December, 1955, when this photo was made, was about twenty years before the smoke detector with a battery was available, and it very quickly got wide spread use. Today, for just $4.25, you can get an excellent smoke detector that is about 5"-diameter w/ a 9-v battery, down at Walmart.
Fires can get going really fast, and smoke detectors work good.
When these 1955 photos were made, there were no smoke detectors, by about twenty years.
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