Ludy, Llewellyn V., 1875- [from old catalog], American Technical Society · Chicago, American technical society · leaf 169
t objectionable feature of the Hack-worth gear is, perhaps, the slotted guide, for the sliding of the blockcauses considerable friction and wear. The Marshall gear, shownin outline in Fig. 61, is designed to eliminate this feature. The pointA moves in the desired path by swinging on the rod FA… … Fig. 61. Diagram of Marshall Radial Valve Gear in the Hackworth gear, and the lever F P can be turned from fullgear forward (as shown in the figure) to full gear back (as shownby the line BP), intermediate positions giving different cut-offs thesame as with the Hackworth gear. Since F A is made…
Indicators for steam-engines · Steam-engines
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