. Locomotive engineering : a practical journal of railway motive power and rolling stock . • •- -• • -• • e- -• • 502 LOCOMOTIVE ENGINEERING. frnQkv Steam Ga§e and ^rosuy Valve Co< Makers of High Grade Steam The Crosby Patent Thermostatic Water-Back Pressure Gage. Under the extremely high pressures at which steam isnow carried, ga>*es often become heated to a high degree,and the tube springs become expanded and consequentlyweakened, so that they offer less resistance, whereby thepointer shows more pressure than actually exists. Thishas been the cause for much complaint where
. Locomotive engineering : a practical journal of railway motive power and rolling stock . • •- -• • -• • e- -• • 502 LOCOMOTIVE ENGINEERING. frnQkv Steam Ga§e and ^rosuy Valve Co< Makers of High Grade Steam The Crosby Patent Thermostatic Water-Back Pressure Gage. Under the extremely high pressures at which steam isnow carried, ga>*es often become heated to a high degree,and the tube springs become expanded and consequentlyweakened, so that they offer less resistance, whereby thepointer shows more pressure than actually exists. Thishas been the cause for much complaint wherever, fromthe necessary conditions, the ORDINARY steam gage issubjected to extreme heat, as is the case on the boilers ofsteamships, cruisers, locrmotives. and in many other situ-ations. To meet suco cases the Crosby Patent Tiier-MOSTATIC Water-Back Gage was invented and is nowoffered to the public. It is fully guaranteed to registerthe pressure of steam correctly throughout its workingrange, a any temperature from 150 to 200 degrees F. The upper illustration shows this device. W hen thegage is subjected to a high temperature, the movement ofthe thermal bar C. D. exactly counteracts the excessivemovement of the tube
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Keywords: ., bookcentury1800, bookdecade1890, bookidlocomotiveen, bookyear1892
