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Individual
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Individual
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Priority to ES14721ApriorityCriticalpatent/ES14721A1/en
Publication of ES14721A1publicationCriticalpatent/ES14721A1/en
ES14721A1893-06-221893-06-22
Improvements in the devices designed to regulate the escape of the hot gases that come out of the tube boilers.
ExpiredES14721A1
(en)
An arrangement to produce the simultaneous heating of the combustion air and the feed water, by means of the gases emerging from the tubes or ducts of the steam boilers.