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1937 - tweezers in a girl's hand point to a new high-efficiency tungsten filament atop a new type of mount construction for 60-watt Mazda lamps

HIGH EFFICIENCY FILAMENT

CD 1964018 E&MP25.076

Electric Lamps

May 10, 1937

The tweezers in a girl's hand point to a new high-efficiency tungsten filament atop a new type of mount construction for 60-watt Mazda lamps.

The effective length of the improved filament, developed in the Mazda lamp research laboratories, is only half that of the older type filament held horse-shoe fashion by the three supports of the other "mount" shown.  


Original Caption by Science Service
General Electric



National Museum of American History

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