Lumber, its manufacture and distribution . By permission Hill-Curtis Co. Fig. 18.—A Marine Drag Saw. A. Cylinder driving the Drag Saw. B. Trunnion.C. Dogging Arm. D. Cylinder for moving the Dogging Arm.. By Permission Hill-Curtis Co. Fig. 19.—Steam-driven Drag Saw for Deck Use. DEVICES FOR CROSS-CUTTING LOGS 39 Deck Drag-saw. This type of saw has steam, compressed-air, belt or walking-beamdrive. The equipment is placed on the deck near the point wherethe logs enter the mill, and the saw extends across the log trough. Atype of steam drive for deck use is shown in Fig. 19. This doesnot differ in
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Lumber, its manufacture and distribution . By permission Hill-Curtis Co. Fig. 18.—A Marine Drag Saw. A. Cylinder driving the Drag Saw. B. Trunnion.C. Dogging Arm. D. Cylinder for moving the Dogging Arm.. By Permission Hill-Curtis Co. Fig. 19.—Steam-driven Drag Saw for Deck Use. DEVICES FOR CROSS-CUTTING LOGS 39 Deck Drag-saw. This type of saw has steam, compressed-air, belt or walking-beamdrive. The equipment is placed on the deck near the point wherethe logs enter the mill, and the saw extends across the log trough. Atype of steam drive for deck use is shown in Fig. 19. This doesnot differ in the essential features of construction or operation fromthe marine steam drag-saw shown in Fig. 18. A steam or a compressed-air drive usually gives a more even stroke than the other typesmentioned. The walking-beam drive for a drag-saw with double cranks, driveneither by spur or bevel frictions, is shown in Fig. 20. The beam A,