Modern locomotive engineering, with questions and answers .. (1913)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & co · leaf 142
M will represent thepoints of both release and compression. If the valvehas inside lap or inside clearance it will be necessaryto 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 theinside lap or… … 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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