Extension Springs
Contents |
[edit] Introduction
A wide range of springs are available for use in a huge number of applications, many which are not obvious. Extensions springs are just one of the types of springs that are used in everyday objects.
Extension springs are wound particularly tightly, meaning that they are loaded in tension. On each end of the spring, there is a hook or a loop, so when something is attached to each end of the spring, tension is applied and the spring attempts to bring the two items back together.
When pressure is applied to either end of the spring, the spring extends with differing tension dependent on the manipulation of the tension of the wind.
[edit] Materials
Just as with other types of springs, extension springs can be made from a range of materials including:
- High carbon steel.
- Stainless steel.
- Alloy steels.
- Non-ferrous alloys.
- High-temperature alloys.
These materials have different properties, so will be chosen according to the requirements of the spring.
[edit] Application 1: Trampolines
Extension springs are commonly used in trampolines due to their energy-storing properties. As the net of the trampoline has pressure applied by the weight of a person, tension is applied to the spring which then attempts to snap back into its original position. This allows for the action of bouncing on the trampoline.
[edit] Application 2: Toys
Very small extension springs may be used in toys that feature a throwing mechanism. The mechanism may allow for a part of the toy to be pulled back, with the release expelling enough energy to launch the item thrown by the toy.
[edit] Application 3: Prison Springs
A slightly different form of extension spring is the drawbar spring. This spring has three parts with two ‘U’ shaped wire forms being inserted into the middle of the extension spring. If the two ends of the wire forms are pulled apart, the spring is compressed. This means that there is a limit to the compression, thus making it a particularly safe spring to use in applications where this must be limited. For example, they may be used to hold safety netting between landings in prisons. The design of the spring means that should someone fall onto the netting, there would be enough movement in the spring to allow for some movement, but the spring could not extend completely which could cause the netting to collapse.
[edit] Find Out More
Related articles on Designing Buildings Wiki
- Compression Springs
- E-spring
- Spring materials.
- Key Qualities of Springs
- Spotlight on Compression Springs
- History of the Spring
- Spotlight On: Flat Springs
- The Multiple Uses of Compression Springs
- The Difference Between Tension and Torsion Springs
- The Properties of Die Springs
- Torsion Springs and Their Benefits
- Springs in Structures
- Types of spring.
--Airedale Springs 10:35, 20 Sep 2017 (BST)
Featured articles and news
Shading for housing, a design guide
A look back at embedding a new culture of shading.
The Architectural Technology Awards
The AT Awards 2025 are open for entries!
ECA Blueprint for Electrification
The 'mosaic of interconnected challenges' and how to deliver the UK’s Transition to Clean Power.
Grenfell Tower Principal Contractor Award notice
Tower repair and maintenance contractor announced as demolition contractor.
Passivhaus social homes benefit from heat pump service
Sixteen new homes designed and built to achieve Passivhaus constructed in Dumfries & Galloway.
CABE Publishes Results of 2025 Building Control Survey
Concern over lack of understanding of how roles have changed since the introduction of the BSA 2022.
British Architectural Sculpture 1851-1951
A rich heritage of decorative and figurative sculpture. Book review.
A programme to tackle the lack of diversity.
Independent Building Control review panel
Five members of the newly established, Grenfell Tower Inquiry recommended, panel appointed.
Welsh Recharging Electrical Skills Charter progresses
ECA progressing on the ‘asks’ of the Recharging Electrical Skills Charter at the Senedd in Wales.
A brief history from 1890s to 2020s.
CIOB and CORBON combine forces
To elevate professional standards in Nigeria’s construction industry.
Amendment to the GB Energy Bill welcomed by ECA
Move prevents nationally-owned energy company from investing in solar panels produced by modern slavery.
Gregor Harvie argues that AI is state-sanctioned theft of IP.
Experimental AI housing target help for councils
Experimental AI could help councils meet housing targets by digitising records.
BSRIA Occupant Wellbeing survey BOW
Occupant satisfaction and wellbeing tool inc. physical environment, indoor facilities, functionality and accessibility.