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A,trolley is a rail borne vehicle, of lighter weight and construction than a conventional train, designed for the transport of passengers within, close to, or between villages, towns and/or cities, on tracks running primarily on streets. Certain types of cable car are also known as trams.

Trolley Wheel

A,trolley is a rail borne vehicle, of lighter weight and construction than a conventional train, designed…

"The piston rods are furnished with racks, or teeth, and are worked by the toothed wheel a, which is turned backwards and forwards, by the lever and handle b. The exhaustion pipe c, leads to the plate on which the receiver stants. The valves v, n, u, and m, all open upwards." —Comstock, 1850

Air Pump

"The piston rods are furnished with racks, or teeth, and are worked by the toothed wheel a, which is…

"These animals [the Rotifera], called <em>Wheel Animalcules</em>, were formerly included among the Infusoria, but are now classed with the Articulata: they are chiefly known to us by the microscope, the largest being not over a tenth of an inch long, and many of them only one three-hundredth of an inch." &mdash; Goodrich, 1859

Wheel, animalcule

"These animals [the Rotifera], called Wheel Animalcules, were formerly included among the Infusoria,…

The box on a train which contains the bearings for the spindle of an axle, or joural of an axle.

Axle Box

The box on a train which contains the bearings for the spindle of an axle, or joural of an axle.

The box on a train which contains the bearings for the spindle of an axle, or joural of an axle.

Axle Box

The box on a train which contains the bearings for the spindle of an axle, or joural of an axle.

"In this water, instead of passing over, or entirely under the wheel, is delievered in the direction of its centre. This is one of the most common wheels, and is employed where there is not a sufficient fall for the construction of the overshot kind." -Comstock 1850

Breast Wheel

"In this water, instead of passing over, or entirely under the wheel, is delievered in the direction…

"Water enters the wheel halfway up and flows against the slots on the wheel. The wheel rotates with the flow of the water and the stream continues out the bottom of the wheel." &mdash;Quackenbos 1859

Breast Wheel

"Water enters the wheel halfway up and flows against the slots on the wheel. The wheel rotates with…

"A wheel turned by the force of water which is level with its centre." &mdash; Williams, 1889

Breast-wheel

"A wheel turned by the force of water which is level with its centre." — Williams, 1889

Sometimes it is not necessary for an entire wheel to be used. A projection of any kind that can cause an object to move in a circle may be considered a wheel, like in the image given.

Bucket and Crank

Sometimes it is not necessary for an entire wheel to be used. A projection of any kind that can cause…

A machine used for raising anchors on ships.

Capstan

A machine used for raising anchors on ships.

"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." &mdash;Quackenbos 1859

Capstan

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

This trolley wheel is used to hold heavy loading objects like furniture onto trolleys or hand trucks.

Furniture Caster

This trolley wheel is used to hold heavy loading objects like furniture onto trolleys or hand trucks.

"AB is a wheel with a broad rim, or felly. A wine glass partly filled with water is placed on the inner surface of the felly, and the wheel is then made to revolve rapidly round the axle O. If the proper amount of motion be communicated to the wheel, not only will the wine glass keep its place on the felly, but the water also will remain in it..." &mdash;Quackenbos 1859

Centrifugal Force Demonstration

"AB is a wheel with a broad rim, or felly. A wine glass partly filled with water is placed on the inner…

"A centrifugal pump differing from an ordinary centrifugal pumps in one feature only. The water rises through a suction pipe S, which divides so as to enter the pump wheel at the center on each side. The pump disk or wheel is very similar to a turbine wheel. it is keyed on a shaft driven by a belt on a fast and loose pulley arrangement at P. The water rotating in the pump disk presses outwards, and if the speed is sufficient a continuous flow is maintained through the pump and into the discharge pipe D. The special feature in this pump is that the water, discharged by the pump disk with a whirling velocity of not inconsiderable magnitude, is allowed to continue rotation in a chamber somewhat larger than the pump. The use of this whirlpool chamber was first suggested by Professor James Thomson." &mdash; Encyclopedia Britannica, 1893

Centrifugal Pump

"A centrifugal pump differing from an ordinary centrifugal pumps in one feature only. The water rises…

"Used to raise water with a continuous chain with evenly spaced circular plates. The plates exactly fit a hollow tube, G and H. When the wheels I, J are turned, they move the chain which carries water up the pipe into the collection reservoir." &mdash;Quackenbos 1859

Chain Pump

"Used to raise water with a continuous chain with evenly spaced circular plates. The plates exactly…

"The chain-pump consists of a tube or cylinder, the lower part of which is immersed in a well or reservoir, and the upper part enters the bottom of a cistern into which the water is to be raised. A chain is carried round a wheel at the top, and is furnished at equal distances with movable bottoms, which fit water-tight in the tube. As the wheel revolves, they successively enter the tube, and carry the water up before them, which is discharged into the cistern at the top of the tube." &mdash; Wells, 1857

Chain-Pump

"The chain-pump consists of a tube or cylinder, the lower part of which is immersed in a well or reservoir,…

An office chair, or desk chair, is a type of chair that is designed for use at a desk in an office. It is generally comfortable and adjustable and can swivel 360 degrees.

Adjustable Office Chair

An office chair, or desk chair, is a type of chair that is designed for use at a desk in an office.…

"Arms and a chariot are here assigned to June through not properly a warlike goddess. The idea itself, of giving such appendages to Diety, seems borrowed from the habits of the heroic age. The following delineation of a chariot is from an ancient one preserved in the Vatican; <em>Hoc regnum dea</em> etc." &mdash; Anthon, 1891

Chariot

"Arms and a chariot are here assigned to June through not properly a warlike goddess. The idea itself,…

"A small projection in machinery, used to impart motion. <em>C. wheel</em>, a wheel having cogs on its circumfrence." &mdash; Williams, 1889

Cog-wheel

"A small projection in machinery, used to impart motion. C. wheel, a wheel having cogs on its…

"The simplest idea of a crank is that of a handle to a wheel; its action is familiarly illustrated in the process of drawing water from a well: the bent handle attached to the wheel is first pushed out, then pulled in the opposite direction, and thus a continued rotatory motion is produced upon an axle. The application of this principle to the steam engine, and the variations of pressure on the crank of a steam enginre, may be conveniently illustrated by curves." &mdash;Comstock, 1850

Crank

"The simplest idea of a crank is that of a handle to a wheel; its action is familiarly illustrated in…

A pulley with a convex rim, much used where various cases belts are in danger of slipping off.

Crown Pulley

A pulley with a convex rim, much used where various cases belts are in danger of slipping off.

"Harness hides are washed by some means in pure water, the most convenient and generally adopted method being to place them in the dash wheel, in which they revolve and tumble about whilst fresh water is continually being poured on them within the revolving wheel." &mdash;The Encyclopedia Britannica, 1910

Dash Wheel

"Harness hides are washed by some means in pure water, the most convenient and generally adopted method…

The method of filling the ordered army draft during the Civil War.

The Drafting Wheel

The method of filling the ordered army draft during the Civil War.

A fertilizer drill, which distributes fertilizer in a row at the desired quantity.

Fertilizer drill

A fertilizer drill, which distributes fertilizer in a row at the desired quantity.

A wheel that communicates motion; the wheel of a locomotive, which, adhering to the track, communicates the power of the steam-engine to the vehicle.

Driving-wheel

A wheel that communicates motion; the wheel of a locomotive, which, adhering to the track, communicates…

"The threads of the screw act upon the teeth cut into the wheel. As the screw turns, each thread catches a tooth on the wheel to rotate the wheel indefinitely." &mdash;Quackenbos 1859

Endless Screw

"The threads of the screw act upon the teeth cut into the wheel. As the screw turns, each thread catches…

A wheel or ring fixed to a framework, toothed on its inner side, and having in gear with it another toothed wheel of half the diameter of the first, fitted so as to revolve around the center of the latter.

Epicycloidal Wheel

A wheel or ring fixed to a framework, toothed on its inner side, and having in gear with it another…

This fan features a hamster type wheel in the middle for moving air or gases. It has a fan wheel with several blades which are mounted on a hub.

Centrifugal Fan

This fan features a hamster type wheel in the middle for moving air or gases. It has a fan wheel with…

"A pulley is a wheel having a grooved rim for carrying a rope or other line, and tuning on an axis carried in a frame, called a pulley block. The pulley is fixed if the block is stationary." &mdash; Avery, 1895

Fixed Pulley

"A pulley is a wheel having a grooved rim for carrying a rope or other line, and tuning on an axis carried…

A pulley with a sheave having its perimeter a rectangular or nearly rectangular groove. Used for transmitting power by ropes or bands.

Flat Rope Pulley

A pulley with a sheave having its perimeter a rectangular or nearly rectangular groove. Used for transmitting…

Roman personification of good fortune

Fortuna

Roman personification of good fortune

"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." &mdash;Hallock 1905

Train

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

A combination of wheels and axles, called a train. The wheel that is moving with a belt is called a driven wheel or follower. The wheel which causes the follower to move is the driver.`

Gear Train

A combination of wheels and axles, called a train. The wheel that is moving with a belt is called a…

Mechanism that connects the coupler to the frame of the car. In model railroading, the coupler mounting box is often so-named.

Draft Gear

Mechanism that connects the coupler to the frame of the car. In model railroading, the coupler mounting…

"It is found preferable, therefore, when a great difference of velocity is required, to use a combination of wheels, of moderate size. In the following figure, three wheels are seen thusly connected." &mdash; Goodrich, 1844

Gears

"It is found preferable, therefore, when a great difference of velocity is required, to use a combination…

"GIN-BLOCK. A simple form of tackle-block with a single wheel, over which a rope runs. It has a hook by which it swings from the jib of a crane or the sheer of a gin." -Whitney, 1911

Gin-Block

"GIN-BLOCK. A simple form of tackle-block with a single wheel, over which a rope runs. It has a hook…

"E represents the scape-wheel turning in a minute, and e its pinion, which is driven by the wheel D having a pinion d driven by the wheel C, which we may suppose to turn in an hour. The arbors of the scape-wheel and hour-wheel are distinct, their pivots-meeting in a bush fixed somewhere between the wheels. The pivots of the wheel, D are set in the frame AP, which rides on the arbors of the hour-wheel and scape-wheel, or on another short arbor between them. The hour-wheel also drives another wheel G, which again drives the pinion f on the arbor which carries the two arms f A, f B; and on the same arbor is set a fly with a ratchet, like a common striking fly, and the numbers of the teeth are so arranged that the fly will turn once for each turn of the scapewheel. The ends of the remontoire arms f A, f B are capable of alternately passing the notches cut half through the arbor of the scape-wheel, as those notches successively come into the proper position at the end of every half minute; as soon as that happens the-hour-wheel raises the movable wheel D and its frame through a small angle; but nevertheless, that wheel keeps pressing on the scape-wheel as if it were not moving, the point of contact of the wheel C and the pinion d being the fulcrum or center of motion of the level A d P." &mdash; Encyclopedia Britanica, 1893

Gravity Train Remontoire

"E represents the scape-wheel turning in a minute, and e its pinion, which is driven by the wheel D…

Three men at work grinding scissors.

Grinding Hull

Three men at work grinding scissors.

"The sectional form of the guideblade chamber and the wheel and the curves of the wheel vanes and guideblades, when drawn on a plane development of the cylindrical section of the wheel; a, a, a are the sluices for cutting off the water; b, b, are apertures by which the entrance of exit of air is facilitated as the buckets empty and fill." &mdash; Encyclopedia Britannica, 1893

Guideblade Chamber

"The sectional form of the guideblade chamber and the wheel and the curves of the wheel vanes and guideblades,…

"The sectional form of the guideblade chamber and the wheel and the curves of the wheel vanes and guideblades, when drawn on a plane development of the cylindrical section of the wheel; a, a, a are the sluices for cutting off the water; b, b, are apertures by which the entrance of exit of air is facilitated as the buckets empty and fill." &mdash; Encyclopedia Britannica, 1893

Guideblade Chamber

"The sectional form of the guideblade chamber and the wheel and the curves of the wheel vanes and guideblades,…

"The click barrel-ratchet R is set upon another larger ratchet-wheel, with its teeth pointing the opposite way, and its click rT is set in the clock-frame. That ratchet is connected with the great wheel by a spring ss' pressing against the two pins s in the ratchet and s' in the wheel. When you wind up the weight, the click Tr prevents the ratchet from turning back or to the right; and as the spring ss' is kept by the weight in a state of tension equivalent to the weight itself it will drive the wheel to the left for a short distance, when its end s is held fast, with the same force as if that end was pulled forward by the weight; and as the great wheel has to move very little during the short time the clock is winding, the spring will keep the clock going long enough." &mdash; Encyclopedia Britanica, 1893

Harrison's Going-Ratchet

"The click barrel-ratchet R is set upon another larger ratchet-wheel, with its teeth pointing the opposite…

"The plough is composed of two strong iron frames balanced upon four wheels, and crossing each other at their inner ends, thereby decreasing the length of the plough, and, as a matter of course, the breadth of the headland. The rames are raised and lowered in such a manner that the set of ploughs out of work is independent of, and has no tendency to weigh or raise out of the ground." &mdash; Chambers, 1881

Howard's Plough

"The plough is composed of two strong iron frames balanced upon four wheels, and crossing each other…

The central part of a car wheel (or fan or propeller etc) through which the shaft or axle passes

Wheel Hub

The central part of a car wheel (or fan or propeller etc) through which the shaft or axle passes

"Ixion on the Wheel" &mdash; Gayley, 1893

Ixion

"Ixion on the Wheel" — Gayley, 1893

"The modern system of cotton manufacture dates no further back than back 1760. Prior the mechanical inventions of Hargeaves, Arkwright, Crompton and Cartwright, the arts of spinning and weaving were entirely domestic, and the instruments of manipulation much the same as those which had been in use in the East for centuries before." -Lupton

The Spinning Jenny

"The modern system of cotton manufacture dates no further back than back 1760. Prior the mechanical…

"In the ordinary pattern of a lapidary's bench the handle turns in a horizontal plane, where W is the driving-wheel turned by the handle A, and working the pulley P by means of a strap. The pulley is fixed on a vertical spindle, which carries M the disk for slitting or the leaden lap for roughing or polishing. The upper end of this spindle is conical, and rotates in a socket drilled in a horizontal arm of iron which projects from a vertical wooden rod D. A block of wood C fits on to the end of an iron support termed the gim-peg or germ-peg. This support is used to steady the operator's arm when grinding the edges of small stones, and the wooden block, which is fixed by a wedge, is employed for cutting facets at any desired angle, the stone being cemented to the end of a stik S, which is fixed at the requisite angle in one of the holes or notches made in the sides of the socket C." —The Encyclopedia Britannica, 1910

Lapidary's Mill

"In the ordinary pattern of a lapidary's bench the handle turns in a horizontal plane, where W is the…

"The Atwood machine consists of a wheel or pulley, R, over the grooved edge of which are balanced two equal weights suspended by a long silk thread which is both light and strong. The axle of this wheel is preferably supported upon the circumfrences of four friction wheels, r, r, r', r', for greater delicacy of motion. As the thread is so light that its weight may be disregarded, it is evident that the weights will be in equilibrium whatever their position." &mdash; Avery, 1895

Atwood Machine

"The Atwood machine consists of a wheel or pulley, R, over the grooved edge of which are balanced two…

"2 wheels revolving in contact, but in different planes, so as to transfer motion from one plane to another." &mdash; Williams, 1889

Mitre-wheels

"2 wheels revolving in contact, but in different planes, so as to transfer motion from one plane to…

"A pulley is a wheel having a grooved rim for carrying a rope or other line, and turning on an axis carried in a frame, called a pulley block. The pulley is movable if the block moves during the action of the power." &mdash; Avery, 1895

Movable pulley

"A pulley is a wheel having a grooved rim for carrying a rope or other line, and turning on an axis…

"[This illustration] represents a moveable pulley. A is the wheel. One end of the rope is fastened to a support at D, while the power is applied to the other at P." &mdash;Quackenbos 1859

Moveable Pulley

"[This illustration] represents a moveable pulley. A is the wheel. One end of the rope is fastened to…

Roman goddess of divine justice and vengeance

Nemesis

Roman goddess of divine justice and vengeance

Roman goddess of divine justice and vengeance

Nemesis

Roman goddess of divine justice and vengeance

"This wheel of all others, gives the greatest power with the least quantity of water, and is, therefore, generally used when circumstances will permit, or where there is a considerable fall, with a limited quantity of water." -Comstock 1850

Overshot Wheel

"This wheel of all others, gives the greatest power with the least quantity of water, and is, therefore,…

"Wheel consists of flaps in the shape of buckets that are equally spaced. As water flows onto the wheel, the weight of the water in the buckets causes the wheel to rotate and empty the buckets." &mdash;Quackenbos 1859

Overshot Wheel

"Wheel consists of flaps in the shape of buckets that are equally spaced. As water flows onto the wheel,…

An optical instrument which the representatin of actual motion, as in leaping, walking, flying, etc.

Phanakistoscope

An optical instrument which the representatin of actual motion, as in leaping, walking, flying, etc.

"The Romans, an essentially practical nation, largely improved on the plough, adding to it the coulter and mould-board, and occasionally attaching wheels to the beam to prevent the share from going too deep into the earth." &mdash; Chambers, 1881

Plough

"The Romans, an essentially practical nation, largely improved on the plough, adding to it the coulter…

A double-wheeled hand plow.

Hand plow

A double-wheeled hand plow.

An illustration of two forms of Italian potter's wheels.

Pottery Wheels

An illustration of two forms of Italian potter's wheels.

"[The pulley] consists of a wheel with a grooved circumference, over which a rope passes, and an axis or pin, round which the wheel may be made to turn. A represents the block, B the axis, C the wheel." &mdash;Quackenbos 1859

Pulley

"[The pulley] consists of a wheel with a grooved circumference, over which a rope passes, and an axis…

A pulley (also called a block) is a mechanism composed of a wheel (called a sheave) with a groove between two flanges around the wheel's circumference. A rope, cable or belt usually runs inside the groove. 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.

Pulley

A pulley (also called a block) is a mechanism composed of a wheel (called a sheave) with a groove between…