灯笼式小齿轮
针轮小齿轮
滚柱小齿轮

[ noun ]
a small pinion having cylindrical bars instead of teeth, used chiefly in inexpensive clocks
<noun.artifact>

Pinion \Pin"ion\, n. [OF. pignon a pen, F., gable, pinion (in
sense 5); cf. Sp. pi[~n]on pinion; fr. L. pinna pinnacle,
feather, wing. See {Pin} a peg, and cf. {Pen} a feather,
{Pennat}, {Pennon}.]
1. A feather; a quill. --Shak.

2. A wing, literal or figurative.

Swift on his sooty pinions flits the gnome. --Pope.

3. The joint of bird's wing most remote from the body.
--Johnson.

4. A fetter for the arm. --Ainsworth.

5. (Mech.) A cogwheel with a small number of teeth, or
leaves, adapted to engage with a larger wheel, or rack
(see {Rack}); esp., such a wheel having its leaves formed
of the substance of the arbor or spindle which is its
axis.

{Lantern pinion}. See under {Lantern}.

{Pinion wire}, wire fluted longitudinally, for making the
pinions of clocks and watches. It is formed by being drawn
through holes of the shape required for the leaves or
teeth of the pinions.


Lantern \Lan"tern\ (l[a^]n"t[~e]rn), n. [F. lanterne, L.
lanterna, laterna, from Gr. lampth`r light, torch. See
{Lamp}.]
1. Something inclosing a light, and protecting it from wind,
rain, etc.; -- sometimes portable, as a closed vessel or
case of horn, perforated tin, glass, oiled paper, or other
material, having a lamp or candle within; sometimes fixed,
as the glazed inclosure of a street light, or of a
lighthouse light.

2. (Arch.)
(a) An open structure of light material set upon a roof,
to give light and air to the interior.
(b) A cage or open chamber of rich architecture, open
below into the building or tower which it crowns.
(c) A smaller and secondary cupola crowning a larger one,
for ornament, or to admit light; such as the lantern
of the cupola of the Capitol at Washington, or that of
the Florence cathedral.

3. (Mach.) A lantern pinion or trundle wheel. See {Lantern
pinion} (below).

4. (Steam Engine) 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}.

5. (Founding) A perforated barrel to form a core upon.

6. (Zo["o]l.) See {Aristotle's lantern}.

Note: Fig. 1 represents a hand lantern; fig. 2, an arm
lantern; fig. 3, a breast lantern; -- so named from the
positions in which they are carried.

{Dark lantern}, a lantern with a single opening, which may be
closed so as to conceal the light; -- called also
{bull's-eye}.

{Lantern jaws}, long, thin jaws; hence, a thin visage.

{Lantern pinion}, {Lantern wheel} (Mach.), a kind of pinion
or wheel having cylindrical bars or trundles, instead of
teeth, inserted at their ends in two parallel disks or
plates; -- so called as resembling a lantern in shape; --
called also {wallower}, or {trundle}.

{Lantern shell} (Zo["o]l.), any translucent, marine, bivalve
shell of the genus {Anatina}, and allied genera.

{Magic lantern}, an optical instrument consisting of a case
inclosing a light, and having suitable lenses in a lateral
tube, for throwing upon a screen, in a darkened room or
the like, greatly magnified pictures from slides placed in
the focus of the outer lens.