31.007 UNIFORMITY IS ESSENTIAL, Science Service Historical Image Collection

1932 - every motor shall be interchangeable with every other motor of the same size and type

UNIFORMITY IS ESSENTIAL

CD 1966053 E&MP31.007

Electric Motors

APR 20 1932

When every electric motor conforms to the specifications, they are all exactly alike.

This necessity is further emphasized in big railway electrification projects by the requirement that every motor shall be interchangeable with every other motor of the same size and type. By mounting four large twin-motor frames on a planer, Westinghouse Electric and Manufacturing Company gets this degree of uniformity.

Slowly, powerfully the platform carrying the frames moves back and forth beneath cutting tools fastened to the cross beam. Absolute uniformity is the result.