ferrule


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ferrule

, ferule
1. a metal ring, tube, or cap placed over the end of a stick, handle, or post for added strength or stability or to increase wear
2. a side opening in a pipe that gives access for inspection or cleaning
3. a bush, gland, small length of tube, etc., esp one used for making a joint
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

Ferrule

A metal cap placed at the end of a post for strength and protection against weathering of the end grain.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved

ferrule

[′fer·əl]
(design engineering)
A metal ring or cap attached to the end of a tool handle, post, or other device to strengthen and protect it.
A bushing inserted in the end of a boiler flue to spread and tighten it.
(engineering)
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

ferrule

A metal sleeve, esp. one which is fitted with a screwed plug; serves as an opening on the side of a pipe providing access for inspection or cleaning the interior of the pipe.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.

ferrule

A ceramic, plastic or stainless steel part of a fiber-optic plug that holds the end of the fiber and precisely aligns it to the socket. The fiber is inserted into the ferrule and cemented with an epoxy or adhesive, which gives it long-term mechanical strength and prevents contamination from the weather. Connectors may also use crimped ferrules that do not require cement. The ferrule is the most important and costly part of a fiber connector. If its length, hole centering and inside and outside diameters are not exact, a poor connection will result. See fiber optics glossary.


Fiber-Optic Ferrule
With the naked eye, one cannot see the tiny opening for the optical fiber. It is only visible under a magnifying glass. The epoxy or adhesive is squeezed into the ferrule before the fiber is inserted (bottom right).
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References in periodicals archive ?
Combine Ferrule and Guide Wraps--When setting out your guide spacing on a multipiece fishing rod, pay attention to where the ferrule wraps can overlap your guide placement.
Once the epoxy is dry, I grind the inside bottom of the ferrule and the stock back to the drain hole.
Check for tension between the lower band and stock ferrule. Any tension is good, no tension is bad.
If not, the sidewall of the female (hollow) ferrule can crack while casting.
According to USP's Frequently Asked Questions for General Chapter <1> Injections, Section on Labeling on Ferrules and Cap Overseals (August 4, 2010): "For those manufacturers who wish to maintain the information printed on the cap or ferrule, rationale must be provided to the FDA explaining why the instruction addressed in the statement in considered to be life threatening.
Cleaning the ferrule endface of optical connectors is one of the key factors to the quality of optical telecommunication networks.
In order to meet the customer's request to offer a more environmentally responsible packaging solution, MWV created a threaded ferrule adapted to its highly successful low profile Melodie pump to enable the customer to refill the bottle with refill-able formats sold separately by Hermes, according to the company.
The process incorporates four components: fitting insert, crimp ferrule, composite rubber seal, and braided metal hose.
Otterburn, on the fringes of the Northumberland National Park, is possibly the last place one would expect to find an Irish-bred, Hong Kong-raced son of Danehill, but it is where the well-travelled Ferrule has ended up and is, indeed, thriving.
A metal-to-metal stop controls gasket compression and prevents overtightening while minimizing ferrule movement.
Critical connectivity issues include the need to prevent loss producing micro-bends at the connector interface where the film leaves the board edge into the modified MT ferrule. It is necessary to optimize performance to match fiber and waveguide allowed propagating angles (referred to as numerical aperture, or NA, defined as the sine of the half angle of the radiated Gaussian light pattern at the 5% intensity points) and waveguide dimensions, by matching fiber graded index profiles and waveguide step profiles.
Patting call damage the ferrule, which is the metal band at the end of the handle that holds the bristles together.