An air-raid alarm for the private home, estimated price $15, was last
week demonstrated by R.C.A. President David Sarnoff to Civilian Defense
Director Fiorello LaGuardia. The gadget: a box the size of a portable
radio which rings a bell and flashes a light when a radio warning
signal is sent out.
To continue reading:
Want the full story?
Get TIME the way you want it
Week Digital Pass — $4.99
Pay-As-You-Go DIGITAL ACCESS — $2.99
Year ALL ACCESS — Just $30! Best Deal!
Print Magazine + Digital Edition +
Subscriber-only Content on TIME.com
Learn more about the benefits of being
a TIME subscriber
If you are already a subscriber sign up — registration is free!