Abrasive tool making process – material – or composition – With carbohydrate or reaction product thereof
299 41, B24B 2300
A series of abrading contact elements for truing the bearing surface of a railway track, in which the abrading elements are moved one behind the other tangentially of the bearing surface of the rail to be abraded or ground. The elements are arranged in the form of two groups of two elements. One of the elements move away from the rail when the other moves towards the rail. Each of the two groups is mounted in one inclinable beam which are interconnected so that a change in the inclination of one of the beams causes a change in the inclination of the other beam. The elements of the two groups are always tangential to the radius of curvature of the rail including positive and negative radii, and a straight line. Each beam is rotatably mounted about its central point between two grinders of the respective group, and the adjacent ends of the beams are linked by means of crossed rods of equal length so that one beam tilts in one direction, the other beam tilts in the opposite direction. One of the pivot points allows for lateral displacement of the beam.
patent: 3707808 (1973-01-01), Danko et al.
patent: 3738066 (1973-06-01), Panetti
patent: 3918215 (1975-11-01), Scheucher
Frank Speno Railroad Ballast Cleaning Co. Inc.
Parker Roscoe V.
Speno International S.A.
Whitehead Harold D.
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