. Cross tie forms and rail fastenings with special reference to treated timbers . that this would probably prove too slow forAmerican conditions, and on that account a machine was devised which would allow of a more rapid screwing in than with the laborioushorizontal machine. Such a machine is the one illustrated in figs. 48and 49. The detailed design for this machine was drawn by L. Smith, of the Worcester Polytechnic Institute, Worcester,Mass. This machine may be described as follows: In figures 48 and 49 (A)is a tripod frame, 2 feet of which (E) and (F) are clamped to therail, while
. Cross tie forms and rail fastenings with special reference to treated timbers . that this would probably prove too slow forAmerican conditions, and on that account a machine was devised which would allow of a more rapid screwing in than with the laborioushorizontal machine. Such a machine is the one illustrated in figs. 48and 49. The detailed design for this machine was drawn by L. Smith, of the Worcester Polytechnic Institute, Worcester,Mass. This machine may be described as follows: In figures 48 and 49 (A)is a tripod frame, 2 feet of which (E) and (F) are clamped to therail, while the third foot (D) rests on the tie. The tripod is adjust-able, so that it may be used on different sizes of rails. Its adjustabilityis such as to permit a vertical position of the sliding column or sleeve(B) and the rotating shaft (C) for all sizes of rails to which themachine is adapted. To allow of this adjustment for different sizesof rails and to allow for variations in the level of the upper surfaceof the tie, the foot (D) is made adjustable on the leg (L). To allow of. Fig. 47.—Electrical machine for inserting dowels or screw-spikes. 54 CROSS-TIE FORMS AND RAIL FASTENINGS. adjustment far different sizes of rails the two parts (E) and (F) of theframe have adjustable slide blocks, as shown at (G) and (H). Theseslide blocks can be adjusted so as to prevent motion of the machinecrosswise on the rail, and also so as to locate the axis of the rotatingshaft (C) in its correct position relative to the flange of the rail. Theslide block (H) has a protecting arm (K). which supports a swingingpiece (I). Attached to the piece (I) is an ajustable screw (J) whichpermits the hook (IJ) to be adjustable for different sizes of rail object of the combined hook (IJ) is to prevent the tripod footlifting from the rail. When the machine is canted on the rail byraising the leg (L), the hook (IJ) by action of gravity swings freefrom the rail, and the machine can be slid along the ra
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectwoodpre, bookyear1904
