Two machines, or parts of machines. These are a “Four-Plunger Valve” and “A starter valve” from The engineer’s sketch-book of mechanical movements, devices, appliances, contrivances and details : employed in the design and construction of machinery for every purpose : classified and arranged for reference for the use of engineers, mechanical draughtsmen, managers, mechanics, inventors, patent agents, and all engaged in the mechanical arts, with nearly two thousand illustrations, descriptive notes and memoranda, a charming collection of industrial illustrations which I found on archive.org
The descriptions of what these things do are as follows:
1508. Four plunger valve, used for double power hydraulic lift
cylinders employing a trunk piston. For the low power the pressure water acts on both sides of the piston ; for the double power it acts only on the back of piston, the front side being then open to the exhaust.1509. A starting valve, having two ordinary wing or spindle valves,
either of which is lifted by a double cam or wiper on a spindle passing through a stuffing box on side of valve case. A supply, B cylinder port, C exhaust