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John Henry Holmes invented the first push-button phone on November 18 1963
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the push button was invented by an unknown inventor on an unknown date
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At the same time,engineers were building complex machines controlled by rows and rows of switches and buttons.
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A push button switch is a small, sealed mechanism that completes an electric circuit when you press on it. When it's on, a small metal spring inside makes contact with two wires, allowing electricity to flow.
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A push-button is a simple switch mechanism for controlling some aspect of a machine or a process.