Commutator bar. (Elec.) See Commutator.
Compact car. (Auto.) An automobile, of any body style, designed especially for easy parking, ease of operation, low maintenance cost and high mileage per gallon of gasoline.
Compact cassette. Cassette system (Philips) which works at tape speed of 4.74 cmps and tape width on.2 mm. 9.5 cmps and 2.34 cmps now also permitted.
Compact disc (CD). A relatively new type of disc record which needs a special player. The disc is reflective and is read by a laser. .The sound is recorded in the form of digital pulses.
.Compander. Device or circuit which compresses dymaic of a signal to suit particular medium or purpse, with corresponding inverse expansion on replay. Reduces any noise introduced between the two stages.
Comparator. (Shopwk.) A machine designed by James Hartness to measure screw threads and similar parts by projecting an enlarged shadow on a chart to compare the screw with the desired standard.
Compass. An instrument with two legs, usually pointed, and joined atthe top; used for taking or marking measurements, subdividing distances, describing circles, curves, etc. (Elec.) A permanent magnetic needle balanced in centre and usually supported above a chart for convenience in reading directions on the surface of the earth.
Compass plane. (Furn.) A plane with adjustable sole, used for smoothing concave or convex surfaces.
Compass saw. (Woodwkg.) A type of handsaw with small tapering blade, used for cutting in a small circle or the like.
Compatible. Usable is more than one
format. A stereo recordinl! or broadcast which produces mono on mono equipment is "mono compatible". A computer program that can be used on more than one type of computer or a videodisc or cassette that can be used on more than one piece of hardware is also said to be compatible. Note that although the three video formats. VHS, Beta and V 2000 all use tape the same width (12.5 mm) the cassettes are different and the formats are incompatible.
Compatible colour. A TV broadcast system which produces a colour signal that can be received by either a black and white or colour set. The luminance values (the basis of colour reception) are broadcast as different portions of the total signal so that the luminance values are not dependent on the Chrominance valuesfor reproduction.
Compendium. An abridged edition which summarizes the subjects
Compensated pendulum. A pendulum made of two materials which.
h~lVe different coefficients of expansion and are so chosen that the length of the pendulum remains constant when the temperature varies.
Compensated wattmeter. (Elec.) A wattmeter which has a compensat- I ing coil connected in series with the I
potential coil for the purpose of correcting the error caused by the absorption of power due to mechanical operation of the potential coil.
Compensating. (E/ec.) A coil which serves to compensate for the mechanical friction in the moving coil of a meter.
Compensator. (E/ec.) An auto transformer with a switching mechanism for starting large alternatingcurrent induction motors.
Complementary angles. (Math.) Two angles which, added together, equal 90 deg.
Complementary colour. One of two colours, which, when combined, produce white or nearly white light.
Complementary symmetry. Transistor amplifier circuit configuration, usually output stage or driver stage, employing matched transistor pairs with complementary polarities (n-p-n andp-n-p). .
Completed circuit. (Elec.) Also called closed circuit. One that has been made or closed.
Complex. Intricate, involved, made up of many parts.
Complex steel. (Metal.) Steel which contains more than two alloying elements.
Compliance. The flexibility of a phono cartridge. The unit of compliance is 10-6 em/dyne.
Complicate. To make complex, difficult, or hard to deal with.
Compo board. A trade name for a building board made of narrow strips of wood glued together to make a large sheet, both sides being faced with a heavy paper.
Component. One of the various forces which combine to make the resultant.
Composing machines. (Print.) Machines for mechanical typesetting (Monotype, Linotype, Intertype, and Ludlow).
Composing room. (Print.) A room where type is set and inade up into forms for printing.
Component board. Rigid board car
.rying components in electronic equipment. Usually with printed circuit on one side and components on reverse.
Component system. An audio system consisting of separate units: turntable, tuner, amplifier, speakers"etc.
Composing rule. (Print.) A brass or steel strip, usually two point. thick, against which type is composed.
Composing stick. (Print. ) A metal device used by compositors for holding type while it is being assembled into lines.
Composite order. (Arch.) The most.
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