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Steam engines, prepared in the Extension division of the University of Wisconsin (1919)

Shealy, Edward Marvin · New York, McGraw-Hill · leaf 101

An illustration from Steam engines, prepared in the Extension division of the University of Wisconsin, 1919, leaf 101 — ercome this disadvantage as well asto simplify the operation of changing springs for different pres- 86 STEAM ENGINES sures. The outside spring is especially adapted to superheated steam. The indicator shown in Fig. 55 also illustrates another recentimprovement in indicators, that is, a drum with… … Fig. 55. interrupted by the operator. The roll of paper is located withinan opening in the shell of the drum, thence the paper passesaround the outside of the drum and inward to a central cyUnder,to which it is attached. Upon the top of the drum is a ratchetwheel which automatically unwinds a small…

Steam-engines

Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.

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