Locomotive appliances . Fig. 11. Fig. 12. Single Bourdon Tube Spring. Double Bourdon Tube Springs. Crosby Thermostatic Water-Back Gauges. made of a homogeneous metal, and when the tubesprings are affected under heat as above stated, ittransmits the increased movement just in the sameway that it would transmit the intended or designedmovement when the tube springs are cold. Thus theerror arises. In the improved gauge4 above shown, thisbar is made of brass and steel brazed together, forminga thermal bar, so that, under the influence of hightemperatures, it will compensate for the expansion orlen
Locomotive appliances . Fig. 11. Fig. 12. Single Bourdon Tube Spring. Double Bourdon Tube Springs. Crosby Thermostatic Water-Back Gauges. made of a homogeneous metal, and when the tubesprings are affected under heat as above stated, ittransmits the increased movement just in the sameway that it would transmit the intended or designedmovement when the tube springs are cold. Thus theerror arises. In the improved gauge4 above shown, thisbar is made of brass and steel brazed together, forminga thermal bar, so that, under the influence of hightemperatures, it will compensate for the expansion orlengthening of the tube springs and their greatermovement thereby under pressure, by retarding 7 98 LOCOMOTIVE APPLIANCES. simultaneously the motion of the index which recordssuch movement on the dial. The action of this ther-mal bar is, that its end remote from that where it isattached to the tube springs will droop, or deflect, ormove oppositely to the tube springs on account of theaction of the temperature upon the two
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectlocomot, bookyear1901
