Cyclopedia of locomotive engineering, with examination questions and answers; a practical manual on the construction care and management of modern locomotives (1916)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & co., pub. for Sears, Roebuck & co. · leaf 136
: points of both release and compression. If the valve I has inside lap or inside clearance it will be necessary 1 to locate two additional points on the valve rod. These points may be found in the following manner: Set a small pair of dividers to a distance equal to the J inside lap or inside… … Figure 63 it is inside clearance or of compression if it is insidelap. These two points are very seldom used inpractice, but if, owing to the construction of the valve,it should become necessary to use them it shouldalways be remembered what they represent, whetherinside lap or inside clearance.…
Locomotives
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