And now some words on the headphone jack

Also known as phone connector, phone jack, auto jack, and jack plug was invented as early as 1877 for use in telephone switch boards, installed by Charles Williams Jr in Boston.

Still used today the different sizes in diameter, one and two-pin versions are used for headphones, cordless phones, mobile phones, two-way radios, digital cameras, camcorders, portable DVD players, laptops, microphones, synthesizers, instrument amplifiers, musical instruments, speakers, just to name a few.

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An improved design in 1902 of the connector is still used by mainstream musical equipment.

In 1950 the connector for ear peices on transistor radios remains standard today. Several modern designs are used by the military and in aviation.

Then come along large phone companies like I-phone and Samsung in order to gain auto monopoly, removing the connector entirely from their products. I-phone creating a new version of the jacks. Samsung using a USB-C connector for use with the jacks. 

If it’s broke....don’t fix it. But I guess money can’t be made by an invention that has lasted and proved it’s resilence since 1877.

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