Kirkman, Marshall M. (Marshall Monroe), 1842-1921 · New York and Chicago, The World railway publishing company · leaf 111
ent co-operating spiral spring(A) applied to the free end of thesingle Bourdon tube, which dis-penses with the necessity of asecond tube, and reduces thenumber of joints subjected towear and friction between thetube and the segment of the recording movement to two. The Bourdon tube, it should be… … Pig. 18.Ashcroft Auxiliary SpringLocomotive Steam Gauge.
Locomotives
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