SAG-RESISTING WIRE

CD 1964019 E&MP25.077

Electric Lamps

Nov. 1938

Enlargement of a double-coiled lamp filament for a 60-watt Westinghouse Mazda lamp.

Inspection shows the compound coil structure resulting in new high efficiency of light production, made possible by sag-resisting, wire and precision coiling.  

Original Caption by Science Service
^©Westinghouse