It hoists, slews, and lowers, controlled by single lever on side of lorry. Power transferred by take-off from lorry engine. Hydraulically operated support leg relieves lorry chassis and springs from strain. When not in use, vane jib stowed behind cab. No side overhang and main pillar of crane is only 9 to 12 in.
Safety device prevents overloading or over- hoisting.
Plant House, Ealing, London W. 5. With this new hook design, lifting load automatically locks gate. To open, hook must be unloaded and manually pressed against a compression spring. Gate made of manganese bronze alloy of 110,000 lb. Jumbo Sawmill equipped with A 20 ft.