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Figure 1. Burton-process barrel rolls, from Ordnance Memorandum No. 22, The Fabrication of Small Arms for the United States Service, Plate III. A partly finished barrel is passing through the rolls, and the disc-shaped collar on its mandrel (here indicated as F, Barrel Rod) has struck the frame in front of the rolls, so that the barrel, moving away from the viewer, is being peeled off the mandrel. A driving belt runs over a big pulley in a protective wooden guard at left and drives the lower roll through a clutch. The lower roll is geared to the upper one at the right. |
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