Gangue to Gauge

Gangue to Gas emgine

Gangue. (Mineral.) The non-metalli­ferrous minerals found in a vein of ore.
Gangway. A passageway to or out of any enclosure. The term is mostly used in its nautical sense, meaning the opening in the bulwark of a vessel, also the gangplank leading from wharf to deck..
Gantry. (Aerosp.) A movable, crane­like structure, with platforms on different levels, used to erect, as­semble, and service large missiles at the site of lunching.
Gap. (Aero.) The distance separating the wings of a biplane. (Auto.) (1) The space between the electrodes of a
spark plug. (2) The distance between contact points when open. (3) The air gap in an electrical cir­cuit.
Gap bed. (Mach.) A lathe bed having a portion recessed. out in front of and below the headstock, to receive work larger in diameter than the lathe would otherwise accommo­date. The bed is strengthened below the gap. The gap when not in use is filled up with a gap bridge.
Gap depth. The dimension of the magnetic head pole face measured perpendicular to the head to tape contact surface.
Gap length. The distance between the pole faces at the gap. The effective gap length is usually somewhat greater than the mechanical gap length.
Gap loss. The relative frequency response of a reproduce head compared to the response of an ideal head. This loss becomes significant as the reproduced wavelength approaches the effective gap length.
Gap shears. (Sheet-Met. Wk.) A shearing machine similar in pur­pose to the squaring shears. The gap in the housings permits the insertion of the sheet of metal ei­ther fengthwise or .crosswise. It takes the place of long-length shears where floor spaee is lim­ited.
Gap shorting. The mechanical dis­placement of the head gaps in a multi-track head measured in the direction of tape motion.
Garden bond. (Masonry) Consists of three stretchers in each course followed by a header, although this bond may have from two to five stretchers between headers.
Garderobe. (Woodwkg.) A wardrobe. A private room.
Gargoyle. (Arch.) A stone spout, gro­tesquely carved, projecting at the upper part of a building.
GameL A reddish gem stone found in 1'0ck formations. It is used as an abrasive and for watch bearings.
Garnet paper. Paper coated with gar­net grains, used in the same manner as sandpaper. .
Garnierite. (Metal.) An important ore of nickel containing about 5 per cent nickel, found in New Caledonia.
Gas brazing. A brazing process wherein the heat is obtained from a gas flame.
Gas engine. An internal combustion engine designed to operated on a mixture of gas and air as a fuel.

Gaseous fuel to GaugeGaseoUs fuel, or "producer gas." This is gas prepared in a gas pro­ducer, from bituminous coal. Mixed with heated air it forms an eco­nomical and effective fuel for main­taining an even heat, e.g., for the heating of the tanks in which glass is melted in a glass factory.
Gas-filled lamp. (Elec.) A lamp which is exhausted of air and then filled to about atmospheric pressure by a mixture of inert gases usually nitro­gen and argon.
Gashing. (Mach.) The rough cutting of machine parts, particularly the teeth in bevel gears.
Gasket. (Mach.) Paper, metal, rubber, or especially prepared material used between cylinder head and cylin­der, or under similar conditions, to prevent leaking. (Naut.) A line or band used to lash a furled sail.
Gasoline. A volatile distillate from crude petroleum, used principally as a fuel in internal-combustion engines.
Gasoline engine. (Auto.) An internal­combustion engine designed to operate on a mixture of gasoline and air as a fuel.
Gas pliers. (Plumb.) Pliers used for gripping small pipe or round ob­jects.
Gas producer. A gas-making furnace in which coal gas is obtained by the distillation of fuel.
Gassing. (Elec.) The giving off the gas bubbles from a storage battery under charge, due to electro-chemi­cal action. (Textile) Burning off fuzzy ends from cloth to secure a smooth surface.

Gas turbine. (Aero.) A turbine ro­tated by expanding gases as in a turbojet engine or in a turbosuper­charger.
Gas welding. A nonpressurc (fusion) welding process wherein the heat is obtained from a gas flame.
Gate. (Fdry.) Any opening in a mold through which metal is poured to form a casting. (Tel.) Circuit which selects portion of a signal accord­ing to present time and/or ampli­tude parameters. Hence 'gating' device. .
Gated pattern. (Fdry.) A gang pat­tern consisting of several metal patterns fastened together so that it may be possible to produce a number of duplicate castings at one time. Very essential in production work on small parts.
Gate-legged table. (Fum.) A drop­leaf table, whose leaves, when raised, are supported by swinging or gate legs..
Gate valve (Engin.) A valve whose action depends on the motion of a wedge-shaped gate between the inlet and outlet openings.
Gathering. (Print.) Collecting and assembling in correct consecutive order signatures of a book or pam­phlet preparatory to binding.
Gauge. (Metal.) An instrument or device for determining the size of parts. Gauges for different purposes are known by specific
. names. (Plaster.) To mix plaster of Paris with common plaster to cause quick setting. (Woodwkg.) A tool used by wood workers to make a line parallel to the edge of a board.