Clipart illustrations of a simple machine, gears. Gears are used by connecting them to an axle, and using the interconnecting cogs to move other gears or parts of a system. Their mechanics are similar to the wheel and axle.

| Clock, Wheels of a A clock is run by wheels. Each wheel turns another to keep the clock running..

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.. | | Cog-wheel “A small projection in machinery, used to impart motion. C. wheel, a wheel having cogs on its circumfrence. ” — Williams, 1889..

. | | Crown-wheel A wheel with cogs or teeth at right angles to its plane…. | Drill, twist bit Twist drill bit..

.. | | Epicycloidal Teeth “Epicycloidal teeth, teeth for gearing cut in the form of an epicycloid. ” -Whitney, 1911… | | 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 around the center of the la.

.. | | Epicycloidal Wheel “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… |Gear, Bicycle Sprockets “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 th.

.. | | Gearing A train of wheels for transmitting and varying motion in machinery…. | | Gears “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…. | | Gears A pinion and spur gear meshed together. ..

. | | Mitre-wheels 2 wheels revolving in contact, but in different planes, so as to transfer motion from one plane to another. ” — Williams, 1889… | | Planet wheel The exterior wheel of the sun and planet motion of gears. .

.. | | Rack and pinion gears A gear system with a rack gear and small pinion 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. … | | Rag-wheel A wheel furnished with projecting pins on the rim, which fit into the links of a chain..

.. | Ratchet, Noiseless Clock “In some of the cheap American alarm clocks there is used a simple ratchet—wheel which has the double advantage that it is noiseless, and is operative in every position. ” —Grimshaw, 1902… | | Ratchet-wheel “A circular wheel, with teeth on the circumference, by which it can be moved or its motion stayed.

” — Williams, 1889… | | Righthand spiral gears Righthand spiral gears… | | Rotary pump “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… | | Sprocket A sprocket and chain….

| | Sprocket A sprocket and chain…. | | Sprocket A sprocket and chain…

. | | Sprocket A sprocket and chain…. | | Spur-wheel “A wheel having teeth projecting radially from the circumference. ” — Williams, 1889.

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