Spon, Ernest, Haldane, Robert, Lock, Charles G. Warnford (Charles George Warnford), 1853-1909 · London ; New York : E. & F.N. Spon · leaf 90
72 " switched " into the signalling appa- ively to / and e. At low-water level ratus i, which may be of any suitable the weight of 6 will bring e into con- construction, such as a trembling bell, tact with g ; at high level, its buoyancy or an electric lamp, or an electric motor will bring e into… … the action during the time when there lever; d, brass contact-screw; e, countei'- is little or no circulation in the boiler. weight and stop to prevent Aveight (6) Fig. 2 1 shows an arrangement for from passing through lever ; /, float ; signalling both high and low water g, stop for same ; /;,…
Workshop recipes · Technology · Industrial arts
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
