Machine definition
A machine is a tool containing one or more parts that uses energy to perform an intended action. Machines are usually powered by chemical, thermal, or electrical means, and are often motorized. Historically, a power tool also required moving parts to classify as a machine. However, the advent of electronics has led to the development of power tools without moving parts that are considered machines.
A simple machine is a device that simply transforms the direction or magnitude of a force, but a large number of more complex machines exist. Examples include vehicles, electronic systems, molecular machines, computers, television, and radio.
| Classification | Machine(s) | |
|---|---|---|
| Simple machines | Inclined plane, Wheel and axle, Lever, Pulley, Wedge, Screw | |
| Mechanical components | Axle, Bearings, Belts, Bucket, Fastener, Gear, Key, Link chains, Rack and pinion, Roller chains, Rope, Seals, Spring, Wheel | |
| Clock | Atomic clock, Watch, Pendulum clock, Quartz clock | |
| Compressors and Pumps | Archimedes' screw, Eductor-jet pump, Hydraulic ram, Pump, Trompe, Vacuum pump | |
| Heat engines | External combustion engines | Steam engine, Stirling engine |
| Internal combustion engines | Reciprocating engine, Gas turbine | |
| Heat pumps | Absorption refrigerator, Thermoelectric refrigerator, Regenerative cooling | |
| Linkages | Pantograph, Cam, Peaucellier-Lipkin | |
| Turbine | Gas turbine, Jet engine, Steam turbine, Water turbine, Wind generator, Windmill | |
| Aerofoil | Sail, Wing, Rudder, Flap, Propeller | |
| Information technology | Computer, Calculator, Telecommunications networks | |
| Electricity | Vacuum tube, Transistor, Diode, Resistor, Capacitor, Inductor, Memristor, Semiconductor | |
| Robots | Actuator, Servo, Servomechanism, Stepper motor | |
| Miscellaneous | Vending machine, Wind tunnel, Check weighing machines, Riveting machines | |
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