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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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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..
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..
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..
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..
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..
Cornets-a-piston
::
Cornets-a-piston
(pl. ) of
Cornet-a-pisto.
Collar
::
Collar
(n.) A ring or round
flange
upon,
surrounding,
or
against
an
object,
and used for
restraining
motion
within
given
limits,
or for
holding
something
to its
place,
or for
hiding
an
opening
around
an
object;
as, a
collar
on a
shaft,
used to
prevent
endwise
motion
of the
shaft;
a
collar
surrounding
a
stovepipe
at the place where it
enters
a wall. The
flanges
of a
piston
and the gland of a
stuffing
box are
sometimes
called
collars..
Bucket
::
Bucket
(n.) The
valved
piston
of a
lifting
pump.
Gasket
::
Gasket
(n.) The
plaited
hemp used for
packing
a
piston,
as of the steam
engine
and its
pumps..
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..
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..
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..
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..
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..
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..
Cornet-a-piston
::
Cornet-a-piston
(n.) A brass wind
instrument,
like the
trumpet,
furnished
with
valves
moved by small
pistons
or
sliding
rods; a
cornopean;
a
cornet..
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..
Plunger
::
Plunger
(n.) A long solid
cylinder,
used,
instead
of a
piston
or
bucket,
as a
forcer
in
pumps..
Packing
::
Packing
(n.) The
substance
in a
stuffing
box,
through
which a
piston
rod
slides..
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