Ferrule

Ferrule

A ferrule (a corruption of Latin "viriola" "small bracelet," under the influence of "ferrum" "iron.") is a name for types of metal objects, generally used for fastening, joining, or reinforcement. They are often narrow circular rings of metal, or less commonly, plastic.

Most ferrules consist of a circular clamp used to hold together and attach fibers, wires or posts, generally by crimping, swaging, or otherwise deforming the ferrule to permanently tighten it onto the parts that it holds.

Examples of such ferrules:
*On a two-piece kayak paddle, the part that connects the two ends together.
*In a brush the ferrule binds the bristles or hair to the handle.
*On an ice axe, the metal spike at the end of the shaft
*The metal ring which is crimped to hold the eraser in place on pencils with an attached eraser
*The metal ring which holds a chisel blade's tang to the handle
*In fiber optic terminations, glass or plastic fibers are bonded to precision ferrules and polished for splitting or connecting two fibers together [Ref patent
country=US
number=5016970
status=patent
title=Ferrule for optical fiber transmitting linearly polarized light and optical fiber connector using this ferrule
gdate=1991-05-21
fdate=1989-08-10
invent1=Mito Ryo Nagase
invent2=Machida Juichi Noda
invent3=Tachikawa Etsuji Sugita]
* In restorative dentistry, margin of a cast crown that stabilizes root-canal treated teeth [ [http://www.ncbi.nlm.nih.gov/sites/entrez?db=pubmed&cmd=Search&Term=ferrule NIH search] ]
* In golf, a plastic sleeve that adorns the bottom of most steel and graphite shafts just above the club head hosel. Originally designed to protect the shaft from damaging vibrations, it is now used mainly for aesthetic purposes
* In musical instruments, a metal band used to prevent the ends of wooden instruments from splitting. Also the semi-circular metal band that holds the fibers in place on the frogs of bows for violin family instruments.
*Compression fittings for attaching tubing (piping) commonly have ferrules in them.
*A swaged termination type for wire rope
*Cap at the end of a cane or umbrella.
*In pool and billiards, the portion of a cue that tops the shaft and to which the leather tip is bonded; historically made of ivory, now typically made of phenolic resin
*In fishing, the male and female joints that join one section of a rod to the next is known as the ferrule.
*In bicycles, a metal cap at the end of cable housing with a hole for the cable

References


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Look at other dictionaries:

  • Ferrule — (engl. für Hülse) steht für: Die Aderendhülse, zum Verpressen von flexiblen Leiterenden; Verbinden von Einzeladern an Schraubklemmen, Federzugklemmen in der Elektrik. Das Führungsröhrchen, das im Stecker eines Lichtwellenleiters die Faser… …   Deutsch Wikipedia

  • ferrule — ferrule, ferule Ferrule, also spelt ferrel, is the ring or cup used to strengthen the end of a walking stick or umbrella, and is derived from Latin ferrum meaning ‘iron’. A ferule, also spelt ferula, is a flat implement formerly used for beating… …   Modern English usage

  • ferrule — [fer′əl, fer′o͞ol΄] n. [formerly verrel < ME & OFr virole, iron ring on a staff < L viriola, dim. of viriae, bracelets, via Celt < IE * weir , wire, twisted work (> WIRE) < base * wei , to bend, twist > L viere, to twist, bind… …   English World dictionary

  • Ferrule — Fer rule (f[e^]r r[i^]l or f[e^]r r[.u]l; 277), n. [Formerly verrel, F. virole, fr. L. viriola little bracelet, dim. of viriae, pl., bracelets; prob. akin to viere to twist, weave, and E. withe. The spelling with f is due to confusion with L.… …   The Collaborative International Dictionary of English

  • ferrule — metal cap on a rod, 1610s, ferule, earlier verrel (early 15c.), from O.Fr. virelle, from L. viriola bracelet, dim. of viriae bracelets, from a Gaulish word (Cf. O.Ir. fiar bent, crooked ); spelling influenced by L. ferrum iron …   Etymology dictionary

  • ferrule — ► NOUN 1) a ring or cap which strengthens the end of a handle, stick, or tube. 2) a metal band strengthening or forming a joint. ORIGIN Old French virelle, from Latin viriae bracelets …   English terms dictionary

  • ferrule —    The metal or plastic device that that aligns and anchors paintbrush bristles or hairs in an adhesive. The ferrule is attached to the handle by crimping or by binding wires. The ferrule pictured here has a brassy color. (pr. fe rool) …   Glossary of Art Terms

  • ferrule — UK [ˈferuːl] / US [ˈfeˌrul] noun [countable] Word forms ferrule : singular ferrule plural ferrules a piece of metal or rubber fixed to the end of a stick or post to prevent it from being damaged …   English dictionary

  • ferrule — Thimble Thim ble, n. [OE. thimbil, AS. ??mel, fr. ??ma a thumb. [root]56. See {Thumb}.] 1. A kind of cap or cover, or sometimes a broad ring, for the end of the finger, used in sewing to protect the finger when pushing the needle through the… …   The Collaborative International Dictionary of English

  • ferrule — /fer euhl, oohl/, n., v., ferruled, ferruling. n. 1. a ring or cap, usually of metal, put around the end of a post, cane, or the like, to prevent splitting. 2. a short metal sleeve for strengthening a tool handle at the end holding the tool. 3. a …   Universalium

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