A push-button (often simply "button" or "pushbutton") is a simple switch mechanism for controlling some aspect of a machine or a process. A switch is a mechanical device used to connect and disconnect an electric Circuit at will A machine is any device that uses Energy to perform some activity Buttons are typically made out of hard material, usually plastic or metal. Plastic is the general common term for a wide range of synthetic or semisynthetic organic solid materials suitable for the manufacture of industrial products The M acro E xpansion T emplate A ttribute L anguage complements TAL, providing macros which allow the reuse of code across The surface is usually flat or shaped to accommodate the human finger or hand, so as to be easily depressed or pushed. Buttons are most often biased switches, though even many un-biased buttons (due to their physical nature) require a spring to return to their un-pushed state. A switch is a mechanical device used to connect and disconnect an electric Circuit at will A spring is a flexible elastic object used to store mechanical Energy. A state is a political association with effective Sovereignty over a geographic Area and representing a Population.
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Uses
In industrial and commercial applications push buttons can be linked together by a mechanical linkage so that the act of pushing one button causes the other button to be released. In this way a stop button can "force" a start button to be released. This method of linkage is used in simple manual operations that have not got electrical circuits in the machine or process. An electrical network is an interconnection of Electrical elements such as Resistors Inductors Capacitors Transmission lines Voltage
Pushbuttons are often color-coded to associate them with their function so that the operator will not push the wrong button in error. A color code is a system for displaying information by using different Colors Reading a color code is often difficult or impossible for the color blind. In Mathematics, an operator is a function which operates on (or modifies another function The word error has different meanings and usages relative to how it is conceptually applied Commonly used colors are red for stopping the machine or process and green for starting the machine or process. Red is any of a number of similar Colors evoked by light consisting predominantly of the longest wavelengths of Light discernible by the human eye in the wavelength
Red pushbuttons can also have large heads (called mushroom heads) to for easy operation and to facilitate the stopping of a machine. The pileus is the technical name for what is commonly known as the cap of a Fungal Fruiting body. These pushbuttons are called emergency stop buttons and are mandated by the electrical code in many jurisdictions for increased safety. Emergency stop has several meanings United Kingdom driving test For the practical section of the driving test, an examiner will often request the candidate This large mushroom shape can also be found in buttons for use with operators who need to where gloves for their work and could not actuate a regular flush-mounted push button. A glove ( Middle English from Old English glof) is a type of Garment (and more specifically a Fashion
As an aid for operators and users in industrial or commercial applications, a pilot light is commonly added to draw the attention of the user and to provide feedback if the button is pushed. USER is an international Recording artist who earned his chops in the techno-industrial period of the 1990s playing guitar with such notable bands as Atlantic A pilot light is a small Gas Flame, usually Natural gas or Liquefied petroleum gas, which is kept alight in order to serve as an ignition source Feedback is a circular causal Process whereby some proportion of a system's output is returned (fed back to the Input. Typically this light is included into the center of the pushbutton and a lens replaces the pushbutton hard center disk. A lens is an optical device with perfect or approximate Axial symmetry which transmits and refracts Light, converging or diverging The source of the energy to illuminate the light is not directly tied to the contacts on the back of the pushbutton but to the action the pushbutton controls. In this way a start button when pushed will cause the process or machine operation to be started and a secondary contact designed into the operation or process will close to turn on the pilot light and signify the action of pushing the button caused the resultant process or action to start.
In popular culture, the phrase "the button" (sometimes capitalized) refers to a (usually fictional) button that a military or government leader could press to launch nuclear weapons. Popular culture (or pop culture) is the Culture — patterns of human activity and the symbolic structures that give such activities significance and importance — A nuclear weapon is an explosive device that derives its destructive force from Nuclear reactions either fission or a combination of fission and fusion.
History
Buttons as control devices were unknown until the early 20th Century, with the possible exception of valves on wind instruments. A wind instrument is a Musical instrument that contains some type of Resonator (usually a tube in which a column of air is set into vibration by the player blowing Where small controls were needed- for example on camera shutters- they were usually styled after latches or triggers, early teleprinters had keyboards similar to keyboard instruments with white and black keys. A teleprinter (
The earliest examples of buttons as currently understood were probably mechanical typewriter keys in the early 20th Century, followed by electromechanical devices such as teleprinters and teletypes. A typewriter is a mechanical or Electromechanical device with a set of "keys" that when pressed cause characters to be printed on a medium A teleprinter ( These became more closely associated with electrical switching when used as a component of devices such as the Enigma Machine, and became commonplace in around the 1960s. The Enigma machine is any one of a family of related electro-mechanical Rotor machines used to generate Ciphers for the Encryption and decryption of
See also
External links
- Spring Return Button by Sándor Kabai, The Wolfram Demonstrations Project. A Big red button also known as the Big red switch is an actual or fictional Button with various functions See also Accordion A button accordion is a type of Accordion on which the Melody -side keyboard consists of a series of Buttons A panic button can either be a button that triggers an alarm or a button that 'resets' a MIDI musical instrument In Electronics and Technology, a reset button is a Button that can Reset a device. The shutter button is a Button found on many Cameras. When pressed the shutter of the camera opens Turbo button refers to a button on a piece of electronic equipment which makes the equipment run faster (or slower in some way
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