Radio: Radio, Aug. 11, 1941

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.

...

Want the full story?

Subscribe Now

Subscribe
Subscribe

Get TIME the way you want it

  • One Week Digital Pass — $4.99
  • Monthly Pay-As-You-Go DIGITAL ACCESS$2.99
  • One Year ALL ACCESSJust $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!