Found 1 items, similar to Expansion gear.
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Definition: Expansion gear
(g[=e]r), n. [OE. gere, ger, AS. gearwe clothing,
adornment, armor, fr. gearo, gearu, ready, yare; akin to OHG.
garaw[=i], garw[=i] ornament, dress. See Yare
, and cf.
1. Clothing; garments; ornaments.
Array thyself in thy most gorgeous gear. --Spenser.
2. Goods; property; household stuff. --Chaucer.
Homely gear and common ware. --Robynson
3. Whatever is prepared for use or wear; manufactured stuff
Clad in a vesture of unknown gear. --Spenser.
4. The harness of horses or cattle; trapping.
5. Warlike accouterments. [Scot.] --Jamieson.
6. Manner; custom; behavior. [Obs.] --Chaucer.
7. Business matters; affairs; concern. [Obs.]
Thus go they both together to their gear. --Spenser.
(a) A toothed wheel, or cogwheel; as, a spur gear, or a
bevel gear; also, toothed wheels, collectively.
(b) An apparatus for performing a special function;
gearing; as, the feed gear of a lathe.
(c) Engagement of parts with each other; as, in gear; out
9. pl. (Naut.) See 1st Jeer
10. Anything worthless; stuff; nonsense; rubbish. [Obs. or
Prov. Eng.] --Wright.
That servant of his that confessed and uttered this
gear was an honest man. --Latimer.
. See Bevel gear
, a mortise gear, or its skeleton. See Mortise wheel
, under Mortise
(Steam Engine), the arrangement of parts for
cutting off steam at a certain part of the stroke, so as
to leave it to act upon the piston expansively; the
cut-off. See under Expansion
. See Feed motion
, under Feed
, a machine or tool for forming the teeth of
gear wheels by cutting.
, any cogwheel.
. See under Running
To throw in gear
or To throw out of gear
connect or disconnect (wheelwork or couplings, etc.); to
put in, or out of, working relation.
, n. [L. expansio: cf. F. expansion.]
1. The act of expanding or spreading out; the condition of
being expanded; dilation; enlargement.
2. That which is expanded; expanse; extend surface; as, the
expansion of a sheet or of a lake; the expansion was
formed of metal.
The starred expansion of the skies. --Beattie.
3. Space through which anything is expanded; also, pure
Lost in expansion, void and infinite. --Blackmore.
4. (Economics & Commmerce) an increase in the production of
goods and services over time, and in the volume of
business transactions, generally associated with an
increase in employment and an increase in the money
supply. Opposite of contraction
Syn: economic expansion. [1913 Webster +PJC]
5. (Math.) The developed result of an indicated operation;
as, the expansion of (a + b)^2
+ 2ab + b^2
6. (Steam Engine) The operation of steam in a cylinder after
its communication with the boiler has been cut off, by
which it continues to exert pressure upon the moving
7. (Nav. Arch.) The enlargement of the ship mathematically
from a model or drawing to the full or building size, in
the process of construction. --Ham. Nav. Encyc.
Note: Expansion is also used adjectively, as in expansion
joint, expansion gear, etc.
8. an enlarged or extended version of something, such as a
writing or discourse; as, the journal article is an
expansion of the lecture she gave.
9. an expansion joint
. See below. [Colloq. or jargon]
, a curve the co["o]rdinates of which show
the relation between the pressure and volume of expanding
gas or vapor; esp. (Steam engine), that part of an
indicator diagram which shows the declining pressure of
the steam as it expands in the cylinder.
(Steam Engine). a cut-off gear. See Illust.
of Link motion
Automatic expansion gear
or Automatic cut-off
, one that
is regulated by the governor, and varies the supply of
steam to the engine with the demand for power.
Fixed expansion gear
, or Fixed cut-off
, one that always
operates at the same fixed point of the stroke.
, or Expansion coupling
(Mech. & Engin.),
a yielding joint or coupling for so uniting parts of a
machine or structure that expansion, as by heat, is
prevented from causing injurious strains; as:
(a) A slide or set of rollers, at the end of bridge truss,
to support it but allow end play.
(b) A telescopic joint in a steam pipe, to permit one part
of the pipe to slide within the other.
(c) A clamp for holding a locomotive frame to the boiler
while allowing lengthwise motion.
(d) a strip of compressible material placed at intervals
between blocks of poured concrete, as in roads or
(Steam Engine), a cut-off valve, to shut
off steam from the cylinder before the end of each stroke.