Identifier: cassiersmagaz401911newy (find matches)
Title: Cassier's magazine
Year: 1891 (1890s)
Authors:
Subjects: Engineering
Publisher: New York Cassier Magazine Co.
Contributing Library: Smithsonian Libraries
Digitizing Sponsor: Smithsonian Libraries

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ree. It may be noticed that provi-sion is made to take all end thrustsby ball bearings. In some cases anarrangement of spur gearing, ar- INTERNAL-COMBUSTION ENGINES 73i tite^tt$^ EJKl^t-- 1 Bf tag — j i M. WAV)*p!£V£*tf! It kmTmw - ■ hi ^9^ (fern*! *?,4£j\ FN ^w^ . « M 1 —^: ? j! ikL 1 * w FIG. 29. OIL ENGINE BUILT BY MESSRS. WILLIAM BEARDMORE & CO., GLASGOW ranged on the sun-and-planet princi-ple, is employed as an alternative tobevel gears; but in either case theresults obtained are the same—namely, that the engine always goesin one direction, and may work thescrew direct or it may run in thesame direction and let the screwstand still, or it may run in the same direction and reverse the direc-tion of the screw propeller. In the third system, which is sim-ply used on large engines, the pro-reller shaft and the engine shaft arepermanently connected together, as inordinary marine steam practice; andwhen reversing, the direction of rota-tion of the engine is changed as a
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FIG. 30. BRONS ENGINE BUILT BY GASMOTOREN FABRIK, DEUTZ, GERMANY 732 CASSIERS MAGAZINE whole; and, as a matter of fact, theactual reversing of the engine isnearly always done by throwing thefuel and air valves out of gear andmanipulating the engine for the mo-ment by an independent supply ofcompressed air. However, in smallengines of the Bolinders type the mo-tion of the piston is reversed bycausing a premature explosion to takeplace intentionally. It would be impossible to referhere in any detail to the different ar-rangements of valve gear used by va- tained by regulating the supply offuel to the engine, and there are cer-tain inconveniences attendant on this;and at very low speeds, or where thepropeller is suddenly deeply im-mersed, the engine may fail to firethe charge automatically. This par-ticular difficulty may be got over byallowing the high-pressure air supplyto come automatically into operationfor the time being, but this does notsolve the problem from a generalpoint of vie

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