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

[376]. Balanced riveting machine. See Tweddell’s patents.

[377]. Variable lever balance. For balanced cranes, see [Section 18].

[378]. In deep lifts, to balance the weight of chain or rope, it is made endless.

[379]. Another method. The loose chain hung from cage is of the same weight per foot as the lifting chain.

[380]. Balance weight on a screw arm for adjustment, employed on weighing machines.

[Larger plate.]

[381] & [382]. Worthington’s compensating air cylinders, employed on direct-acting horizontal pumps, working expansively, in lieu of fly-wheel. The oscillating or vertical cylinders are air or spring pistons, absorbing power the first part of stroke and giving it out during the latter part.

[383]. Variable balance weight by bent lever.

[384]. Variable balance weight by double links and sliding joints.