SELF-CLEANING LAMP

CD 1963107 E&MP 25.047

Electric Lamps

March 13, 1929

To illustrate the description of the new type of high-powered incandescent lamp that itself cleans the blackening from the inside of the bulb...

- Left - High-powered incandescent lamp blackened after hours of service.

- Right - The black deposit removed by "sweeping" the coarse tungsten powder within the bulb.

Original Caption by Science Service
^©General Electric