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 periodicals archive ?
[USPRwire, Wed Jul 31 2019] Automotive Bellows Market: Introduction In present times, bellows are considered to be essential part of an automobile, particularly employed in the steering and suspension system.
This pivotal moment seems to have captivated Bellows, inspiring her to trace the lives of these two Charlestonians in alternating chapters that focus most intently upon the war and its aftermath.
The Bellows DFT provides Air National Guard members the opportunity to receive vital readiness training and work with units from other states as well as international partners.
Ameriflex was founded in 1981 to provide bellows into the fledgling semiconductor industry.
Bellows provide additional protection for tooling and presses by blocking formulation from collecting on tools, reducing tool wear and binding.
The Barber, at the University of Birmingham campus, last year acquired Nude, Miss Bentham (1906), an early masterpiece by Bellows, formerly owned by Andy Warhol.
This volume contributes another precious painting in the great art gallery of critical responses to Saul Bellow's works.
has acquired Tennessee-based precision metalworks company Fulton Bellows, LLC, the company said.
The company says a good example of this is its range of valves available in a bellows seal design, such as its Type 808 bellows sealed globe valve.
Central to this system's design is the incorporation of an energy-damping bellows that acts like a shock absorber to protect devices from harsh wave conditions and is designed to stay slightly taut and respond smoothly when stretched to its limit, while dramatically reducing wear and tear.
She was painted by American realist George Bellows and used to belong to ...
This paper deals with the design of a bellows coupling from composite material which can be used as an alternative to a universal steel joint.