. The railroad and engineering journal . nish writings, the bibliography of scien-tific, especially astronomical, literature, modern library meth-ods, and systems of classification. The examination for com-puters will include algebra, geometry, logarithms, trigonometry,and elementary astronomy. These examinations may be taken at any date and placenamed in the schedule of the commission, A special date willbe fixed at Washington as soon as a sufficient number of appli-cations is received to justify it. Recent Patents. mgiehans rail-joint. A NEW form of rail-joint is covered by patent No. 431,61
. The railroad and engineering journal . nish writings, the bibliography of scien-tific, especially astronomical, literature, modern library meth-ods, and systems of classification. The examination for com-puters will include algebra, geometry, logarithms, trigonometry,and elementary astronomy. These examinations may be taken at any date and placenamed in the schedule of the commission, A special date willbe fixed at Washington as soon as a sufficient number of appli-cations is received to justify it. Recent Patents. mgiehans rail-joint. A NEW form of rail-joint is covered by patent No. 431,611,issued to Isaac S. McGiehan, of New York. This is shown infigs. 17-19, fig. 17 being a cross section, fig. iS a side viewwith the clamps removed, fig. 19 an elevation of the jointcomplete. In constructing this joint a piece of channel-beam iron istaken, as shown in cross-section at A, fig. 17, the requisitesize and the ends of its sides cut out, as shown at c c, figs. 18and 19, so that it will rest upon two cross-ties, one end on each. McGIEHANS RAIL-JOINT. tie. as shown in figs. 18 and 19, with the sides of the channelextending downward between the ties to form a truss and at thesame time providing a flat upper surface for the rail ends torest upon. Two clamps are then provided, as E E, figs. 18 and19, formed, as shown in cross-section, with two jaws, onerunning along its top edge and the other running along itslower edge, as shown at m and «. The jaw » fits under andengages with the lower side of the channel-bridge A, and the Vol. LXV, No. 6.] ENGINEERING JOURNAL. 279 jaw m passes over the rail-base. After these are in place, thebolts </are passed through the clamps and sides of the channel-beam bridge, and when these are drawn together the jaws mslide up on the rail-base until the rail is finally seated upon thechannel-beam bridge, and by utilizing the bevel of the rail-baseas a wedge for the jaws m to slide over, together wiih the boltsd, sufficient clamping force is
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectrailroa, bookyear1887
