vertical lathe to Vinyl.

vertical lathe to video cassete
ance between the force plug and the vertical wall of the cavity in a posi­tive or semipositive mold; also the ring of excess material which es­capes from the cavity into this clear­ance space.
Vertical lathe. (Mach.) A type of ver­tical boring mill which carries a side head.
Vertical tail area. (Aera.) Then area of the actual outline of the rudder and the line projected in the vertical plane, the fairings and fillets being ignored.
Vertimeter. (Aero.) A device for in dicating the rate of rise and fall of an aerostat, usually a special form of statoscope. A rate of climb meter serves the same purpose, although of a different form.
Vestibule. (Arch.) A small entrance room, either to a building or to a room within the building.
VHD. A videodisc system developed in Japan by JVC and backed by British company Thorn EMI.
VHF. Very High Frequency" radio waves. VHS. Video format developed in Ja­pan, by JVc.
Viaduct. (ElIgill.) A large masonry, bridgclike structure for carrying a roadway or railroad over a valley, gorge, or the like.
Vibrating bell. (Elec.) An electric device having a clapper or ham­mer which strikes a bell rapidly when an electric current flows through it. It operates on the prin­ciple of electro-magnetic attraction.
Vibration. A regular to and fro or shaking movement. Vibration-curve. Visual display of
vibration or sound covering many cycles. .
Vibration dampeners. (Aula.) Coun­terweights or balancers on a crank­shaft for the purpose of reducing vibration. Vibrato. Rapid undulation of pitch. Not to be confused with tremolo.
Vibrator coil. (Elec.) An induction coil so constructed that the mag­netism of the core operates the make and break or vibrator of the primary circuit.
Video. (Tel.) That portion of the tele­vision signal which contains the picture information. Video is also loosely used as a synonym for tele­vIsion.
Video cartidge. A self-contained video module played on a specially designed video tape recorder. The cartridge contains one reel of video tap which is fed out of the car­tridge into the internals ofthe VTR and then rewound onto the car­tridge after play.
Video cassette. A self-contained video module played on a specially designed video tape recorder: simi­lar in design to an audio cassette; houses two reels-supply and take­

Video cassete recorder to Vinyl acetal resin

up with the tape running between them but connected to both, For­mats include: YHS, Beta, 2000 U­Matic, and Video 8.
Video cassette recorder. (VCR). A machine that records television pic­tures and sound on the magnetic recording tape which is wound in­side plastic box.
Video distribution amplifier. A spe­cial amplifier for strengthening the video signal so that it can be sup­plied to a number of video monitors at the same time.
Video enhancer. A circuit designed to boost picture detail. Useful in dub­bing or sharpening images in low­quality tapes.
Video processing. Any electronic manipulation of a video signals. Two examples of video processing dur­ing dubbing are colour and bright­ness adjustments.
Vide tape recorder. VTR; an electro­mechanical device capable of re­cording, storing, and reprodu.::ing an electronic signal which contains audio, video and control informa­tion.
Vide gain. 'The amplitude of the video signal; the control on a VTR which determines the "volume" level of the video signal.
Video head. An electromagnet used to channel pictures and sounds into signals on video tape and to change them back.
Viewdata. A system of sending com­puter signals down a telephone line and displaying them as text words or graphic designs on the screen of a modified TV set. The British Post Office (British Telecom) runs a viewdata service called Prestel.
Viewlinder. The part of the camera you look through to see what you are taking a picture of.
Viewing mirror. (Tel.) A mirror used to reflect the image formed on a picture tube in indirect-view recei­vers at a convenient viewing angle.
Vignette. (Arch.) A vine-like orna­mont. (Print.) (I) A half tone cut whose lines fade away until they vanish on the surface of the paper. (2) A small decorative design used before the title-page, or at the be­ginning or end of a chapter.
Vignetted halftone. (Print.) A half tone on which one or more of the edges ofthe object are shaded from dark tones to pure white.
Vinyl acetal resins. (Chern. Plast.) Prepared from pol~vinyl acetate. Used as an interlayer in safety glass and as a bonding resin. Properties are toughness, adhesiveness, im­perviousness to moisture, stability