Safety chain

Safety arch — a discharging arch.

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 — a cage for an elevator or mine lift, having appliances to prevent it from dropping if the lifting rope should break.

Safety lamp — 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 — 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 — 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.