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A rectangular piece fitting grooves like key seats in a hub and a shaft, so that while the one may slide endwise on the other, both must revolve together; a feather; also, sometimes, a groove to receive such a rectangular piece.

A long bar; a pole; a shaft; a stake.

A shaft, smaller and shorter than the principal one, joining different levels.

A crossbar of wood in a shaft, serving as a step.

In general, a framing in wood or iron which is intended to receive an upright shaft; specif., a block of wood, or a solid platform upon the keelson, supporting the heel of the mast.

on rod of a steam engine, or the plunger of a pump, slides back and forth, or in which a shaft turns. It usually consists of a box or chamber, made by an enlargement of part of the hole, forming a space around the rod or shaft for containing packing which is compressed and made to fill the space closely by means of a s…

A shaft or gallery to drain a mine. [Local, Eng.] Bailey.

ory motion. It consists of a toothed wheel (called the sun wheel), firmly secured to the shaft it is desired to drive, and another wheel (called the planet wheel) secured to the end of a connecting rod. By the motion of the connecting rod, the planet wheel is made to circulate round the central wheel on the shaft, comm…

f the work. Moxon. Swash plate (Mach.), a revolving circular plate, set obliquely on its shaft, and acting as a cam to give a reciprocating motion to a rod in a direction parallel to the shaft.

An instrument for showing at any moment the speed of a revolving shaft, consisting of a delicate revolving conical pendulum which is driven by the shaft, and the action of which by change of speed moves a pointer which indicates the speed on a graduated dial.

c. In the transmitter the motions of the pencil are communicated by levers to two rotary shafts, by which variations in current are produced in two separate circuits. In the receiver these variations are utilized by electromagnetic devices and levers to move a pen as the pencil moves. --Tel`au*tog"ra*phist (#), n.…

two long pieces of wood, extending before a vehicle, between which a horse is hitched; a shaft.

The horse which goes between the thills, or shafts, and supports them; also, the last horse in a team; -- called also thill horse.

rew Steamers), a bearing arranged to receive the thrust or endwise pressure of the screw shaft. -- Thrust plane (Geol.), the surface along which dislocation has taken place in the case of a reversed fault.

A shaft of lightning; a brilliant stream of electricity passing from one part of the heavens to another, or from the clouds to the earth.

r, used in iron works, which is lifted or tilted by projections or wipers on a revolving shaft; a trip hammer.

The journal, or pivot, at the lower end of a revolving shaft or spindle, which rests in a step.

An instrument, usually of metal, consisting of two parts, or long shafts, jointed together at or near one end, or united by an elastic bow, used for handling things, especially hot coals or metals; -- often called a pair of tongs.

An instrument for determining the torque on a shaft, and hence the horse power of an engine, esp. of a marine engine of high power, by measuring the amount of twist of a given length of the shaft. Called also torsimeter, torsiometer, torsometer.

The shaft of a cart. [Prov. Eng.] De Quincey.