The Gears ClipArt gallery provides 31 illustrations of toothed wheel and axel combinations. Gears can provide mechanical advantage in much the same way as a wheel and axel does.

A clock is run by wheels. Each wheel turns another to keep the clock running.

Wheels of a Clock

A clock is run by wheels. Each wheel turns another to keep the clock running.

"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…

A wheel with cogs or teeth at right angles to its plane.

Crown-wheel

A wheel with cogs or teeth at right angles to its plane.

Gears used in an older model car. The sprocket gear (far left) carries three bevel pinions on its three radii. The pinions connect to wheels on either side with the wheels attached at the inner ends of the divided axle shaft (middle).

Gear Differentials

Gears used in an older model car. The sprocket gear (far left) carries three bevel pinions on its three…

"Epicycloidal teeth, teeth for gearing cut in the form of an epicycloid." -Whitney, 1911

Epicycloidal Teeth

"Epicycloidal teeth, teeth for gearing cut in the form of an epicycloid." -Whitney, 1911

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…

"Epicycloidal wheel, 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 about the center of the latter. It is used for converting circular into alternate motion, or alternate into circular." -Whitney, 1911

Epicycloidal Wheel

"Epicycloidal wheel, a wheel or ring fixed to a framework, toothed on its inner side, and having in…

As its name entails, this gear is useful at balancing out automobiles. This gear was employed often at the turn of the twentieth century. The upper image shows a cross section of the gear, the lower a top-down view.

Balance Gear

As its name entails, this gear is useful at balancing out automobiles. This gear was employed often…

"For sprockets of different diameters, small rings D are used, of different diameters. The nut C is screwed on and off by a wrench; it has grooves, in order to get rid of the turnings that fall on the threads of the studs." &mdash;Grimshaw, 1902

Bicycle Sprockets Gear

"For sprockets of different diameters, small rings D are used, of different diameters. The nut C is…

A form of gears that used to be employed for tricycles. The studs (AA) are set into the sprockets and turn on their own axes. They turn only when either of the wheels causes rotating (the other wheels are attached to B and C).

Differential Gear

A form of gears that used to be employed for tricycles. The studs (AA) are set into the sprockets and…

A train of wheels for transmitting and varying motion in machinery.

Gearing

A train of wheels for transmitting and varying motion in machinery.

"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…

A pinion and spur gear meshed together.

Gears

A pinion and spur gear meshed together.

"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…

The exterior wheel of the sun and planet motion of gears.

Planet Wheel

The exterior wheel of the sun and planet motion of gears.

A gear system with a rack gear and small pinion gear. Used to conovert circular motion to rectilinear motion.

Rack and Pinion Gears

A gear system with a rack gear and small pinion gear. Used to conovert circular motion to rectilinear…

A gear system with a rack gear and worm gear. Used to conovert circular motion to rectilinear motion.

Rack and Worm Gears

A gear system with a rack gear and worm gear. Used to conovert circular motion to rectilinear motion.

A wheel furnished with projecting pins on the rim, which fit into the links of a chain.

Rag-wheel

A wheel furnished with projecting pins on the rim, which fit into the links of a chain.

"In some of the cheap American alarm clocks there is used a simple ratchet&mdash;wheel which has the double advantage that it is noiseless, and is operative in every position." &mdash;Grimshaw, 1902

Noiseless Clock Ratchet

"In some of the cheap American alarm clocks there is used a simple ratchet—wheel which has the…

"A circular wheel, with teeth on the circumference, by which it can be moved or its motion stayed." &mdash; Williams, 1889

Ratchet-wheel

"A circular wheel, with teeth on the circumference, by which it can be moved or its motion stayed."…

Righthand spiral gears

Righthand Spiral Gears

Righthand spiral gears

"The design is to produce a continued stream, by simply turning it into a crank, thus converting the piston into cog-wheels and the vertical motion into a rotary one." -Comstock 1850

Rotary Pump

"The design is to produce a continued stream, by simply turning it into a crank, thus converting the…

A sprocket and chain.

Sprocket

A sprocket and chain.

A sprocket and chain.

Sprocket

A sprocket and chain.

A sprocket and chain.

Sprocket

A sprocket and chain.

A sprocket and chain.

Sprocket

A sprocket and chain.

"A wheel having teeth projecting radially from the circumference." &mdash; Williams, 1889

Spur-wheel

"A wheel having teeth projecting radially from the circumference." — Williams, 1889

A wheel having teeth or cogs, used in ransmitting motion by enguaging the cogs of another similiar wheel or a rack.

Cog Wheel

A wheel having teeth or cogs, used in ransmitting motion by enguaging the cogs of another similiar wheel…

A wheel having recesses into which cogs or another wheel may be inserted, or into which cogs may be driven.

Core Wheel

A wheel having recesses into which cogs or another wheel may be inserted, or into which cogs may be…

Lefthand single thread worm and worm wheel.

Worm And Worm Wheel

Lefthand single thread worm and worm wheel.

Righthand single thread worm and worm wheel.

Worm And Worm Wheel

Righthand single thread worm and worm wheel.