to the flow of elec­tric current through the work parts held together under pressure by electrodes. The size and shape of the individually formed welds are limited primarily by the size and contour of the electrodes.
Spout. (Fdry.) The projecting trough through which metal flows from the .cupola to the ladle.
Spraying liquid. (Auto. Trade) A gen­eral term applied to those liquids or finishes that can be atomized readily, including oils, cleaning liquids, paints, and other finishes.
Spread. (Plast.) Amount of adhesive or a plastic, in pounds per square feet, required for area coverage.
Sprig. (Woodwkg.) A small, headless wire nail or brad.
Spring balance. A weighing device consisting of a calibrated tension spring contained i~ a casing. As the spring is extended, weight is indicated by a pointer on a gradu­ated scale.
Spring chuck or spring collet. (Mach.) A type of chuck used on screw machines. It consists of a sleeve slotted through a portion of its length, and is closed on the
. work by being drawn or pressed into a conical cap into which it fits. When releasd, it springs open sufficiently to free the stock.
Spring clip. (Auto.) A U:shaped bolt used for securing the spring to the axle. Two clips are used for clamp­ing each spring.
Spring cotter. (Mech.) Same as split cotter.
Springer. (Arch.) The stone from which an arch springs.
Spring hangers. (Auto.) Those rack­ets or fixtures attached to an au­tomobile frame to which the springs are connected.
Spring hinge. (Bldg.) A hinge with a spring built into it. Used for self­closing of screen doors. etc.
Spring leaf. (Meclz.) One of the flat members of a built-up spring as