simple machine


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simple machine

[′sim·pəl mə′shēn]
(mechanical engineering)
Any of several elementary machines, one or more being incorporated in every mechanical machine; usually, only the lever, wheel and axle, pulley (or block and tackle), inclined plane, and screw are included, although the gear drive and hydraulic press may also be considered simple machines.

Simple machine

Any of several elementary machines, one or more of which is found in practically every machine. The group of simple machines usually includes only the lever, wheel and axle, pulley (or block and tackle), inclined plane, wedge, and screw. However, the gear drive and hydraulic press may also be considered as simple machines. The principles of operation and typical applications of simple machines depend on several closely related concepts. See Efficiency, Friction, Mechanical advantage

Two conditions for static equilibrium are used in analyzing the action of a simple machine. The first condition is that the sum of forces in any direction through their common point of action is zero. The second condition is that the summation of torques about a common axis of rotation is zero. Corresponding to these two conditions are two ways of measuring work. In machines with translation, work is the product of force and distance. In machines with rotation, work is the product of torque and angle of rotation. See Hydraulic press, Wedge

References in periodicals archive ?
Simple machines use physical laws to make work easier--for instance, allowing you to move a much heavier weight than you could alone.
A compound machine is made up of 2 or more simple machines working together.
But how can we use the lever, and other simple machines, on the homestead?
The simple machine cell is not to be confused with automated cells such as punching cells or FMC (flexible manufacturing cellular) lines.
By utilizing one simple machine, everyone from beginners to professional cake decorators will save significant time, money and space in their pursuit of creating the perfect cake.
eGard is a fully modular system that can control access to hazardous machinery via gate switch and trapped key technology and can also include simple machine of access controls such as push buttons, e-stops and lamps, eGard can connect to PLCs and mimic panels, or can be used on an AS-interface network.
People swiping your cards in restaurants can copy the card with a simple machine.
Metallic contamination can occur at any point in the production process from a broken screen, a damaged mixing blade, simple machine abrasion or operator error.
The simple machine requires no glue, no warm up times and changeover can be completed in just a few minutes.
Typically these projects require higher engineering focus than simple machine shop items.
eGard is a modular system that can control access to hazardous machinery, via gate switch and trapped key technology, and include simple machine or access controls such as push buttons, e-stops and lamps.
1 widens the scope of the initial standard from simple machine state and inventory, and extends it to allow for more complex features," said Winston Bumpus, DMTF president.