Crankcase to Crossover distortion.

Crankcase. (Atuo.) The lower part of an automobile engine which acts as a reservoir for the supply of lubricating oil.
Crankcase ventilator. (Auto.) Draft from the fan creates a suction which is used to carry offvapours formed in the crankcase thus avoiding a dilution of the oil which would otherwise result from water and gasoline vapours.
Crankshaft. (Mech. Engin.) The main shaft of an engine to which the connecting rods are attached, and which controls the throw of the pistons.
Crank shaper (Mach.) A shaper in which the ram is operated by a crank motion.
Crater of an arc. (Elec. )The hollowed­ out tip of the positive carbon in an , arc lamp produced by action of the current.
Crawling. (Paint and Lacquer) Adefect appearing during application in which the film breaks, separates, or raises, due to application over a slick or glassy surface or to surface tensions caused by heavy coatings, or use of an elastic film over a surface that is hard or brittle.
Crazing. ( Cerarn. ) Very fine cracks in the glaze on a piece of ware due to unequal shrinkage between the glaze and the body; often caused by improper firing. (Paint and Lacquer) Fine hairline checks that will sooner or later develop into deep cracks are the result ofcontraction or expansion of one coat in comparison with another, generally when a heavily, pigmented surfacer or enamel is '
applied over a more elastic coating. (Plust.) Fine cracks on the surface or inside a plastic product.
Creasing. (Print.) Cover stock or card­board which is too thick to be folded without breaking must be creased; the process is known as "creasing."
Credence. (Furn.) An antique buffet, or side table, used for carving meat or displaying plates.
Creeper. (Auto. Mech.) A low platform supported on small c~ters, on which J an auto repairman may lie while working under a car.
Creosote. (Chern.) A light-coloured, oily distillate of coal tar. Used as a dis­infectant andasa wood preservative.
Creosoting. The injecting of creosote into timber which is to be exposed to the weather, in order to increase its durability.
Creosoting cylinder. Strong wrought­

Crosscut saw. (Woodwkg.) A saw made for cutting wood across the grain. The action of its teeth is similar to that of a knife instead of a chisel as is the case of a ripsaw.
Cross-dyeing. (Textile) Dyeing mixed mateiral in a bath which col­ours only one kind of fiber.
Crossed belt. (Mech.) A driving belt which has a twist between the driv­ing and the driven pulleys causing a reversal of direction.
Crossfade. To fade out one video sig­nal and fade in another as a simul­taneous movement; can be written as X on taping scripts.
Cross-feed. (Mach.) A transverse feed. In a lathe, that which usually operates at right angles to the axis of the work. In a planer or shaper that feed which carries the tool across the work.
Cross-field bias. System of tape re­cording using separate head for ap­plication of HF bias. Extra head positioned in relation to record head so that its magnetic field has less demagnetising effect at high audio frequencies than in conven­tional arrangement using a com­mon head.
Crossed-pair. Two directional micophones arranged one above the other, or otherwise very close together, with axes diverging at ap­proximately 90 degrees. Used for stereo recording in the form of Bluamlein, Stereo recoding in the manner of Blumlein.

Cross grain. A section of wood taken at right angles, or at a low' angle, with the direction of the longitudinal fiber.
. Crosshatching. (Draw.) The represen­tation of different kinds of material by means oflines, usually drawn ob­liquely on a part which has been sec­tioned.
Crosshead. (Engin.) The connecting unit between connecting rod and pis­ton rod in a steam engine making possible the change from rotary to reciprocal motion. (Mech.) That por­tion of a pump or engine which con­nects the piston and connecting rod, permitting the reciprocal motion of the poiston rod.
Crossing file. (Mach.) A taper file with a section like two half rounds with flat faces back to back.
Crosslap. (W oodwk.) A crossed joint formed by halving both pieces at the place of joining in order that they will lie on the' same plane.
Cross member. (Auto.) A structural part of an automobile frame connect­ing the side rails, usually at right an­gles.
Crossover. (Plumb.) A fitting shaped like the letter U with the ends turned out. It is used to pass the flow of one pipe past another when the pipes are in the same plane.
Crossover distortion. Can arise in Class-B amplifier circuits due to dis­continuity as signal waveform swings across 'zero' line. Experi­enced at low rather than high out­ put levels.