Bell switch
"house circuit to supply current for bell ringing. .
Bell switch. (Elec.) A switch for cutting a bell in or out. of a circuit.
Belly. (Fum.) A protruding surface caused by buckling, warping, etc. (Leather.) The inferior leather which comes from the underneath part of an animal. (Print.) A gradual depression in the center of a line of type.
Belt. (Masonry) A projecting band course or courses, or a course of a different kind of brick. (Mech.) A band strap, of leather, canvas, or other material, flexible enough to act as a transmitter of power over smooth pulleys, acting by friction only.
Belt clamp. (Mech.) A device for holding the two ends of a belt together while they are being connected.
Belt conveyor. A wide belt .running over pulleys, transporting materials laid upon it.
Belt dressing. Any of the various compounds used on machinery belting to prevent slipping.
Belt hook. (Shopwl) A device used for shifting belts manually. It usually C'onsists of a long pole or stick with projecting pin, hence lhe name hooK.
Belt lacing. (Mach.) A narrow strip of rawhide used for lacing the ends of a belt together. Wire h.ooks and othe types of fasteners are sometimes incorrectly spoken of as "belt lacing."
Belt. sander. (Wo£)dwkg.) A motor-dnven machine equipped with a belt of sandpaper for finishing
j.
Belt shifter. (Shopwk.) Usually a flat strip of wood 4 or 5 ft. long having shifter fingers or anns attached to it; used for shifting a belt from tight to loose pulleys and vice versa on overhead shafting. .
Bench. (Shopwk.) A strong table equipped with vise and other implements to facilitate the work performed on it.
Bench assembly. (Shopwk.) The . process of fitting and putting together, two or more parts on a bench. The fitting m!iy require filing, scraping, tapping, reaming, soldering, drilling, fastening with screws, and the like.
Bench dog. (Shopwk.) A dog of wood or metal inserted in a slot or hole near the end of a bench; used to prevent a piece of work from slipping. Different from bench stop.
Bench hook. (Woodwkg.) A flat piece of wood with cleats on both sides, one at each end, used to prevent injury to the bench top during certain operations. .
Bench lathe. (Mach.) A small lathe . mounted on a workbench for handling light work.
Bench plane. Plane. kept on the bench, being in constant use, as jack, trying, and smoothing planes.
Bench stop. (Wopdwkg.) An adjustable metal device, usually with a notched edge, set into a bench top near its end. Work is placed against it while being planed.
Bench vise(Mach.) The ordinary machinist s VIse, either plain or swivel. .
Benchwork. (Woodwkg. and SheetMet. Wk.) Term used to distinguish
BemouUi effect
Bernoulli effect.The decrease in pressure as the velocity of a fluid increases.
Beryllium. (Meta/.) One .of the lightest and hardest metals known. It readily alloys with aluminium.
dessemer steel. The mild steel produced directly from the pig in the Bessemer converter.
Beta. The second letter of the Greek alphabet (B.~): the second brightest star .of a constellation.
Beta decay. A radioactive process in which a beta particle is emitted from the nucleus of an atom raising the atomic number of the atom by one if the particle is negatively charged, lowering it by one of positively charged.
Beta particle. (Chern.) An electron, negative or positive, thrown off by many radioactive materials.
Beta ray. (Chern.) One of the three types of rays emitted by radioactive substances.
Betatron. (Elec.) An electric device in which electrons revolve in a vacuum enclosure in a circular or a spiral orbit normal to a magnetic field and have their energies continuously increased by the electric force resulting from the
variation with time of the
magnetic flux enclosed by their orbits.
Beton. (Print.) The name of a type family which originated in Germany.
Bevel. (Furn.) A sloping edge; also a tool similar to a square. (Shopwk.) Any surface not at right angles to the rest of the piece. When at 45 deg., the bevel is frequently called a "miter."The name is also given to the tool for measuring or laying off bevels. When combined with a scale of degrees, it is called a "bevel protractor." (Woodwk. and Metalwk.) A tool used for testing the accuracy of work cut to an angle or bevel.
Beveled rule. (Print.) A rule which has its face on a beveled surface.
Beveled sticks (Print.). Pieces of wood or metal, which when used with wedges or quoins, hold type securely in a galley.
Bevel gears. (Engin.) Gear wheels which transmit power between two shafts which meet at an angle. If at
right angles, and the wheels are of the size, they are called "miter gears."
Beveling in welding. The flattening or tapering of the ends of pieces to be welded in order to make a smoother looking job.
Bevel protractor. An adjustable tool for measuring angles.
Bevel washer. Used frequently in structural work to give a flat bearing'
for the nut when a tl1readed rod passes through a beam at an angle.
Bezel. The metal right around the dial glass of aclock. (Jewelry) The metal rings which hold a jewel. (Mach.) The bevel on the edge of a cutting too I.
Biamplification. In a conventional sound system the full range audio signal passes through one amplifier and feeds a high-level crossover within the speaker that divides the audio to feed the low and high frequency drivers. In contrast, a biamplified system utilises a
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