. Railway master mechanic . ointed master car-builder ofthe Michigan It is reported that Mr. H. Tandy, superintendent of mo-tive power of the New York, Ontario & Western, has re-signed. An apparatus for measuring and registering thevertical oscillations of locomotives will not be without interest to our readers. Such an apparatus wasexhibited at the Paris exposition by the WesternRailway Company of France, and we give illustra-tions of two forms of it, together with diagrams show-ing the form of record produced by them. The ap-paratus registers the vertical oscillations of the footpla
. Railway master mechanic . ointed master car-builder ofthe Michigan It is reported that Mr. H. Tandy, superintendent of mo-tive power of the New York, Ontario & Western, has re-signed. An apparatus for measuring and registering thevertical oscillations of locomotives will not be without interest to our readers. Such an apparatus wasexhibited at the Paris exposition by the WesternRailway Company of France, and we give illustra-tions of two forms of it, together with diagrams show-ing the form of record produced by them. The ap-paratus registers the vertical oscillations of the footplate of the locomotive relative to the leading axleboxes, or in other words, the vertical play of thespring, and has been in use by the railway namedsince 1879. From an account of these devices appear-ing in London Engineering, we abstract the follow-ing descriptive note: Fig. 1 shows an arrangement in which a connectionto the axle box imparts an oscillatory movement toan arm which is connected by a rod to a carrier slid-. ing on a horizontal bar, this carrier being providedwith a marking point which bears upon a thin zincplate coiled on the drum shown, this plate beingcoated with a protective varnish which is scratchedoff by the point. The oscillations of the arm whichactuates the marking point also imparts, by meansof the ratchet and gear shown, a rotary and also aslow longitudinal movement to the drum carryingthe zinc plate. Another marking point, s, actuatedby a rod leading to the footplate, serves to mark byhand on the zinc plate tbe time of passing each kilo-meter post. After their removal from the drum thezinc plates are submitted to the action of acid, whenthe parts from which the protective varnish has beenscratched off are etched away and an engraved plateobtained from which a print can he taken.
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Keywords: ., bookcentury1800, bookdecade1870, bookidr, booksubjectrailroadcars
