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Illustration of the interior and exterior rotors of second-order gears with the ferromagnetic stator in between the rotors. Drawings of patent US687292, showing a first-order motor with electromagnets on one of the gears. A magnetic gear resembles the traditional mechanical gear in geometry and function, using magnets instead of teeth. As two ...
Three-speed sliding-gear non-synchronous transmission Non-synchronous "crash" gearbox; commonly used today in semi-trucks and tractors, and formerly used in automobiles pre-1950s. A non-synchronous transmission, also called a crash gearbox, is a form of manual transmission based on gears that do not use synchronizing mechanisms. They require ...
The first few gears in the geartrain of an Omega Megasonic wristwatch have no teeth; instead, magnetic north and south poles on neighboring gears act like the teeth and trough of spur gears, allowing each gear to drive the next gear in the chain. [7] Such magnetic gears, like spur gears, always have gear ratios consisting of small integers.
Pressure angles. Pressure angle in relation to gear teeth, also known as the angle of obliquity, [1] is the angle between the tooth face and the gear wheel tangent. It is more precisely the angle at a pitch point between the line of pressure (which is normal to the tooth surface) and the plane tangent to the pitch surface.
In most vehicles with a manual transmission, the driver selects gears by manipulating a lever called a gear stick (also called a gearshift, gear lever or shifter). In most automobiles, the gear stick is located on the floor between the driver and front passenger, but some cars have a gear stick that is mounted to the steering column or center ...
Float shifting can reduce clutch wear because it is used so much less (only for starting from a standstill). Conversely, improper engagement of a gear (when the engine and transmission speeds aren't matched) can cause wear on the synchros and lockouts, and damage the gears by physically grinding them together due to a difference in speed.
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Cycloidal gears are used in clock and watch making, for three reasons. 1. To reduce friction, watch and clock movements require teeth and pinion leaves to be polished. Cycloidal gears can be designed so that the pinions have flat surfaces. This makes them easier to polish without adversely changing their profile. 2.