. The railroad and engineering journal . t C, inwhich the pin B can slide : consequently, when an ordinarydraw-bar comes in contact with the hook it is simply pushedback until it bears against the draw-head, thus relieving the pin£ of all strain on it. C is a latch connected to the draw-head and steadiness of action are secured, and the arrangements bywhich the air cylinders are kept cool. These compressors are not only used for tunnel and miningwork, bridge foundations and similar woik, but also in wreck-ing and other submarine operations, to furnish air to this class of work their
. The railroad and engineering journal . t C, inwhich the pin B can slide : consequently, when an ordinarydraw-bar comes in contact with the hook it is simply pushedback until it bears against the draw-head, thus relieving the pin£ of all strain on it. C is a latch connected to the draw-head and steadiness of action are secured, and the arrangements bywhich the air cylinders are kept cool. These compressors are not only used for tunnel and miningwork, bridge foundations and similar woik, but also in wreck-ing and other submarine operations, to furnish air to this class of work their steadiness and uniform action areespecially valuable. Electric Street Cars. The Sprague motor is now on trial on the street railroad linein Davenport, la. The cars of that line are already lighted onthe Sprague system. A street car operated by storage batteries on the Julien sys-tem is now on trial on the North Baltimore Passenger are many heavy grades on this line which it is stated thecar works over without THE HIX CAR-COUPLER. by a pin £ and slot F, fig. 2. When the hook is pushed backin buffing it moves the latch G upward on the bolt £, so thatwhen the pressure on the latch is relieved its weight causes it tofall downward, and thus pushes out the hook into the positionshown in the engraving. Ordinary draw-bars are coupled by alink to a pin /;, which is in the head instead of being attachedto the hook, as in the Janney and some other forms of knuckle-joint of the hook is thus relieved of all strain ofpulling and buffing when coupled to ordinary draw-bars. This coupler is the invention of O. P. Hi.\, of Rockland, Me. Air Compressors. The use of compressed air in operating rock drills and othermachinery in tunneling and other underground work has be-come so general that the air compressor is recognized as an es-sential part of the contractors plant. It is equally so in puttingin the substructure of bridges, the employment of the pneu
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Keywords: ., bookcentury1800, bookdecade1880, bookidrailroadengi, bookyear1887
