Modern locomotive engineering, with questions and answers .. (1913)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & co · leaf 724
afety valve whichis a necessary part of the distributing valve. It is of animproved type, which insures reliability of operation. Itis unlike the ordinary safety valve, as its construction issuch as to cause it to close quickly with a pop action, ET BRAKE EQUIPMENT 695 insuring its seating firmly.… … FIG. 309. SAFETY VALVE Valve 4 is held to its seat by the compression of thespring 6 between the stem and adjusting nut 7. Whenthe pressure below valve 4 is in excess of the force ex-erted by the spring, it raises, being guided in its move-ment by the brass bush in the body 2. Ports are drilledin…
Locomotives
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