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A transverse bar connecting the naves of the opposite wheels of a carriage.

Axle

A transverse bar connecting the naves of the opposite wheels of a carriage.

The spindle at either end of an axletree.

Shaft Axle

The spindle at either end of an axletree.

A machine used for raising anchors on ships.

Capstan

A machine used for raising anchors on ships.

"The capstan, in universal use, on board of ships, is an axle placed upright, with a head, or drum, A, pierced with holes for the levers B, C, D. The weight is drawn by the rope E, passing two or three times round the axle to prevent its slipping. This is a very powerful and convenient machine. When not in use, the levers are taken out of their places and laid aside, and when great force is required two or three men can push at each lever." —Comstock, 1850

Capstan

"The capstan, in universal use, on board of ships, is an axle placed upright, with a head, or drum,…

"The capstan is a familiar example of this form of wheel and axle. It is used by sailors for warping vessels up to a dock, raising anchors, &c.; and consists of a massive piece of timber, round which a rope passes. This is surmounted by a circular head, perforated with holes, into which, when the instrument is to be used, strong bars, called handspikes, are inserted." —Quackenbos 1859

Capstan

"The capstan is a familiar example of this form of wheel and axle. It is used by sailors for warping…

This figure consists of three pumps, the piston rods of which are jointed to three cranks on a horizontal axle, by means of three connecting rods.

Connected Pumps.

This figure consists of three pumps, the piston rods of which are jointed to three cranks on a horizontal…

"The usual form of crank-axle bearing which has inward-cups and is cup-adjusting. The end of the bracket is split and the cup after adjustment is clamped in position by the clamping screw S. The usual mode of fastening the cranks to the axle is by round cotters C with a flat surface at a slight angle to the axis, thus forming a wedge, which is driven in tight. The small end of the cotter projects through the crank, and is screwed and held in place by a nut. The chain-wheel at the crank-axis is usually detachable fastened to the right-hand crank." — The Encyclopedia Britannica, 1910

Crank-axle Bearing

"The usual form of crank-axle bearing which has inward-cups and is cup-adjusting. The end of the bracket…

"A combination of wheels and axles, as shown, is called a train. The wheel in a train to which motion is imparted from a wheel on another shaft by such means as a belt or gearing, is called the driven wheel or follower; the hweel that imparts the motion is called the driver." —Hallock 1905

Train

"A combination of wheels and axles, as shown, is called a train. The wheel in a train to which motion…

"Langens arrangement is a somewhat similar combination, the cone being made into a bell with perforated top, the edges of the perforation being turned over inwards bb; the bell rests upon the cup aa, the turned over edge cc fitting into a water lute surrounding the central tube kkk, so that whilst the bell is lowered the furnace top is gastight or nearly so. By means of a pair of levers d, d and a counterpoise swung on a horizontal axle at r by means of a winch e, the bell can be raised so that the charge in the cup falls into the furnace, sliding down the inclined surface. Two safety valves x and fg are provided, the latter being ordinarily supported by the pressure of the gases, but falling by its own weight when the gas pressure is relieved by raising the bell, so as to close the top of the gas shaft, the turned-down edges of g fitting into the annular groove oo; h is a small manhole for the introduction of scrapers to clear out flue dust when required." — The Encyclopedia Britannica, 1893

Langen's Collector

"Langens arrangement is a somewhat similar combination, the cone being made into a bell with perforated…

"Langens arrangement is a somewhat similar combination, the cone being made into a bell with perforated top, the edges of the perforation being turned over inwards bb; the bell rests upon the cup aa, the turned over edge cc fitting into a water lute surrounding the central tube kkk, so that whilst the bell is lowered the furnace top is gastight or nearly so. By means of a pair of levers d, d and a counterpoise swung on a horizontal axle at r by means of a winch e, the bell can be raised so that the charge in the cup falls into the furnace, sliding down the inclined surface. Two safety valves x and fg are provided, the latter being ordinarily supported by the pressure of the gases, but falling by its own weight when the gas pressure is relieved by raising the bell, so as to close the top of the gas shaft, the turned-down edges of g fitting into the annular groove oo; h is a small manhole for the introduction of scrapers to clear out flue dust when required." — The Encyclopedia Britannica, 1893

Langen's Collector

"Langens arrangement is a somewhat similar combination, the cone being made into a bell with perforated…

An instrument for making a reduced, enlarged, or exact copy of a plane figure

Pantograph

An instrument for making a reduced, enlarged, or exact copy of a plane figure

A pulley, also called a sheave or a drum, is a mechanism composed of a wheel on an axle or shaft that may have a groove between two flanges around its circumference. A rope, cable, belt, or chain usually runs over the wheel and inside the groove, if present. Pulleys are used to change the direction of an applied force, transmit rotational motion, or realize a mechanical advantage in either a linear or rotational system of motion. Two or more pulleys together are called a block and tackle.

Pulley

A pulley, also called a sheave or a drum, is a mechanism composed of a wheel on an axle or shaft that…

"Side-delivery rake, a horse-rake in which the rake is suspended between the axle of the pair of wheels and a third or caster-wheel trailing at the end of the rake, and placed in a position diagonal to the direction in which the machine moves. By means of suitable mechanism, operated through gearing on the axle, the hay, as fast as it is gathered, is delivered at the side of the rake and deposited on the ground in the form of a windrow." -Whitney, 1911

Side Delivery Rake

"Side-delivery rake, a horse-rake in which the rake is suspended between the axle of the pair of wheels…

"It is apparent by turning the crank, C, the wheel will revolve, for the thread of the screw passes between the cogs of the wheel. By means of an axle, through the centre of this wheel, like the common wheel and axle, this becomes an axceedingly powerful machine, but...is slow." -Comstock 1850

Screw and Wheel

"It is apparent by turning the crank, C, the wheel will revolve, for the thread of the screw passes…

"System of Wheels.—As the wheel and axle is only a modification of the simple lever, so a system of wheels acting on each other, and transmitting the power to the resistance, is only another form of the compound lever. The first wheel a, by means of the teeth, or cogs, around its axle, moved the second wheel, b, with a force equal to that of a lever, the long arm of which extends from the center to the circumference of the wheel, where the power p is suspended, and the short arm from the same center to the ends of the cogs. The dotted line c, passing through the center of the wheel a, shows the position of the lever, as the wheel now stands." —Comstock, 1850

System of Wheels

"System of Wheels.—As the wheel and axle is only a modification of the simple lever, so a system…

A wheel is a circular device that is capable of rotating on its axis, facilitating movement and transportation.

Side View of a Vehicle Wheel

A wheel is a circular device that is capable of rotating on its axis, facilitating movement and transportation.

"[This illustration] shows a third form of the wheel and axle. Here the axle A is vertical, instead of horizontal. A bar inserted in its head, at the extremity of which the hand is applied, takes the place of the wheel." —Quackenbos 1859

Vertical Wheel and Axle

"[This illustration] shows a third form of the wheel and axle. Here the axle A is vertical, instead…

"The wheel and axle consists of a wheel united to a cylinder in such a way that they may turn together on a common axis. It is a modified lever of the first or second class." — Avery, 1895

Wheel and axle

"The wheel and axle consists of a wheel united to a cylinder in such a way that they may turn together…

"The wheel and axle consists of two cylinders of different diameters, rigidly connected, so that they turn together about a common axis." — Hallock, 1905

Wheel and Axle

"The wheel and axle consists of two cylinders of different diameters, rigidly connected, so that they…

"It consists of two wheels, one of which is larger than the other, but the small one passes through the larger, and hence both have a common centre, on which they turn." -Comstock 1850

Wheel and Axle

"It consists of two wheels, one of which is larger than the other, but the small one passes through…

"This figure represents the machine endwise, so as to show in what manner the lever operates. The two weights hanging in opposition to each other, the one on the wheel at a, and the other on the axle at b, act in the same manner as if they were conected by the horizontal lever a b, passing from one to the other, having the common centre, c, as a fulcrum between them." -Comstock 1850

Wheel and Axle

"This figure represents the machine endwise, so as to show in what manner the lever operates. The two…

"To change the direction, it is only necessary that the rope by which the weight is to be raised, should be carried in a line perpendicular to the axis of the machine, sto the place below where the weight lies, and there be let fall over a pulley." -Comstock 1850

Wheel and Axle

"To change the direction, it is only necessary that the rope by which the weight is to be raised, should…

"The wheel and axle consists of a wheel united to a cylinder in such a way that they may turn together on a common axis. It is a modified lever of the first or second class." -Avery 1895

Wheel and Axle with Rope and Bucket

"The wheel and axle consists of a wheel united to a cylinder in such a way that they may turn together…

"Considered as a lever, the fulcrum is at the common axis, while the arms of the lever are the radii of the wheel and of the axle. The usual arrangement is to take ac, the radius of the wheel, as the power arm, and bc , the radius of the axle, as the weight arm." -Avery 1895

Wheel and Axle

"Considered as a lever, the fulcrum is at the common axis, while the arms of the lever are the radii…

"...the mechanical advantage of this machine (wheel and axle) equal the ratio between the radii, diameters, or circumferences of the wheel and of the axle." -Avery 1895

Wheel and Axle with Rope and Bucket

"...the mechanical advantage of this machine (wheel and axle) equal the ratio between the radii, diameters,…

"The wheel and axle is simply a revolving lever of the first kind. One application of the lever can not move a body any great distance; but, by means of the wheel and axle, the action of the lever is continued uninterruptedly." —Quackenbos 1859

Wheel and Axle

"The wheel and axle is simply a revolving lever of the first kind. One application of the lever can…

"Instead of having a rope attached to it, the wheel is often provided with projecting pins, as shown, to which the hand is directly applied." —Quackenbos 1859

Wheel and Axle with Spokes

"Instead of having a rope attached to it, the wheel is often provided with projecting pins, as shown,…

"Fifth wheel, a horizontal plate, bent to form a whole or part of a circle, placed on the forward axle of a carriage. It is designed to support the fore part of the body while allowing it to turn freely in a horizontal plane." Today, the fifth wheel is used in coupling of trailers and towing trucks. -Whitney, 1911

Fifth Wheel

"Fifth wheel, a horizontal plate, bent to form a whole or part of a circle, placed on the forward axle…

"Fifth wheel, a horizontal plate, bent to form a whole or part of a circle, placed on the forward axle of a carriage. It is designed to support the fore part of the body while allowing it to turn freely in a horizontal plane." Today, the fifth wheel is used in coupling of trailers and towing trucks. -Whitney, 1911

Fifth Wheel

"Fifth wheel, a horizontal plate, bent to form a whole or part of a circle, placed on the forward axle…

"A still more common form, much used in drawing water from wells and loaded buckets from mines, is shown [here]. Instead of a wheel, we have here a winch, or handle, attached to the axle." —Quackenbos 1859

Winch

"A still more common form, much used in drawing water from wells and loaded buckets from mines, is shown…

"Windlass.—The common windlass for drawing water is another modification of the wheel and axle. The winch, or crank, by which it is turned, is moved around by the hand, and there is no difference in the principle, whether a whole wheel is turned, or a single spoke. The winch, therefore, answers to the wheel, while the rope is taken up, and the weight raised by the axle, as already described." —Comstock, 1850

Windlass

"Windlass.—The common windlass for drawing water is another modification of the wheel and axle.…