Neets Master Glossary

1-4 ANTISEIZE COMPOUND—A silicon-based, high-temperature lubricant applied to threaded components to aid in their removal after they have been subjected to rapid heating and cooling [4]. ANTITRANSMIT-RECEIVE TUBE (atr)—A tube that isolates the transmitter from the antenna and receiver. Used in conjunction with a tr tube [18]. APERTURE—See SLOT [11]. APOGEE—The point in the orbit of a satellite the greatest distance from the earth [17]. APPARENT DRIFT—The effect of the earth's rotation on a gyro that causes the spinning axis to appear to make one complete rotation in one day. Also called APPARENT PRECESSION or APPARENT ROTATION [15]. APPARENT POWER—That power apparently available for use in an ac circuit containing a reactive element. It is the product of effective voltage times effective current expressed in volt-amperes. It must be multiplied by the power factor to obtain true power available [2]. APPARENT PRECESSION—See APPARENT DRIFT [15]. APPARENT ROTATION—See APPARENT DRIFT [15]. ARC EXTINGUISHER—The part of a circuit breaker that confines and divides the arc which occurs when the contact of the circuit breaker opens [3]. ARMATURE—(1) In a relay, the movable portion of the relay [3]. (2) The windings in which the output voltage is generated in a generator or in which input current creates a magnetic field that interacts with the main field in a motor [5]. ARMATURE LOSSES—Copper losses, eddy current losses, and hysteresis losses that act to decrease the efficiency of armatures [5]. ARMATURE REACTION—The effect in a dc generator of current in the armature creating a magnetic field that distorts the main field and causes a shift in the neutral plane [5]. ARRAY OF ARRAYS—Same as COMBINATION ARRAY [10]. ARTIFICIAL TRANSMISSION LINE—An LC network that is designed to simulate characteristics of a transmission line [18]. ASBESTOS—A noncombustible, nonconductive, fiber-like mineral used as an insulating material [4]. ASBESTOSIS—Fibrosis of the lungs caused by inhalation of asbestos fibers [4]. A-SCOPE—A radar display on which slant range is shown as the distance along a horizontal trace [18]. ASSEMBLY—A number of parts or subassemblies, or any combination thereof, joined together to perform a specific function [17]. ASTABLE MULTIVIBRATOR—A multivibrator that has no stable state. Also called free-running because it alternates between two different output voltage levels during the time it is on. The frequency is determined by the RC time constant of the coupling circuit [9]. ASWTDS—An abbreviation for the antisubmarine warfare tactical data system [17].