File:Science of railways (1916) (14574711137).jpg

Identifier: scienceofrailway14kirk (find matches)
Title: Science of railways
Year: 1916 (1910s)
Authors: Kirkman, Marshall Monroe, 1842-1921
Subjects: Railroads Transportation -- History
Publisher: Chicago : C. Phillips Co.
Contributing Library: University of Illinois Urbana-Champaign
Digitizing Sponsor: University of Illinois Urbana-Champaign

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ability to with-stand the fatigue incident to the constant handling of thelever. Thus the power reverse has been the means of greatlyincreasing the capacity of switching engines. The accompanying illustrations represent a well knownpower reverse gear, the invention of Mr. E. L. Ragonnet.This device has passed through the experimental stage and ispresented as a thoroughly practical solution of the powerreverse gear problem. The gear is preferably operated by air, although an auxiliarysteam connection is provided. Distribution is controlled byan ordinary D slide valve arranged for outside admission. Thepiston rod is connected to a crosshead, which is coupled tothe reverse shaft by means of a suitable reach rod. The cross-head gibs are held in place by a cast steel plate having anarm projecting downwards. This crosshead arm is connectedby a suitable link with the lower end of a floating lever. Theupper end of this floating lever is pivotly connected to, and 162 LOCOMOTIVE APPLIANCES. 16a
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164 LOCOMOTIVE APPLIANCES. supported by the valve stem, which in turn is carried by acylindrical guide. Through the agency of a rocker, the upperend of which is connected by a light rod with a small reverselever, and the lower end through a link with the floating levera short distance below the valve stem, the movement of thevalve is controlled from the cab. The rocker is provided withtappets which strike the ends of projecting set screws whenthe limit of travel of the valve is reached. These set screwsrequire no adjustment after the gear is properly applied, andmerely limit the throw of the reverse shaft arm in eitherdirection. The small reverse lever is locked in any desired positionby an ordinary toothed quadrant. Assuming the lever in midposition and the valve normally covering both ports; whenthe lever is moved into forward gear (to the right, referringto the drawing) the floating lever swings about its lower endas a fulcrum, and the slide valve is moved to the right, ad-mitting

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