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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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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..
Forcer
::
Forcer
(n.) The solid
piston
of a force pump; the
instrument
by which water is
forced
in a pump.
Pallet
::
Pallet
(n.) One of the
series
of disks or
pistons
in the chain pump.
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..
Inboard
::
Inboard
(a. & adv.) From
without
inward;
toward
the
inside;
as, the
inboard
stroke
of a steam
engine
piston,
the
inward
or
return
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..
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..
Indicator
::
Indicator
(n.) An
instrument
which draws a
diagram
showing
the
varying
pressure
in the
cylinder
of an
engine
or pump at every point of the
stroke.
It
consists
of a small
cylinder
communicating
with the
engine
cylinder
and
fitted
with a
piston
which the
varying
pressure
drives
upward
more or less
against
the
resistance
of a
spring.
A lever
imparts
motion
to a
pencil
which
traces
the
diagram
on a card
wrapped
around
a
vertical
drum which is
turned
back and forth by a
string
connected
with the pist
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..
Condenser
::
Condenser
(n.) An
instrument
for
condensing
air or other
elastic
fluids,
consisting
of a
cylinder
having
a
movable
piston
to force the air into a
receiver,
and a valve to
prevent
its
escape..
Chyometer
::
Chyometer
(n.) An
instrument
for
measuring
liquids.
It
consists
of a
piston
moving
in a tube in which is
contained
the
liquid,
the
quantity
expelled
being
indicated
by the
graduation
upon the
piston
rod..
Pump
::
Pump (n.) An
hydraulic
machine,
variously
constructed,
for
raising
or
transferring
fluids,
consisting
essentially
of a
moving
piece or
piston
working
in a
hollow
cylinder
or other
cavity,
with
valves
properly
placed
for
admitting
or
retaining
the fluid as it is drawn or
driven
through
them by the
action
of the
piston..
Lantern
::
Lantern
(n.) A kind of cage
inserted
in a
stuffing
box and
surrounding
a
piston
rod, to
separate
the
packing
into two parts and form a
chamber
between
for the
reception
of
steam,
etc. ; --
called
also
lantern
brass..
Force Pump
::
Force pump () A pump
having
a solid
piston,
or
plunger,
for
drawing
and
forcing
a
liquid,
as
water,
through
the
valves;
in
distinction
from a pump
having
a
bucket,
or
valved
piston..
Excursion
::
Excursion
()
Length
of
stroke,
as of a
piston;
stroke.
[An
awkward
use of the
word.].
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..
Liner
::
Liner (n.) A
lining
within
the
cylinder,
in which the
piston
works and
between
which and the outer shell of the
cylinder
a space is left to form a steam
jacket..
Distribution
::
Distribution
(n.) The steps or
operations
by which steam is
supplied
to and
withdrawn
from the
cylinder
at each
stroke
of the
piston;
viz.,
admission,
suppression
or
cutting
off,
release
or
exhaust,
and
compression
of
exhaust
steam prior to the next
admission..
Cornopean
::
Cornopean
(n.) An
obsolete
name for the
cornet-a-piston.
Clearance
::
Clearance
(n.) The
distance
by which one
object
clears
another,
as the
distance
between
the
piston
and
cylinder
head at the end of a
stroke
in a steam
engine,
or the least
distance
between
the point of a
cogwheel
tooth and the
bottom
of a space
between
teeth of a wheel with which it
engages..
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