. Railway and Locomotive Engineering. the manufacture of the jacks, andwhere, in connection with other of hisclever mechanical inventions, the workis still carried on with constantly in-creasing success. Like James Watt,the inventor of the steam engine. Dud-geon was rcluctaijtiy compelled to bringsuits against several imitators, who in-fringed on his patents, and it is gratify-ing to know that the courts decided inhis favor in every instance. The introduction of the hydraulicjack into England was also made byMr. Dudgeon, and a new host of imita-tors arose. Doubtless they also couldhave been fo
. Railway and Locomotive Engineering. the manufacture of the jacks, andwhere, in connection with other of hisclever mechanical inventions, the workis still carried on with constantly in-creasing success. Like James Watt,the inventor of the steam engine. Dud-geon was rcluctaijtiy compelled to bringsuits against several imitators, who in-fringed on his patents, and it is gratify-ing to know that the courts decided inhis favor in every instance. The introduction of the hydraulicjack into England was also made byMr. Dudgeon, and a new host of imita-tors arose. Doubtless they also couldhave been fought to a standstill, butthe inventor had not time to waste his energies in tedious lawsuits. Other in-ventions were coming from his cleverhands, among which was the flue ex-pander, which also met and still meetswith great popular favor. It is inter-esting to learn that in the launchingof the Great Eastern steamship it wasfound that the enormous weight of thevessel had caused a sinking of the un-der supports, and the launching of the. JACK. great ship seemed for some time aphysical impossibility. An English en-gineer, Richard Tangye, who had madea trifling change on some little detailin Dudgeons jack constructed a set ofjacks that succeeded in successfullylaunching the ship, and Brunei, the con-structor of the ship, publicly ascribedthe success of the launching toDudgeons masterly invention. Coming to the construction of thehydraulic jack as generally used in lo-comotive work, the complete details are almost all sliown in the accom-panying illustration. It will be ob-served that the head and interior tubeform separate reservoirs. In the middlereservoir a force pump of simple con-struction is located with two automaticvalves so arranged that on the down-ward stroke of the plunger the pres-sure of the liquid beneath closes theupper valve and opens the lower the upward stroke of the plungerthe upper valve opens, while the pres-sure of the liquid in the lower rese
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyork, bookyear19
