Machinery

Some cool gear grinding photos:

Image from web page 463 of “Farm machinery and farm motors” (1908)

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Identifier: farmmachineryfar00davi
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 [etc., etc.]
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 faster thanthat attached to shaft F the^^^^. , pinion C will revolve and ^9^^EB^^^£.^^SJliL ^^^^^ ^^^ pinion A will propel^^^^S»^BSi^rtF«»c the gearing. Typically 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 more than the road and through the fields pro-vided the drive wheels do not slip. Consequently thematter of the wheels adhering to the ground is an im-portant part. Where the road surface is firm there is nodifficulty but in a soft field wonderful difficulty is experienceddue to the fact that the lugs of the drive wheels tear upthe earth and enable the drive wheels to move withoutmoving the engine. It is a typical belief that the driv^ewheel which has the sharpest lug is the a single which will

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FIG- 335—COMPENSATING GEARS 452 FARM MOTORS adhere to the ground the ideal. In almost all circumstances thisis not true, considering that the lug which is sharp is really apt to cutthrough the earth, while one particular which is dull or round anddoes not have such penetrating impact will pack the earthdown and as a result make far more resistance for itself whilepassing by means of the earth. Nearly each and every engine builderhas a style of lug of his own. Fig. 338 shows a newstyle of traction wheel which seems to be giving verygood final results. The more weight that can be put on tothe drive wheels of an engine the much better it will adhereto the ground, supplying the surface is firm sufficient tosupport the load. This makes the matter of place of the major axles upon theboiler an important element.When the boiler is rear-mounted it is apparent thatmore of the weight isthrown upon the frontwheels, which act as aguide, than when thePjg ^,g boiler is side-mounted. Hence a single would be led tobelieve that the side-mounted traction engine will havebetter

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Image from page 665 of “Electric railway overview” (1906)

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Identifier: electricrailwayr18amer
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 same gear ratio of which it is a modifica-tion. The brake has been on the industry significantly less than a month. TITAN GEARS. The material composing the Titan gears manufactured bythe Atha Steel Casting Company, of Newark, N. J., is so difficult that it cannot be reduce by anytool steel yet-recognized. Allfinished surfaces, such asteeth and hub-fit, are ac-curately ground to tem-plates. Although the ma-terial is difficult, it is notbrittle on the contrary itis so hard that test pieceshave been bent coldthrough an angle of 180degrees with no showingfracture. The gear is madesolid with the teeth castin, then a special machinegrinds the periphery of theteeth to the accurate di-ameter. One more machinegrinds every tooth to themaster, while nonetheless one more machine grinds out the hub-match and faces each sides. A gray iron or soft steel hub is thenpressed in at a pressure of 35 to 4.5 tons per square inch,and is bored out to the suitable size for forcing on the axle.

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Titan Gear. When arrangements were becoming made for the Louisianapurchase exposition, held in St. Louis, Mo., in 1904, a specialcommittee was appointed to think about the query of streetpaving. Soon after an exhaustive investigation Bitulithic wasselected for Lindell boulevard, the main thoroughfare whichled to the principal entrance to the exposition. The wisdomof this special committee later was indicated by the superiorjury of awards, which granted to Bitulithic the gold medalas the nearest approach to the best 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 beneath exceptional circumstances, but arail bond of such conductivity that the drop of prospective acrosstwo feet of bonded rail is less than the drop of potentialacross two feet of solid rail would undoubtedly appear to be theideal bond. Harold P. Brown, 120 Libe

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