Clipart images of several types of communication devices, including telephones, telegraphs, and phonographs. Communication devices can be classified as any machine or tool to communicate from one person to another.
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Telephone, Electric
"When a person speaks into the transmitter, the pulsations of the air, produced by the voice, produce the slight vibrations of the diaphragm...and these vary the pressure of the platinum point on the... |
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Telephone, Tin Can
A tin can telephone is a type of voice-transmitting device made up of two tin cans, paper cups or similar articles attached to either end of a string.... |
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Transmitter, Wireless Telegraph
"Wireless Telegraphy is a system of transmitting messages between distant points without the use of wires."—(Charles Leonard-Stuart, 1911)... |
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Wireless
Boys playing with a wireless apparatus.... |
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Yeate's Telegraph
Yeate's dial telegraph from 1875.... |