LANCE n.
One of the small paper cases filled with combustible composition, which mark the outlines of a figure. Free lance, in the Middle Ages, and subsequently, a knight or roving soldier, who was free to engage for any state or commander that purchased his services; hence, a person who assails institutions or opinions on his…
LAY SHAFT; LAYSHAFT n.
change gear for an automobile; a cam shaft operated by a two-to-one gear in an internal- combustion engine. It is generally a shaft moving more or less independently of the other parts of a machine, as, in some marine engines, a shaft, driven by a small auxiliary engine, for independently operating the valves of the m…
OIL n.
Any one of a great variety of unctuous combustible substances, not miscible with water; as, olive oil, whale oil, rock oil, etc. They are of animal, vegetable, or mineral origin and of varied composition, and they are variously used for food, for solvents, for anointing, lubrication, illumination, etc. By extension, an…
OTTO CYCLE n.
A four-stroke cycle for internal-combustion engines consisting of the following operations: First stroke, suction into cylinder of explosive charge, as of gas and air; second stroke, compression, ignition, and explosion of this charge; third stroke (the working stroke), expansion of the gases; fourth stroke, expulsion…