Vault to Vertical

Vault to Vent
motor in which the speed varies with the load, ordinarily decreasing as the load incr~es. Note: This is not the same as an adjustable speed motor..
Vault. (Arch.) An arched ceiling or roof; a laterally conjoined series of arches; a room or space covered by a vault.
V belt. A belt with a V section for use on grooved pulleys. Such belts have less tendency to slip or to leav~ the pulley than do flat belts.
V ~Iocks. (Mach.) Metal blocks cut V shaped on one side to permit hold­ing cylindrical work while machin­ing or testing.
VCF (Voltage Contro Ued Filter.). A VCF is an audio filter whose cutoff frequency andlor "Q" can be changed by means of external con­trol vol tags. VCF's are commonly found in synthesisers.
V.C.I. Voice-Coil Impedance (of LS). VCO(Voltage ControUed Oscilla­ tor). A VCO is an oscillator whose frequency can be changed by means of external control voltage. VCO's are commonly found in synthesisers.
VDU. Visual Display Unit. The screen for a computer.
Vector. (Elec.) Graphic representation of the component parts which act together in an alternating circuit.
Vee radiator. (Auto.) A type of radia­tor made in two sections joined at the middle at an angle less than 180 deg.
Vegetable tannage. (Leather.) Tan­ning leather by the use of vegeta­ble substances containing tannic acid.
Vehicle. (Chem.) A liquid medium by which a varnish or lacquer is applied.
VeUum. (Papermkg.) Paper made in imitation of parchment.
Velocity. (Mech.) It is distance di­vided by time, and is expressed in feet per second or per minute. (Phys.) The rate of movement of a body.
Velocity pickup. Phono cartridge with output voltage proportional to rate of alternating stylus mo­tion-hence velocity. Usually em­ . ploys magnetic type of transducer. Must be used with equalisation for recording characteristic.
Velox paper. (Photography) A trade name for a certain type of photo­graphic paper.
Veneer. (Arch. and Wood Fin.) A thinlayer of wood or other mate­rial placed on a commoner surface to secure a superior effect or to reduce cost.
Veneer press. (Woodwk.) A large heavy-duty press for gluing up plywood or panels.
Ve-neersaw. (Woodwk.) A special type of circular saw used for cut­ting veneers.
Venetian blind. (Arch.) A type of window shade consisting of a series' of slots held together by tapes and adjustable by means of pull cords.
Venetian red. (Paint.) (FePJ) A very brilliant, red pigment made by heating ferrous sulphate in the presence of lime.
Vent. (Fdry.) A small hole made in a foundry mold to permit the es­

Ventilation to Vertical flash ring

cape of gases.
Ventilation. (Bldg.) The act or method of supplying with fresh air.
Ventilator. (Bldg.) A device for pro­viding fresh air to a room or other space by (a) introducing outside air, (b) exhausting foul air.
Venting. (Fdry.) The making of a chan­nel or vent in a mold for the escape of air, steam, and gas.
Vent pipe. (Arch.) Any small ventilat­ing pipe running from various plumbing fixtures to the vent stack.
Vent stack. (Arch.) The vertical pipe connecting with the vent pipes and extending through the roof. It car­ries off gasses, and aids in main­taining a water seal in the trap.
Venturi tube. (Aero.) A short tube with flaring ends and a narrow or con­stricted section between them, into which a side tube opens. When fluid flows through the Venturi, there is a reduction of pressure in the con­stricted section, the amount of the reduction being a function of the velocity of flow.
Vent wire. (Fdry.) To provide for the escape of steam and gas, vents are made with a wire before the pattern is removed from the mold.
Veranda. (Arch.) An open portico extending along the outside of a building.
Verdigris. (Chern.) The oxidation on the surface of copper. Verdigris is also formed by treating copper with acetic acid. Used principally as a pigment and in dyeing.
Verge. (Arch.) The edge of the tiling, slate, or shingles projecting over the gable of a roof.
Verge boards. (Arch.) Boards sus­pended from the verge of a gable. During the last quarter of the nine­teenth century, verge boards were made of highly ornate scroll-saw work.
Vermiculated. (Arch.) Stones, etc., worked so as to have the appear­ance of having been eaten into by worms.
Vermilion. (Paint.) This red pigment is used in enormous quantities. It is usually made from mercuric sul­phide (HgS), tinted with purani­traniline.
Vernier. (Mech.) A small movable auxiliary scale for obtaining frac­ tional parts of the subdivisions of a fixed scale. The complete instru­ment.
Vernier depth gauge. (Mach.) A rod type gauge fitted with a vernier and used for checking narrow re­cessed portions, and shoulders or . steps of a machine part. Vertical. Plumb, perpendicular, up­ right.
Vertical boring min. (Mach.) A ma­chine tool, with revolving table which carries the work, and the slide arrangement which permits both vertical and horizontal feed of the tool. It is especially adapted to a class of work that cannot be easily "set up" on as lathe.
Vertical centering. (Tel.) The con­trol which regulates the position of the picture vertically on the screen of the receiver tube.
Vertical flash ring. (Plast.) The cIear­