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This illustration shows an example of a bevel gear.

Bevel (gear)

This illustration shows an example of a bevel gear.

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

Gearing

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

using a mechanical system of gears or belts and pulleys to increase or decrease shaft speed. Power losses from friction are inherent in any gearing system.

Change Speed Gearing

using a mechanical system of gears or belts and pulleys to increase or decrease shaft speed. Power losses…

Equipped with or connected by gears or having gears engaged

Mechanical Gearing

Equipped with or connected by gears or having gears engaged

Section of Gray & Davis generator with ignition distributor gearing (shaft drive).

Gray and Davis Generator

Section of Gray & Davis generator with ignition distributor gearing (shaft drive).

Helical gearing is a modification of ordinary toothed gearing in which the pitch surfaces may be cylinders or cones (as in spur or bevel gearing); but the teeth intersect the pitch surfaces in helical lines. These wheels work much more smoothly and provide more resilience than ordinary gearing.

Helical Gearing

Helical gearing is a modification of ordinary toothed gearing in which the pitch surfaces may be cylinders…

Righthand spiral gears

Righthand Spiral Gears

Righthand spiral gears

Screw-and-Worm gearing is a type of gearing in which the velocity ratio is independent of the radii of the pitch surfaces, the teeth of the wheels essentially being portions of screw surfaces. This kind of gearing is used in speed-reducing arrangements.

Screw-and-Worm Gearing

Screw-and-Worm gearing is a type of gearing in which the velocity ratio is independent of the radii…

"a, scroll-wheel, intermeshing with the pinion b, which, sliding by a feather on the shaft, c, imparts a gradually decreasing velocity to the latter as b is moved toward the center of a." -Whitney, 1911

Scroll Wheel

"a, scroll-wheel, intermeshing with the pinion b, which, sliding by a feather on the shaft, c, imparts…

This illustration shows an example of a skew bevel gear.

Skew Bevel (gear)

This illustration shows an example of a skew bevel gear.