The engineer's sketch-book of mechanical movements, devices, appliances, contrivances and details employed in the design and construction of machinery for every purpose

by Thomas Walter Barber

[336]. Swing bracket crane and traveller, usually formed of flat bars on edge; used only for light loads, for smiths’ shops, &c.

[337]. Wharf derrick, to turn an entire circle, similar to [No. 329], but employed for heavy loads.

[338]. Floating derrick.

[339]. Light balance crane.

[340]. Trussed jib crane, with centre tension bolt.

[341]. Simple derrick and winch, with two guy ropes; for temporary purposes only, and may be easily shifted about.

[342]. Sheers and winch.

[343]. Tripod and winch.

[344]. Sheers with screw adjustment to back leg. This design is adopted for very heavy lifts, such as loading heavy machinery, shipping masts, boilers, &c.