Image orth to Indenture

Image orth to Impression screws

electronically on the face of the picture tube
image-orth. (Tel.) (Abbreviation of image-orthicon) A supersensitive camera tube developed. by RCA capable of picking up scenes in semi-darkness.
Imaginary number. (Math.) Quantity or value that involves the s'luare root of a negative quantitiy and is unreal.
Imitation embossing. (Print.) A method of securing a raised printed surface. Powder is dusted over a freshly printed sheet; application of heat causes the powder to fuse and adhere to the inked portions.
Immelman turn. (normal) (Aero.) A maneuver made by completing the first half of a normal loop; from the inverted position at the top of the loop, half-rolling the airplane to the level position, thus obtaining a 180­deg. change in direction simultane­ously with a gain in altitude.
Immerse. To submerge, plunge, sink, or dip entirely, as under water.
Immobile. Immovable; fixed in posi­tion. Impact. Collision.
Impact strength. (Plast.) Ability of plastics or other material to resist fracture when a sudden load at a test point strikes it!
Impact test (Engin.) The testing of materials for resistance to shock.
Impair. To lessen in quantity or quality; to deteriorate.
Impedance (Elec.) The total opposi­tion in an electric current to the
flow of an alternating current. The combined resultrs of the ressistance and inductive and capacitive reactances ina circuit,it is measured in ohms.
impeller. (Auto.) The rotating mem­ber in a pump, usually consisting of a number of vanes, which puts in motion the medium through which it travels.
Imperial. A drawing paper of ordi­nary quality sold in sheet 30 by 22 in., made either rough or smooth.
Imperviousness. (Masonry) Is obtained by laying up a waIl with paving brick; using cement or cement-lime mortar. These bricks should always be dry when laid.
Impetus. Momentum; the force with which any body is driven or im­peIled.
Impinge. To come into physical con­tact with an object after motion. To strike.
Imposing stone. (Print.) The stone or metal-topped table on which forms are imposed and locked up.
Imposition. (Print.) The operation of arranging pages of type pre­paratory to printing.
Impost. (Arch.) The top member of a pillar on which the arch rests.
futpregnated. Timber for outdoor use is impregnated with various fluids to enable it the better to resist the decomposing influences of the atmosphere.
Impression. (Print.) The imprint of type or illustrations on a page or sheet.
Impression screws. (Print.) Screws by which the position of the platen

Imprint to Indenture

on a platen press is regulated.
Imprint. (Print.) The name of the printer placed on a piece of printing to show by whom the printing was done.
Impulse. (Auto. Meeh.) As applied to impulse starter or in pulse fuel pump, it refers to momentary acceleration given to speed of engine, shaft, or armature to produce starting,increase of vacuun~, or advance of timing position. Applied to auto engine and aviation engine.
Inboard stabilizing float. (Aero.) A stabilizing float placed relatively close to the main float or hull.
Incandescence. Glowing due to heat. Incandescent. That which gives light or glows at a white heat.
Incandescent lamp, (Elee.) Electric bulb containing a thin wire or fila­ment of infusible conducting mate­rial.
Incarnadine. Shades of colour from red to flesh.
Incinerator. (Arch.) A container in which. rubbish is burned.
Incise. (Arch.) To carve; cut in engrave. Incised work. (Furn.) Carved work. Inclination. The slope or slant with regard to the horizontal or vertical.
Inclined plane. A plane which is in­clined to the plane of the horizon, the angle which it makes being its inclination.
!!!~!i!!QJl1eter. (Auto.) An instrument for indicating the altitude of an air­craft. Inclinometers are termed rorce~and-aft, lateral, or universal, according as they indicate inclina­tion on the vertical plane through the fore-and-aft axis, or in the ver­tical plane through the lateral axis, or in both planes respectively.
Increaser. (Meeh.) Any device that increases the size, strength, etc., of something else. (Plumb.) A cou­pling with one end larger than the other.
Increment. The amount which a varying quantity increases between two of its stages.
Incrust. (Furn.) To lay a hard sur­face of ornamental material over a main surface; a' sort of veneering process.
Incrustation. (Engin.) The forming of scale on the interior portil)ns of steam boilers.
Indefinite. Not precise; unsettled; uncertain.
Indent. (Prillt) The space in front of a line to. give it a "set in."
Indentation. (Furn.)A zigzag mold­ing
Indention. (Print.) The amount of "setback" of a line of printing be­yond the other lines which fol­low, as the first line of a para­graph. If the first line projects beyond the other lines, it is called "hanging indention."
Indenture. (1) A legal instrument for binding an apprentice to an em­ployer. (2) A deed, mortgage. or lease. The name indenture comes from the fact that such documents were formerly made in duplicate on one piece of parchment which was cut in half in an irregular or indented manner for the purpose of indentification.