The origin of the invention: a tea making automatic with alarm clock 1902

a cup of tea

I've had tea making auto-sampler device invented by Frank Clarke was a serious organ depends on ignite methyl alcohol, which leads to the boiling water in a copper pot.
Then it was the pot tends and fill in  as tea and called the alarm clock will ring.

A tea making automatic with alarm clock 1902

When boiling

Swan was electric jug which appeared in 1921,the first device includes a fully embedded heating element.
Previous models were include heating elements in a separate part in The bottom of the pot, which was conducive to have a large portion of the heat.

 Electric jug which appeared in 1921


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