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Definition of piston
Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of piston is as below...
Piston
(n.) A
sliding
piece which
either
is moved by, or moves
against,
fluid
pressure.
It
usually
consists
of a short
cylinder
fitting
within
a
cylindrical
vessel
along which it
moves,
back and
forth.
It is used in steam
engines
to
receive
motion
from the
steam,
and in pumps to
transmit
motion
to a
fluid;
also for other
purposes..
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Pulsometer
::
Pulsometer
(n.) A
device,
with
valves,
for
raising
water by
steam,
partly
by
atmospheric
pressure,
and
partly
by the
direct
action
of the steam on the
water,
without
the
intervention
of a
piston;
-- also
called
vacuum
pump..
Crosshead
::
Crosshead
(n.) A beam or bar
across
the head or end of a rod, etc., or a block
attached
to it and
carrying
a
knuckle
pin; as the solid
crosspiece
running
between
parallel
slides,
which
receives
motion
from the
piston
of a steam
engine
and
imparts
it to the
connecting
rod, which is
hinged
to the
crosshead..
Spider
::
Spider
(n.) A
skeleton,
or
frame,
having
radiating
arms or
members,
often
connected
by
crosspieces;
as, a
casting
forming
the hub and
spokes
to which the rim of a fly wheel or large gear is
bolted;
the body of a
piston
head; a frame for
strengthening
a core or mold for a
casting,
etc..
Piston
::
Piston
(n.) A
sliding
piece which
either
is moved by, or moves
against,
fluid
pressure.
It
usually
consists
of a short
cylinder
fitting
within
a
cylindrical
vessel
along which it
moves,
back and
forth.
It is used in steam
engines
to
receive
motion
from the
steam,
and in pumps to
transmit
motion
to a
fluid;
also for other
purposes..
Expansion
::
Expansion
(n.) 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
piston..
Trunk
::
Trunk (n.) A large pipe
forming
the
piston
rod of a steam
engine,
of
sufficient
diameter
to allow one end of the
connecting
rod to be
attached
to the
crank,
and the other end to pass
within
the pipe
directly
to the
piston,
thus
making
the
engine
more
compact..
Trumpet
::
Trumpet
(n.) A wind
instrument
of great
antiquity,
much used in war and
military
exercises,
and of great value in the
orchestra.
In
consists
of a long
metallic
tube,
curved
(once or
twice)
into a
convenient
shape,
and
ending
in a bell. Its scale in the lower
octaves
is
limited
to the first
natural
harmonics;
but there are
modern
trumpets
capable,
by means of
valves
or
pistons,
of
producing
every tone
within
their
compass,
although
at the
expense
of the true
ringing
quality
of
tone..
Bucket
::
Bucket
(n.) The
valved
piston
of a
lifting
pump.
Inboard
::
Inboard
(a. & adv.) From
without
inward;
toward
the
inside;
as, the
inboard
stroke
of a steam
engine
piston,
the
inward
or
return
stroke..
Throw
::
Throw (n.) The
extreme
movement
given to a
sliding
or
vibrating
reciprocating
piece by a cam,
crank,
eccentric,
or the like;
travel;
stroke;
as, the throw of a slide
valve.
Also,
frequently,
the
length
of the
radius
of a
crank,
or the
eccentricity
of an
eccentric;
as, the throw of the crank of a steam
engine
is equal to half the
stroke
of the
piston..
Beam
::
Beam (n.) A heavy iron lever
having
an
oscillating
motion
on a
central
axis, one end of which is
connected
with the
piston
rod from which it
receives
motion,
and the other with the crank of the wheel
shaft;
--
called
also
working
beam or
walking
beam..
Cornets-a-piston
::
Cornets-a-piston
(pl. ) of
Cornet-a-pisto.
Backlash
::
Backlash
(n.) The
distance
through
which one part of
connected
machinery,
as a
wheel,
piston,
or
screw,
can be moved
without
moving
the
connected
parts,
resulting
from
looseness
in
fitting
or from wear; also, the
jarring
or
reflex
motion
caused
in badly
fitting
machinery
by
irregularities
in
velocity
or a
reverse
of
motion..
Pallet
::
Pallet
(n.) One of the
series
of disks or
pistons
in the chain pump.
Cylinder
::
Cylinder
(n.) The
chamber
of a steam
engine
in which the
piston
is moved by the force of
steam.
Bottom
::
Bottom
(v. i.) To reach or
impinge
against
the
bottom,
so as to
impede
free
action,
as when the point of a cog
strikes
the
bottom
of a space
between
two other cogs, or a
piston
the end of a
cylinder..
Lead
::
Lead (n.) The width of port
opening
which is
uncovered
by the
valve,
for the
admission
or
release
of
steam,
at the
instant
when the
piston
is at end of its
stroke..
Stroke
::
Stroke
(v. t.) The
movement,
in
either
direction,
of the
piston
plunger,
piston
rod,
crosshead,
etc., as of a steam
engine
or a pump, in which these parts have a
reciprocating
motion;
as, the
forward
stroke
of a
piston;
also, the
entire
distance
passed
through,
as by a
piston,
in such a
movement;
as, the
piston
is at half
stroke..
Play
::
Play (n.)
Motion;
movement,
regular
or
irregular;
as, the play of a wheel or
piston;
hence,
also, room for
motion;
free and easy
action..
Pack
::
Pack (n.) To
render
impervious,
as by
filling
or
surrounding
with
suitable
material,
or to fit or
adjust
so as to move
without
giving
passage
to air,
water,
or
steam;
as, to pack a
joint;
to pack the
piston
of a steam
engine..
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