Twentieth century hand-book for steam engineers and electricians with questions and answers; a practical non-technical treatise .. (1913)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 147
Fig. 53 AUXILIARY SPRING PRESSURE GAUGE, SECTIONAL VIEW !the springs tending to straighten it. The end or ends ofIthe spring being free to move, and connected by suitablegeared rack and pinion with the pointer of the irauL^e. tliis 134 Steam Engineering hand or pointer is cansed to move across the… … Fig. 54 AUXILIARY SPRING PRESSURE GAUGE Steam gauges should be tested frequently by comparingthem with a test gauge that has been tested against a col-umn of mercury. The steam gauge and the safety valve should be com-pared frequently by raising the steam pressure high enoughto cause the valve to…
