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no date - Westinghouse lamps must serve as martyrs to science in this rotary drum test

THROWING LAMPS DOWNSTAIRS

CD 1964042 E&MP26.033

Electric Light

no date

After undergoing heavy vibration while burning for one-third of their rated life, Westinghouse lamps must serve as martyrs to science in this rotary drum test before others of their kind are pronounced fit for sale and actual service.

Severity of the punishment administered here varies, because, as the engineers put it  ...we donít need Christmas tree lamps that will stand severe jolts such as locomotive headlight lamps get, any more than we need tractor treads on tires for a pleasure car.

Lamps designed especially for rough service naturally get the roughest treatment in the four-compartment box-like drum pictured. Rough service lamps must stand at least the equivalent of a bouncing trip down 400 steps which vary in height from 6 to 15 inches each.

As the drum revolves, slats on the sides of each compartment carry the lamps nearly to the top of the box, then allow them to fall to the bottom. Such bumps yield data on the strength of the glass globes, brass bases; filament, lead and support wires, and all other parts of a lamp. 


Original Caption by Science Service
©Westinghouse



National Museum of American History

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