Kirkman, Marshall Monroe, 1842-1921 · New York, Chicago, The World Railway Publishing Company · leaf 100
gauge. The objection to this gauge, as originally designed, was in the use of the flat diaphragm fastened rigidly at the circum- ference. It was impossible to make allowance for the draw- ing in toward the center when pressure was applied. The diaphragm made of a corru- Fig. 4. gated plate has… … indispensable. . ^ , ^ FlG-5- . L _^ -1 ,, in Early Form of Diaphragm For very small gauges bulb Gauge. siphons or "traps," three styles of which are shown in
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