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from the high-pressure cylinder before it enters the low-pressure cylinder, in a compound engine.

h two arms that are pivoted together at one end, and a graduated arc, -- used by military engineers for measuring and laying off angles of fortifications.

h the puffing bellows plies, And draws and blows reciprocating air. Dryden. Reciprocating engine, a steam, air, or gas engine, etc., in which the piston moves back and forth; -- in distinction from a rotary engine, in which the piston travels continuously in one direction in a circular path. -- Reciprocating motion (M…

o make a preliminary examination or survey of; esp., to survey with a view to military or engineering operations.

A device used in connection with hot-air engines, gas-burning furnaces, etc., in which the incoming air or gas is heated by being brought into contact with masses of iron, brick, etc., which have been previously heated by the outgoing, or escaping, hot air or gas.

hairspring, and thus regulates the vibrations of the balance. (b) The governor of a steam engine. (c) A valve for controlling the admission of steam to the steam chest, in a locomotive.

In a variable expansion central-valve engine, a small auxiliary engine for automatically adjusting the steam distribution to the load on the main engine. [Webster 1913 Suppl.]

s thereat gan to repine. Spenser. What if the head, the eye, or ear repined To serve mere engines to the ruling mind Pope.

ow and the body at an angle of 45°, and is held as in the illustration. -- To reverse an engine or a machine, to cause it to perform its revolutions or action in the opposite direction.

Serving to effect reversal, as of motion; capable of being reversed. Reversing engine, a steam engine having a reversing gear by means of which it can be made to run in either direction at will. -- Reversing gear (Mach.), gear for reversing the direction of rotation at will.

An engine of war used in the Middle Ages, consisting of a protected elevated staging on wheels, and armed in front with pikes. It was (after the 14th century) furnished with small cannon.

a & n. from Ring, v. Ringing engine, a simple form of pile driver in which the monkey is lifted by men pulling on ropes.

or; a boil. Lev. xiii. 10. Rising main (Waterworks), the pipe through which water from an engine is delivered to an elevated reservoir.

A military engine formerly used for throwing darts and stones.

ich it receives and communicates reciprocating motion, as in the valve gear of some steam engines; -- called also rocker, rocking shaft, and way shaft.

to, or resembling, the motion of a wheel on its axis; rotatory; as, rotary motion. Rotary engine, steam engine in which the continuous rotation of the shaft is produced by the direct action of the steam upon rotating devices which serve as pistons, instead of being derived from a reciprocating motion, as in the ordinar…

ocity of the sun must cause an equatorial rise of the solar atmosphere. Siemens. Rotative engine, a steam engine in which the reciprocating motion of the piston is transformed into a continuous rotary motion, as by means of a connecting rod, a working beam and crank, or an oscillating cylinder.

A house for locomotive engines, built circularly around a turntable.

To continue in operation; to be kept in action or motion; as, this engine runs night and day; the mill runs six days in the week. When we desire anything, our minds run wholly on the good circumstances of it; when it is obtained, our minds run wholly on the bad ones. Swift.

pelling the exhaust gases from the cylinder by some special means, as, in many four-cycle engines, by utilizing the momentum of the exhaust gases in a long exhaust pipe.