Practical stationary engineering : in form of questions and answers (1909)
West, Andrew Cassius, 1855- · Boston, Mass. : A.C. West · leaf 210
der, provided with a shoulder against whichthe inner flange of the coupling proper rests, forming a per-fect swivel coupling, and is a decided improvement overthe form of coupling having the right and left hand thread. american thompson improved indicator 197 Springs. The springs are made of the… … Figure 56. Figure 57. spring, and a consequent less strain than if wound, as insprings of other indicators, on mandrels two to three threadsto the inch. 198 PRACTICAL STATIONARY ENGINEERING All springs used in other instruments, whether double;single, or having a steel bead for bottom end when…
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