AskDefine | Define bellow

Dictionary Definition

bellow

Noun

1 a very loud utterance (like the sound of an animal); "his bellow filled the hallway" [syn: bellowing, holla, holler, hollering, hollo, holloa, roar, roaring, yowl]
2 United States novelist (born in Canada in 1915) [syn: Saul Bellow]

Verb

1 shout loudly and without restraint [syn: bawl]
2 make a loud noise, as of animal; "The bull bellowed" [syn: roar]

User Contributed Dictionary

English

Pronunciation

Etymology

belwen, from bylgian, cognate with belg “leather bag,” bellan “to roar,” blāwan “to blow”

Noun

  1. the deep roar of a large animal, or any similar loud noise

Translations

the deep roar of a large animal, or any similar loud noise

Verb

  1. to make a noise like the deep roar of a large animal
  2. to shout or scream in a deep voice

Translations

to make a noise like the deep roar of a large animal
to shout or scream in a deep voice
Translations to be checked

Extensive Definition

A bellows is a device for delivering pressurized air in a controlled quantity to a controlled location. Basically, a bellows is a deformable container which has an outlet nozzle. When the volume of the bellows is decreased, the air escapes through the outlet. A bellows typically also has a separate inlet and valves or flaps for ensuring that air enters only through the inlet and exits only through the outlet.

Metallurgy

Several processes, such as metallurgical iron smelting and welding, require so much heat that they could only be developed after the invention of the bellows. The bellows are used to deliver additional air to the fuel, raising the rate of combustion and therefore the heat output.
Various kinds of bellows are used in metallurgy:
  • Box bellows were and are traditionally used in Asia. (1)
  • Pot bellows were used in ancient Egypt. (2)
  • Accordion bellows, with the characteristic pleated sides, have been used in Europe for many centuries. (3)
  • Piston bellows were developed in the middle of the 18th century in Europe (4). However, the double action piston bellows were utilised by the Han rulers in ancient China as early as the 3rd century BCE (5).
  • Metal bellows were made to absorb axial movement in a dynamic condition.Often referred to as Axial Dynamics bellow types (6)
The ancient Chinese engineer Du Shi once applied water-power (waterwheel) to operate bellows of a blast furnace forging cast iron. The ancient Greeks, ancient Romans, and other civilizations used bellows in bloomery furnaces producing wrought iron.
In modern industry, reciprocating bellows are usually replaced with motorized blowers.

Further applications

  • Bellows are widely used in Industrial Applications such as Rod Boots, Machinery Way Covers, Lift covers and Rail Covers.
In musical instruments, the bellows is often employed as a substitute or regulator for air pressure provided by the human lungs.
The following instruments use bellows:

See also

  • sylphon for uses of metal bellows in experimental physics and engineering.

External links

bellow in Czech: Měch
bellow in German: Blasebalg
bellow in Spanish: Fuelle (neumático)
bellow in Esperanto: Balgo
bellow in French: Soufflet (outil)
bellow in Italian: Mantice
bellow in Latin: Follis
bellow in Lithuanian: Dumplės
bellow in Dutch: Blaasbalg
bellow in Japanese: 鞴
bellow in Norwegian: Blåsebelg
bellow in Simple English: Bellows
bellow in Finnish: Palje
bellow in Portuguese: Fole de ferreiro
bellow in Swedish: Bälg
bellow in Turkish: Körük
bellow in Samogitian: Domplės

Synonyms, Antonyms and Related Words

bark, battle cry, bawl, bay, be angry, be excitable, bell, bellow out, blare, blat, blate, bleat, blow a gasket, blow up, blubber, bluster, boom, bray, breathe, buzz, cackle, call, call out, catch fire, catch the infection, caterwaul, chant, cheer, chirp, clamor, come apart, coo, crow, cry, cry out, drawl, excite easily, exclaim, explode, fire up, flame up, flare up, flash up, flip, flute, gasp, get excited, give tongue, give voice, go into hysterics, growl, grunt, hail, halloo, have a tantrum, hiss, hit the ceiling, holler, holler out, hollo, hoot, howl, hurrah, keen, lilt, low, make an outcry, make an uproar, meow, mew, mewl, miaow, moo, mumble, murmur, mutter, neigh, nicker, outcry, pant, pipe, pipe up, pule, rage, raise a clamor, rallying cry, ramp, rant, rant and rave, rave, roar, rout, rumble, run a temperature, screak, scream, screech, seethe, shout, shout out, shriek, sibilate, sigh, sing, sing out, smolder, snap, snarl, snort, sob, squall, squawk, squeak, squeal, storm, take fire, thunder, troat, trumpet, turn a hair, twang, ululate, vociferate, wail, war cry, war whoop, warble, whicker, whine, whinny, whisper, whoop, yammer, yap, yawl, yawp, yell, yell out, yelp, yip, yo-ho, yowl
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