Transactions of the Society of Motion Picture Engineers (1916)

Record Details:

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Mr. De Vry objected that the cutter would soon deform. Mr. Victor took care of his objection. Mr. Roebuck concluded the discussion by emphasizing the practicability of accuracy with low cost. He told of an automatic machine which he saw at the Chicago World's Fair, which made the barrel arbor in a watch movement. He illustrated by a sketch on the blackboard what the arbor is, and the fact that it must be accurate enough to be interchangeable within all watch movements of that make. This machine was doing the several operations necessary automatically and yet with sufficient accuracy, that the finished pieces cost the trade only about 30 cents apiece. 73