Safety chain \Safety chain\
(a) (Railroads) A normally slack chain for preventing
excessive movement between a truck and a car body in
sluing.
(b) An auxiliary watch chain, secured to the clothes, usually
out of sight, to prevent stealing of the watch.
(c) A chain of sheet metal links with an elongated hole
through each broad end, made up by doubling the first
link on itself, slipping the next link through and
doubling, and so on.
[Webster 1913 Suppl.]
Safety arch (Arch.), a discharging arch. See under
Discharge, v. t.
Safety belt, a belt made of some buoyant material, or which
is capable of being inflated, so as to enable a person to
float in water; a life preserver.
Safety buoy, a buoy to enable a person to float in water; a
safety belt.
Safety cage (Mach.), a cage for an elevator or mine lift,
having appliances to prevent it from dropping if the
lifting rope should break.
Safety lamp. (Mining) See under Lamp.
Safety match, a match which can be ignited only on a
surface specially prepared for the purpose.
Safety pin, a pin made in the form of a clasp, with a guard
covering its point so that it will not prick the wearer.
Safety plug. See Fusible plug, under Fusible.
Safety switch. See Switch.
Safety touchdown (Football), the act or result of a
player's touching to the ground behind his own goal line a
ball which received its last impulse from a man on his own
side; -- distinguished from touchback. See Touchdown.
Same as safety
Safety tube (Chem.), a tube to prevent explosion, or to
control delivery of gases by an automatic valvular
connection with the outer air; especially, a bent funnel
tube with bulbs for adding those reagents which produce
unpleasant fumes or violent effervescence.
Safety valve, a valve which is held shut by a spring or
weight and opens automatically to permit the escape of
steam, or confined gas, water, etc., from a boiler, or
other vessel, when the pressure becomes too great for
safety; also, sometimes, a similar valve opening inward to
admit air to a vessel in which the pressure is less than
that of the atmosphere, to prevent collapse.
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Lamp \Lamp\ (l[a^]mp), n. [F. lampe, L. lampas, -adis, fr. Gr.
?, ?, torch, fr. ? to give light, to shine. Cf. Lampad,
Lantern.]
1. A light-producing vessel, device, instrument or apparatus;
formerly referring especially to a vessel with a wick used
for the combustion of oil or other inflammable liquid, for
the purpose of producing artificial light; also, a similar
device using a gas as the combustible fuel; now referring
mainly to an electric lamp. See sense [3].
[1913 Webster +PJC]
2. Figuratively, anything which enlightens intellectually or
morally; anything regarded metaphorically a performing the
uses of a lamp.
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Thy word is a lamp unto my feet, and a light unto my
path. --Ps. cxix.
105.
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Ages elapsed ere Homer's lamp appeared. --Cowper.
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3. (Elec.) A device or mechanism for producing light by
electricity, usually having a glass bulb or tube
containing the light-emitting element. Most lamps belong
to one of two categories, the Incandescent lamp (See
under Incandescent) or the fluorescent lamp. However,
see also arc lamp, below.
[1913 Webster +PJC]
4. A device that emits radiant energy in the form of heat,
infrared, or ultraviolet rays; as, a heat lamp.
[PJC]
Aeolipile lamp, a hollow ball of copper containing alcohol
which is converted into vapor by a lamp beneath, so as to
make a powerful blowpipe flame when the vapor is ignited.
--Weale.
Arc lamp (Elec.), a form of lamp in which the voltaic arc
is used as the source of light.
D["e]bereiner's lamp, an apparatus for the instantaneous
production of a flame by the spontaneous ignition of a jet
of hydrogen on being led over platinum sponge; -- named
after the German chemist D["o]bereiner, who invented it.
Called also philosopher's lamp.
Flameless lamp, an aphlogistic lamp.
Lamp burner, the part of a lamp where the wick is exposed
and ignited. --Knight.
Lamp fount, a reservoir for oil, in a lamp.
Lamp jack. See 2d Jack, n., 4
(l) &
(n) .
Lamp shade, a screen, as of paper, glass, or tin, for
softening or obstructing the light of a lamp.
Lamp shell (Zool.), any brachiopod shell of the genus
Terebratula and allied genera. The name refers to the
shape, which is like that of an antique lamp. See
Terebratula.
Safety lamp, a miner's lamp in which the flame is
surrounded by fine wire gauze, preventing the kindling of
dangerous explosive gases; -- called also, from Sir
Humphry Davy the inventor, Davy lamp.
To smell of the lamp, to bear marks of great study and
labor, as a literary composition.
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