Erection, different methods of, 49-51 Evolution of valve motion, II F FORMULAS for lay-out of the gear, 105-109 GEAR, reversing, 37-39 G General effects of lead, 143-148 General notes for adjusting Walschaert valve gear, III to 113 H HACKWORTH Valve gear, 198 to 204 inclusive Heating of driving-boxes prevented by adoption of Walschaert Heaviest engine, and fastest engine, have Walschaert gear, 67 Heaviest switching engine (decapod) with Walschaert gear, 75 Broken combination lever, how to provide for getting along Chart showing valve events, 215 Compression-valve rod, breakage of, 217 Cylinders and valves, 204 to 212 Eccentric rod or eccentric crank failure, how to overcome trouble, 219 If radius bar fails, what to do, 222 Main valve-rod, breakage of, 217 Questions and answers on break-downs, 217 to 222 Reach rod, reach-rod arm, or reverse shaft, if broken what Reverse link or reverse arm, what to do if broken, 218 Hobbart-Allfree, Transmission bar failure, what to do, 219 "Hooking-up," meaning of, 160 How to get along with broken valve stem, 179, 180 How to proceed with Walschaert eccentric rod broken, 179 How Walschaert eccentric rod can be changed in length, 167, 168 I IF lead is not desired could the combination lever be dispensed Indirect valve motion, 26 Inside vs. outside admission valve, 16 Inspection of the erected gear, 101 Instructions for using cardboard valve models on the folder diagrams, 119 to 121 inclusive Introducing cut-off, 33 Invention of Walschaert valve gear, 12 Is increase of lead desired? Does the established amount of lead Advance of the valve for other vary in the Walschaert gear? purposes besides securing lead. Is lead necessary? 156 K KIND of eccentric used with Walschaert and Stephenson valve L LAP and lead, changing the, 194 Lap and lead; cut-off, 17, 18 Lap and lead with Walschaert gear, 30 to 32 inclusive Location of suspension of the Walschaert link, and carriage of the Location of suspension of Walschaert link, 76 to 80 inclusive Long's diagram of valve events, 109 to 111 inclusive L. S. & M. S. Ry. engine with Walschaert gear-heaviest pas- M MALLET articulated compound engine, 62 to 64 inclusive Meaning of the term, "valve motion." From where the valve Meaning of "working quarter" of the crank-pin, 165, 166 Method of disconnection, etc., with a broken main rod, 181, 182 Motor car with Walschaert valve gear, 67 OPPORTUNITY for rigid frame bracing in the use of Walschaert Outside vs. inside admission valves in connection with Walschaert P PERMANENCE of adjustment of the Walschaert gear, 139, 140 necessary to correct its length, 168 Permanency of the Walschaert gear, 52 Piston and D-slide valves, 17 Piston, broken, or detached, 182 Position of valve in relation to piston. What is meant by "lead," Preliminary suggestions, 95 to 98 inclusive RADIAL valve gears other than the Walschaert, 198 to 236 in- clusive Radius rod, 35, 36 Radius rod suspension, 65 Radius rod, testing for length of, 191 Reauleaux and Zeuner diagrams, 114-119 Reasons for Walschaert link curving in opposite direction to the Reversing gear, 37-39 SECURING lead, 27 S Securing lead with Stephenson eccentrics. Securing lead with Setting valves with Walschaert gear, 189 to 197 inclusive Simple comparative test of Walschaert and Stephenson valve Squaring the valve: by shortening or lengthening the valve stem, Suggestions as to certain dimensions and proportions of the Wal- T TEST of Walschaert and Stephenson valve gears, 148 The Allan valve gear, and the Allen valve, 102 The built-up Walschaert gear complete, 42 The combination lever, 29 The dead center, to locate crankpin on, 192, 193 The general effects of lead, 143 to 148 inclusive The radius rod, 35, 36 The Reauleaux and Zeuner diagrams, 114 to 119 inclusive The several effects from lead. Use of a compression instead of lead, 154 The valve, 15 The Walschaert link, 34 Theory of the combination lever, 96, 97 U USE of Walschaert gear indicated on engines with crank-axles, 141, 142 V VALVE gears of De Glehn compound, 69 to 73 inclusive Valve gears, the three general types of, 198 Valve models, instruction for using, 119-121 Valve motion, indirect, 26 Valve, the, 15 Variations in the angle between eccentric and crank-pin, 121 W WALSCHAERT eccentric rod changed in length, 167, 168 Walschaert eccentric rod may be changed in length. Other parts of the gear. Does any particular part of the Walschaert gear have a tendency toward heating? 163 Walschaert gear adjustment, 102 Walschaert gear, Helmholtz modification of, 113, 114 Walschaert gear, Mason's early design, 53-57 Walschaert gear unaffected by side-rod breakage, 84 Walschaert gear with piston valves, 60 to 62 inclusive Walschaert link, 34 Walschaert link, details of, 44-49 Walschaert link, details of link, Frontispiece Walschaert locomotive valve gear, names of parts, Frontispiece |