File:Transactions (1871) (14768021275).jpg

Identifier: transactionsmining35amer (find matches)
Title: Transactions
Year: 1871 (1870s)
Authors: American Institute of Mining, Metallurgical, and Petroleum Engineers
Subjects: Mineral industries
Publisher: New York (etc.)
Contributing Library: Gerstein - University of Toronto
Digitizing Sponsor: University of Toronto

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t,1 I summarized Murguestheory and experiments, and presented a large number of testsof mine-fans, stating some conclusions, more or less war-ranted by the evidence, as to design, capacity and efficiency.Since that time the very valuable report of Mr. M. WaltonBrown,2 Committee on Mechanical Ventilators, Institution ofMining Engineers, has appeared, and I have made additionalexperiments which tend to clear up some points in connectionwith this subject. Design and Tests of the Luke-Fidler Colliery Fan. The Luke-Fidler fan (see Figs. 1, 2 and 3), built to replacean old wooden fan at a very fiery colliery, presents some pecu- 1 Tran.*., 5s, 637. 1 Trcmsactions of the Institution of Mining Engineers (London \ vol. xvii., p. 482,and vol. xviii., p. 488. 456 CENTRIFUGAL VENTILATORS. z rr < -I hi a. Ll J - m Q z _J Ll * (I) <x h C 1 z< LLl -1- 1o u.O it oo O 7< o :: O u <3 0- UJ s DC DC <x 2 O £ -a
Text Appearing After Image:
c;-\ i i:ni GAL \ i:n in, vmus. 1>7 Liaritiea in design. Being constructed f concrete and iron,it is absolutely fire-proof; and, with tin- addition of the largeexplosion-doors over the air-shaft, it is hoped also explosion-proof. The construction of the fan permits the changing ofthe action in a few moments, from exhausting to blowing, bjmerely opening the double-reversing doors in the air-way andraising the movable Bheel in the chimney (shown by thedotted lines in Figs. 1 and 2), both being done from the out-side without necessarily stopping the fan or even altering itsBpeed. In order to facilitate the reversing and to improve the blow-ing-passages, the fan, originally designed as shown in Figs. 4and 5, was turned 30° from the vertical, thus giving an inclinedchimney-flue, shown in Fig. 1. In all other respects it wasdesigned for an exhaust-fan which is its main work, the blow-ing feature being intended for use only in such emergen-cies, as mine-fires or explosions. There

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