|
Bat to Beam ceiling.
Bati
size proper to the body.
Bat. (Ceram.) A term applied to a slab of fired caly and to a lump of moist clay. (Masonry) A broken brick or a part of a brick.
Batch. A quantity of anything , considered as a whole, as a batch of castings. A quantity of a mixture, as ' a batch of concrete.
Batik. (Textile) A method of resist dyeing in which wax is used to cover that part of the fabric which is not to take the dye.
Batten. (Fum.) A strip of wood placed across a surface of one or more boards to prevent warping, to strengthen, etc. A cleat is also termed a batten. (Plaster.) A strip used for attaching laths where studs are not accessible.
Batten door. (Arch.) A door made of " sheathing, secured by strips placed "'crossways, and nailed with clinched nails.
Batten down. (Naut.) To fasten down as with tarpaulin and strips or battens.
Battening. (Plaster.) The application of battens or strips to which laths or other material may be attached. (Textile) The driving up in close order of the filling threads in weaving.
Batter. (Arch. and Masonry) The slope of the face of a wall that is out of plumb. The backward and
upward slope of a retaining wall. (Print.) A breakage or marring of type or a plate so that it wiII not print perfectly.
Battery. (Elec.) A number of primary or storage celIs, condensers, or dynamos, grouped together as Ji single source of electricity. The term is incorrectly used when applied to a single cell.
Battery acid. (Elec.) The acid used in forming the electrolyte of a storage battery, usually sulphuric acid.
Battery capacity. (Elec.) The number of ampere hours that can be obtained from a storage battery.
Battery charger. (Elec.) An electrical device for charging a battery. It usually converts alternating current to direct current.
Battery container or battery case. (Elec.) The hard rubber or plastic casing into which the elements and electrolyte are placed.
Battery ignition system. (Auto. Mech.) The ignition system in which the initial current is supplied by the battery.
Battery voltage. (Auto Elec.) Electric pressure across terminal poles of a battery as measured by' a voltmeter.
Battlement. (Arch.) A parapet with a series of notches in it. The raised parts are umerlons"; the notches, "crenels." (Furn.) The design of such a parapet used as a decorative design on furniture.
Baumescale. A device for detemining specific gravity of liquids, particularly petroleum products. It has to a great degree been superseded by the American Petroleum Institute scale.
Bauxite. (Mineral.) A white ~o red earthy aluminium hydroxide; the principal source of the metal aluminium. It is largely used in the preparation of aluminium and alumina, and for the. lining of furnaces which are exposed to intense heat.
Bay. (Aero.) The portion of a face of a truss or of a fuselage, between adjacent bulkheads or adjacent struts or frame pgsitions. (Arch.) A space between two piers. or columns.
Bayonet socket. (Elec.) A ial1!P socket having two lengthwise slots iitits sides. These slots take a right-angled turn at the bottom, so that a lamp with two pins may be connected by pushing it into the socket and giving it a slight turn.
Baywood. (Wood) A wood softer and lighter than true mahogany which it closely resembles. Used in pattern making. Often called Phillippine mahogany.
Bazooka. (Rocketry) Arocket launcher open at both ends that is held to the shoulder when in use.
Beaching gear. (Aero.) An arrangement of wheels to be attached to the hull of seaplane to permit handling ashore.
Beacon. (Aero.) A light, group of lights, or other signaling device,indicating a location or direction.
Bead. (Arch.) A thin molding, usually half round in section. (Shopwk.) Almost any small circular molding, The cut down the middle of a piece of fencing causes it to be called a beaded board.
Beading. (Sheet-Met. Wk.) The forming of a bead on a piece of work for ornamenting or stiffening.
Beading machine. (Sheet Metal) A machine, which, by means of rolls of different shapes and sizes, impresses in the metal a bead corresponding in shape to the particular rolls used. The beading serves to ornament and strengthen the vessel.
Bead plane. (Woodwkg.) A special form of plane for cutting beads
Beaker. (Chem) A cylindrical vessel,generally of glass, with a lip for pouring.
Beakhead. (Arch.) A sort of drip mold . used on the extreme lower edge of the lowest member of a cornice.
Beakhomstake. (Sheet Metal)A stake having one end rounded and tapered, the other end long and .rectangular in section; used for bending and shaping square and conical objects.
Beam. (Aero.) (I) A radio-directional aid to air navigation. (2) The main spar of a wing. (3) The plane view of the side of an aircraft. (Arch.)A piece oftimberorothermatt<rial, or a builtup structure whose length is greater than its width or depth and whose strains are those due to leverage, tension or compression.
Beam ceiling. (Arch.) A ceiling in
|
