Orville and Wilbur Wright owned a bicycle shop in Dayton,Ohio.Although they had not gone to school to learn about airplanes or engineering,they were good mechanics.By repairing bicycles,they had learned how gears and pulleys worked.They also learned to take careful notes about ...
Pulleys are examples of what scientists callsimple machines. That doesn't mean they're packed withenginesandgears; it just means they help us multiply forces. If you want to lift a really heavy weight, there's only so much force your muscles can supply, even if you are the world's stro...
Levers and pulleys are uncomplicated machines that make work easier by improving mechanical advantage, meaning that they reduce the effort needed to do a task. They provide "leverage," changing the direction of our effort. If you go down to your basement or out to the garage, you'll find d...
As it turns out, the automated stitching mechanism at the heart of a sewing machine is incredibly simple, though the machinery that drives it is fairly elaborate, relying on an assembly of gears, pulleys and motors to function properly. When you get down to it, the sewing machine is among...
The projects include: incline planes, levers, wheels and axles, gears (spur, compound, rack and pinion, and planetary), cams, cranks, pulleys, ratchets, and springs. Hands-on, interactive, and engaging, this kit will bring out the DIY and inventor spirit in every child.Nick ...
Cranes are useful because their lever-beams, pulley-hoists, gears, and hydraulics give us what's called a mechanical advantage (they work together to multiply lifting and moving force), but even the biggest, boldest cranes run up hard against two important limits. First, there's a maximum ...
The transformer gears this high speed (high speed, low torque=high voltage, low current) down for much less speed (less voltage swing) but much more torque (current).The alternating current audio signal flows through the speaker's voice coil which generates a magnetic field. The voice coil ...
CVTs also have various microprocessors and sensors, but the three components described above are the key elements that enable the technology to work. HowStuffWorks The variable-diameter pulleys are the heart of a CVT. Each pulley is made of two 20-degree cones facing each other. A belt rides...
As it turns out, the automated stitching mechanism at the heart of a sewing machine is incredibly simple, though the machinery that drives it is fairly elaborate, relying on an assembly of gears, pulleys and motors to function properly. When you get down to it, the sewing machine is among...
Because of the ratio between the huge tumbler diameter and the tiny motor pulley diameter, no other gears are needed! You can see the thin belt wrapped around the tumbler in the picture above. Motor and pulleys A motor drives the small silver pulley that is visible beneath the black ...