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feb 5, 1969 - Battery smoke detector

Description:

In 1969 the first battery operated smoke detector was invented by Duane D. Pearsall. Battery operated smoke detectors let people put them in their houses without being wired in. Now people can put them in every room of their house. They also made it safer because if the power went out the detector still worked with the battery.

https://gvp5029.weebly.com/cultural-artifact--the-smoke-detector.html

Added to timeline:

3 months ago
1
0
104
Technology Timeline
Inventions 1900-1990

Date:

feb 5, 1969
Now
~ 49 years ago

Images:

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