bellows


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bellows,

expansible, gas-tight chamber used to pump or store a gas. One of the simplest and most familiar types of bellows is the manual one used for providing a forced draft to a fire. The expansible chamber consists of a leather bag with pleated sides. The bag is fixed between handles in such a way that they can be used to make it expand and contract. The inlet and outlet vents are provided with valves so that air must enter through the first and leave through the second. The device thus comprises a simple air pump. One of the major uses of the bellows has been to provide a draft for fires that are used to help extract a metal from its ore. In a device such as an aneroid barometer a small bellows is filled with a known amount of gas that expands and contracts in response to changes in external pressure. This small bellows is coupled to some form of indicating or recording device. Another use of the bellows has been to provide wind for such musical instruments as the accordion and older pipe organs.

bellows

[′bel·ōz]
(engineering)
A mechanism that expands and contracts, or has a rising and falling top, to suck in air through a valve and blow it out through a tube.
Any of several types of enclosures which have accordionlike walls, allowing one to vary the volume.
(optics)
An accordionlike component of a camera which forms a passage between the lens and the film and allows one to vary the distance between them.

bellows

bellows
Devices used for measuring pressure. They are circular corrugated metal capsules, which are either evacuated or filled with an inert gas. As the pressure changes, the bellows either contract or expand, and this expansion/contraction is converted into a circular motion providing an indication of the change in pressure.

bellows

1. an instrument consisting of an air chamber with flexible sides or end, a means of compressing it, an inlet valve, and a constricted outlet that is used to create a stream of air, as for producing a draught for a fire or for sounding organ pipes
2. Photog a telescopic light-tight sleeve, connecting the lens system of some cameras to the body of the instrument
3. a flexible corrugated element used as an expansion joint, pump, or means of transmitting axial motion
References in classic literature ?
Two terrible lions had fastened on a bellowing bull that was with the foremost cows, and bellow as he might they haled him, while the dogs and men gave chase: the lions tore through the bull's thick hide and were gorging on his blood and bowels, but the herdsmen were afraid to do anything, and only hounded on their dogs; the dogs dared not fasten on the lions but stood by barking and keeping out of harm's way.
Dawkins, and giving Master Bates a reproving tap with the nozzle of the bellows.
For several hundred yards the bellowing bull carried his two savage antagonists, until at last the blade found his heart, when with a final bellow that was half-scream he plunged headlong to the earth.
But after his first bellow, Wolf Larsen made no noise.
Bellows said Western Asset expected the inaction taken by the U.
She was painted by American realist George Bellows and used to belong to .
The conveyor consists of numerous bellows modules that deform the surface creating a wave motion that transports the objects in a targeted manner.
The company has developed the metal bellows type PRIME MOVER actuator, a linear actuator that combines the actuation and dynamic sealing functions into one unit.
In "Buzzing Bellows", he deals with the under current whisperings, hounding bellows and outrageous happenings in the country.
George Bellows 10 June-8 October 2012 National Gallery, Washington DC Catalogue by Charles Brock (Ed.
Atlas frequently misuses the word "comfortable" and he misses Bellows allusions to Joyce's Portrait of the Artist, to Dostoyevsky's Notes from Underground, to the artist Christo, and to Jack Warner's "writers are schmucks with typewriters.
Sprinkled throughout the book are a number of brief quotes from Bellows that further enhance this meaningful publication.