. American engineer and railroad journal . LINK GRINDER FOR STEPHENSON LINKS. the swivel bracket on the radius bar. This radius bar is ordi-narily furnished about 7 feet long, although it may be madelonger if desired. The radius bar has graduations every 3 in.,and by using a scale in connection with this, it is possible toquickly and accurately adjust it for any radius. The work is placed on parallel strips and is clamped to thetable, as shown in one of the sketches. If a large number of thelinks to be ground are of a standard design the setting of thework may be greatly facilitated by providi
. American engineer and railroad journal . LINK GRINDER FOR STEPHENSON LINKS. the swivel bracket on the radius bar. This radius bar is ordi-narily furnished about 7 feet long, although it may be madelonger if desired. The radius bar has graduations every 3 in.,and by using a scale in connection with this, it is possible toquickly and accurately adjust it for any radius. The work is placed on parallel strips and is clamped to thetable, as shown in one of the sketches. If a large number of thelinks to be ground are of a standard design the setting of thework may be greatly facilitated by providing a special chuck forthese. Link blocks may also be easily clamped to the table andground. Vertical and horizontal motions to the grinding wheel are ob-tained by means of the two hand wheels. The machine may beconverted into a surface grinder by removing the radius bar andinserting an additional pin, thus fastening the two tables to-. METHOD OF CLAMPING WALSCHAERT LINKS ON TABLE OF GRINDER. gether. The upper table is 36 in. long, exclusive of the endpockets, 14 in. wide and has two T slots for ¥$ in. bolts. Thefloor space required, exclusive of the radius bar, is 4 ft. 4 in. by3 ft. 6 in. The machine weighs 2,200 lbs. and is manufactured byH. G. Hammett, Troy, N. Y. For a number of years Mr. Hammett has also manufactureda link grinder, which is especially adapted for grinding Stephen-son links. As shown in one of the illustrations, it consists of a wall bracket at the end of wheh is a long vertical bar upon whichthe carriage, carrying the pivot upon which the radius bar swings,may be adjusted. The grinding wheel frame is placed on a link is hung on the two hooks, as shown. To make surethai the bolts which these hooks engage are centrally located inthe holes, taper washers are used and these are bored 1/32 center, making it possible to adjust for uneven wear in thelink, or warping due to case-harde
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectrailroadengineering
