engineering, electromechanics combines the sciences of electromagnetismof electrical engineeringand mechanics. " Mechatronics" is the discipline of engineering that combines mechanics, electronicsand information technology( software engineering).
"Electromechanical devices" are those that combine electrical and mechanical parts. These include
electric motors, loudspeakers, some fire alarms and mechanical devices powered by them, such as calculators and adding machines; switches, solenoids, relays, crossbar switches and stepping switches.
Relays originated with telegraphyas electromechanical devices used to regenerate telegraph signals.
Strowger switch, Panel switchand similar ones were widely used in early automated telephone exchanges. Crossbar switches were first widely installed in the middle 20th century in both the United Statesand Britain, and quickly spread to the rest of the world.
Paul Nipkow proposed and patented the first electromechanical television system in
1885. Electrical typewriters developed, up to the 1980s, as "power-assisted typewriters." They contained a single electrical component in them, the motor. Where the keystroke had previously moved a typebar directly, now it engaged mechanical linkages that directed mechanical power from the motor into the typebar. This was also true of the forthcoming IBM Selectric. At Bell Labs, in the 1940s, the Bell Model V computer was developed. It was an electromechanical relay-based monster with cycle times in seconds. In 1968 Garrett Systemswere invited to produce a digital computer to compete with electromechanical systems then under development for the main flight control computer in the US Navy's new F-14 Tomcatfighter.
Today, though, common items which would have used electromechanical devices for control, today use, less expensive and more effectively, a standard integrated circuit (containing a few million transistors) and write a computer program to carry out the same task through logic. Transistors have replaced almost all electromechanical devices, are used in most simple feedback control systems, and appear in huge numbers in everything from traffic lights to
Linear feedback shift register
Automatic transmission system
Electric power conversion
Torpedo Data Computer
Unit record equipment
* [http://www.electromechanicalparts.com/ Electromechanical Parts]
* [http://www.amsemi.com/ ElectroMechanical Database]
1. Paul C. Krause and Oleg Wasynczuk, "Electromechanical Motion Devices", McGraw-Hill Series in Electrical and Computer Engineering (1989). ISBN-10: 0070354944.
2. Edward P. Furlani, "Permanent Magnet and Electromechanical Devices: Materials, Analysis and Applications", Academic Press Series in Electromagnetism (2001). ISBN 0-12-269951-3.
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