IMPROVEMENTS IN FINISILING-ROLLS FOR THE MANUFACTURE OF IRON RAILWAY-SLEEPERS
Year: 1884

page_text: I, ADOLF MÄRKLIN, Engineer, residing in Hoerde, kingdom of Prussia, do hereby
declare the nature of the said invention for "IMPROVEMENTS IN FINISILING-ROLLS
FOR THE MANUFACTURE OF IRON RAILWAY-SLEEPERS" to be as follows:
In sleepers for railways it is customary to impart to the bearing points of the rails
a certain incline, so as to cause the rails to lean towards each other. In sleepers
made of iron or steel this incline has hitherto been produced subsequent to the
rolling process and to the division of the rolled bars, either by bodily bending the
sleeper without altering its sectional form, or by raising to the required angle the
bearing portions of the upper surface of the sleeper by a stamping-operation.
The object of my invention is to form the said inclines on the sleepers in the
finishing operation of the rolling-process. For this purpose I provide the last groove
of one of the finishing-rolls with recesses corresponding to the portions of the sleeper
which are to be raised, and the cooperating part of the other roll with projections
constituting the counter-part of the recesses. In the last pass of the bar between
the rolls the said projections will then press parts of the top of the sleeper into the
recesses and thus form the inclines.
If preferred the sleepers may be made with inclined projections on their outside,
while on the inside they are straight, i.e. without any recess corresponding to the
outer projection. In this case the roll for the outer or upper surface of the bar is
provided with recesses as before, while the other roll is made perfectly circular.
ILD

page_text: 1, ADOLF MÄRKLIN, Engineer, residing in Hoerde, kingdom of Prussia, do hereby
declare the nature of the said invention for "IMPROVEMENTS IN FINISHING-ROLLS
FOR THE MANUFACTURE OF IRON RAILWAY SLEEPERS," and in what manner the same
is to be performed, to be particularly described and ascertained in and by the
following statement:―
In sleepers for railways it is customary to impart to the bearing points of the
rails a certain incline, so as to cause the rails to lean towards each other. In
sleepers made of iron or steel this incline has hitherto been produced subsequent to
the rolling process and to the division of the rolled bars, either by bodily bending
the sleeper without altering its sectional form, or by raising to the required angle
the bearing portions of the upper surface of the sleeper by means of a stamping-
operation.
The object of my invention is to form the said inclines on the sleepers in the
finishing operation of the rolling-process. For this purpose I provide the last
groove of one of the finishing-rolls with recesses corresponding to the portions of the
sleeper which are to be raised, and the cooperating part of the other roll with
projections constituting the counter-part of the recesses.
A pair of rolls of this description is shown by Fig. 1 of the annexed sheet of
drawings in front elevation and by Fig. 2 in an end-view. Fig. 3 is a longitudinal
section of a sleeper produced by the said rolls, while Figs. 4 and 5 are transverse
sections thereof on the lines 1, 1 and 2, 2 respectively. The lower roll A for the
outer or upper surface of the bar, has in its groove a the recessed portions c cor-
responding in form and reciprocal distance to the raised parts ef of the sleeper,
while the upper roll B is provided on its elevated part b with the projections d
adapted to press the said parts ef into the recesses c of the roller A. By these
means the required inclined bearing surfaces for the foot of the rails are formed
during the last pass of the bar between the rolls.
If preferred the sleepers may be rolled with the inclined projections ef on their
outer top surface, while their inner surface is straight, so that the portion of
increases in thickness from e to the highest point and then diminishes again. In
this case the roll A is provided with the recesses c as before, whereas the other roll
is made circular.
The bars rolled in the manner described, and which ordinarily contain from 9 to
10 sleepers, are subsequently divided by saws or other means, and finally the
sleepers are straightened if necessary.
Having now particularly described and ascertained the nature of my said
invention and the manner in which it is to be performed, I declare that what
I claim is
1. In the manufacture of iron and steel sleepers, the employment of finishing-
rolls one of which is provided with recesses adapted to form, during the rolling-

page_text: operation, in the top of the sleeper, raised and inclined portions, serving as bearing
surfaces for the foot of the rails; substantially as hereinbefore described.
2. The combination with the roll A having the recesses a, of the roll B provided
with projections & corresponding to the recesses a, as and for the purposo
described.