RADIO TUBE OF METAL CAN BE WALKED ON (Nov, 1933)
Finally, I can realize my dream of making a floor out of radio tubes!
RADIO TUBE OF METAL CAN BE WALKED ON
Proof against the roughest handling, an indestructible type of radio tube developed in England is so sturdy that it may even be stepped on without damage, as shown above. A metal bulb replaces the customary one of glass, maintaining the vacuum and also serving as the anode; glass is used in the tube only to insulate the bulb horn the metal base, The tube is encircled by a metal cylinder for electrical shielding. It is designed for use anywhere but should prove especially valuable in portable sets or others frequently moved.