Treatise covering operation, defects and remedies of the locomotive, Westinghouse and New York air-brake, also questions and answers to first, second and third year's progressive examinations (1917)
MacDonald, J. R. [from old catalog] · [Chicago] The author · leaf 273
ow.When the pressure below the valve 4 decreases the com-pression of the spring forces the valve downward. Thevalve restricts the lower ports to the atmosphere and opensthe vertical ports leading from the valve below to thespring chamber above. The spring chamber above is at alltimes connected with… … Fig. 41. Emergency Position of No. 6 Distributing Valve withQuick-Action Cap WESTINGHOUSE AIR BRAKE 271 escape to the atmosphere through the small ports in thebody, thus causing a pressure to build up above the valvewhich assists the spring in closing it, giving it the actionof a pop. Defects of…
Locomotives · Westinghouse air-brake · New York air-brake
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