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Image from web page 665 of “Electric railway overview” (1906)
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Title: Electric railway review
Year: 1906 (1900s)
Authors: American Street and Interurban Railway Association
Subjects: Street-railroads Electric railroads
Publisher: Chicago : Wilson Co
Contributing Library: Carnegie Library of Pittsburgh
Digitizing Sponsor: Lyrasis Members and Sloan Foundation
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Is considerably lighter than the regulartype-C brake of the identical gear ratio of which it is a modifica-tion. The brake has been on the industry less than a month. TITAN GEARS. The material composing the Titan gears manufactured bythe Atha Steel Casting Firm, of Newark, N. J., is so tough that it cannot be reduce by anytool steel however-known. Allfinished surfaces, such asteeth and hub-fit, are ac-curately ground to tem-plates. Despite the fact that the ma-terial is hard, it is notbrittle on the contrary itis so difficult that test pieceshave been bent coldthrough an angle of 180degrees with out showingfracture. The gear is madesolid with the teeth castin, then a special machinegrinds the periphery of theteeth to the correct di-ameter. An additional machinegrinds each and every tooth to themaster, whilst nevertheless one more machine grinds out the hub-match and faces both sides. A gray iron or soft steel hub is thenpressed in at a pressure of 35 to 4.five tons per square inch,and is bored out to the proper size for forcing on the axle.
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Titan Gear. When arrangements have been getting produced for the Louisianapurchase exposition, held in St. Louis, Mo., in 1904, a specialcommittee was appointed to contemplate the question of streetpaving. Soon after an exhaustive investigation Bitulithic wasselected for Lindell boulevard, the primary thoroughfare whichled to the principal entrance to the exposition. The wisdomof this specific committee later was indicated by the superiorjury of awards, which granted to Bitulithic the gold medalas the nearest method to the perfect pavement. The James-town boulevard commission also chosen Bitulithic above allothers for the boulevard to the Jamestown, (Va.), expositiongrounds. A rail bond with a conductivity of two-thirds that of therail is obtained only below exceptional circumstances, but arail bond of such conductivity that the drop of possible acrosstwo feet of bonded rail is significantly less than the drop of potentialacross two feet of strong rail would surely seem to be theideal bond. Harold P. Brown, 120 Libe
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Image from page 463 of “Farm machinery and farm motors” (1908)
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Title: Farm machinery and farm motors
Year: 1908 (1900s)
Authors: Davidson, Jay Brownlee Chase, Leon Wilson
Subjects: Agricultural machinery
Publisher: New York, O. Judd firm [and so forth., and so on.]
Contributing Library: The Library of Congress
Digitizing Sponsor: Sloan Foundation
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turn will propel the drivewheels. But if the drivewheel attached to pinion Ghappens to travel more rapidly thanthat attached to shaft F the^^^^. , pinion C will revolve and ^9^^EB^^^£.^^SJliL ^^^^^ ^^^ pinion A will propel^^^^S»^BSi^rtF«»c the gearing. Usually there are some quite serious jerks onthe transmission gearing ofan engine and some com-panies are now inserting intheir compensating gears aset of springs which take this jar off the gearing. 590. Traction.—Any traction engine has power enoughto propel itself over the road and by way of the fields pro-vided the drive wheels do not slip. Consequently thematter of the wheels adhering to the ground is an im-portant portion. Where the road surface is firm there is nodifficulty but in a soft field excellent problems is experienceddue to the reality that the lugs of the drive wheels tear upthe earth and let the drive wheels to move withoutmoving the engine. It is a widespread belief that the driv^ewheel which has the sharpest lug is the one particular which will
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FIG- 335—COMPENSATING GEARS 452 FARM MOTORS adhere to the ground the very best. In almost all instances thisis not accurate, given that the lug which is sharp is quite apt to cutthrough the earth, even though one particular which is dull or round anddoes not have such penetrating impact will pack the earthdown and therefore make a lot more resistance for itself whilepassing via the earth. Practically each engine builderhas a style of lug of his personal. Fig. 338 shows a newstyle of traction wheel which seems to be giving verygood results. The far more weight that can be place on tothe drive wheels of an engine the better it will adhereto the ground, offering the surface is firm enough tosupport the load. This makes the matter of location of the principal axles upon theboiler an critical issue.When the boiler is rear-mounted it is obvious thatmore of the weight isthrown upon the frontwheels, which act as aguide, than when thePjg ^,g boiler is side-mounted. Hence one particular would be led tobelieve that the side-mounted traction engine will havebetter
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Please note that these images are extracted from scanned web page images that could have been digitally enhanced for readability – coloration and appearance of these illustrations may possibly not completely resemble the original function.