Bump to Burn
which drives the table. (2) A wheel around which a rope is wound for lifting heavy objects.
Bump. (Aero.) A sudden acceleration
of an aircraft caused by a region of unstable atmosphere characterized by marked local vertical components in the air currents.
Bumper. (Auto. Mech.) A safety device of spring steel or wood placed. on front and rear ends of an automobile to provide protection at those points.
Bumper bag. (Aero.) A cushion secured to the bottom of an airship to prevent damage when in contact with the ground.
Bumper blocks. (Auto. Mech.) Rubber blocks used between axles and bar frame to absorb effect of severe shocks.
Bumpi.,g hammer. (Sheet-Met. Wk.) Used for closing down seams on large work such as waste receptacles, etc. .
Bundling machine. (Print.) A clamping device for compressing signatures, padding etc.
Bun foot. (Furn.) A foot shaped like a flattened ball.
Bung. (Ceram.) A quantity of filled fire-clay boxes in a kiln.
Bungalow. (Arch.) A one-story house with verandas. Sometimes the attic is finished as a second story.
Bunker. (Engin.) A compartment in which fuel, usually coal, is stored.
Bunsen burner. A gas burner, commonly used in the laboratory, in which mixture of gas and air is burned at the top of a tube, producing an intensely hot flame.
Buoyancy. (Aero.) The upward force on an aerostat which is derived from aerostatic conditions. It is equal to the weight of air displaced. (Phys.) The resultant upward pressure of a fluid on an immersed or floating body. The power or tendency to keep afloat.
Burble. (Aero.) A term designating the breakdown of the streamline flow about a body.
Burette~ (Chem.) A finely graduated glass tube by which a small quantity of a solution can be drawn off at a time.
Burl. (Wood) (I) A wartlike growth on a tree trunk caused by abnormal growth an containing piths of many undeveloped buds. (2) A beautifully marked veneer cut from burls.
Burlap. A coarse-woven material of jute; used for wrappings, hangings, decorations, etc.
Burling. (Textile) A process in cloth finishing. It removes burrs, knots, and similar imperfections from the surface.
Bum. To destroy the light conversion function of a certain portion of the vidicon target area; caused by exposure to a light source that is too intense; also the result, an image
Burned the target area which appears as black spots during display.
Burned bearing. (Auto. Mech.) The black rough .surface of a bearing usually caused by poor lubrication.
Burnett's process. (Wood) The impregnation of timber with chloride of zinc as a preservative.
Burning. (Chern.) Oxidation which takes place so rapidly that heat and light are released.
Burnish. (Mech.) To polish a metallic surface by the friction of another metallic surface brought in contact with it. (Furn.) To polish or smooth wood carving to give the appearance of modeling.
Burnisher. (Shopwk..) Tool of hardened and polished steel for finishing metals. by friction. It is held against the revolving work and gives a smooth surface by compressing the outer layer of metal.
Burr. (Shopwk.) The ragged or turned down edge of a piece of metal resulting from grinding, cutting, or punching. (Print.) A piece of dead metal adhering to a linotype slug, causing a blurred impression.
Burring machine. (Sheet-Met. Wk.) Used for turning edge on cylinders of metal or on disks such as can bottoms.
Burring reamer. A tapered reamer used for countersinking and for removing burrs caused in cutting pipe.
Burst flat. A pulse produced by a colour sync generator; when present, it causes the signalling colour camera to produce a burst
signal.
Burst signal. Colour burst; a set of high frequency (3.5 MHz) pulses at the beginning of each line which determines the phase of the colour signal.
Bus. A signal path to which a number of inputs may be connected for feed to one or more outputs. In a mixing console a bus is usually a long piece of' wire to which any input channel may be connected by means of a switch control. The end of the wire goes into a combining amplifier or summing amplifier which then feeds one of the console outputs.
Bursting strength. The resistance of paper to pressure is measured on a Mullen tester in pounds per square inch.
Bus bar. (Elec.) One of the strips of copper run on a switch and panel board from which all circuits are tapped. (Common feeders.)
Bush. (Auto. Mech.) (I) To fit a hollow sleeve into some part in order that it may serve as a bearing. When wear occurs, a new bushing may be applied, avoiding the necessity of replacing an entire part. (2) In general, the insertion of any piece to bring about a reduction of diameter.
Busheled iron. (Metal.) An iron produced in a puddling furnace from junk scrap.
Bushing. (Mach.) A sleeve or liner for a bearing, permits accurate adjustment and inexpensive repair. (Plumb.) A plug designed to be threaded into the end of a pipe. One end is bored and tapped to
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