Improvements in the Manufacture of Guide Plates, or other Forged Articles having One or more Branches, which have hitherto been Manufactured by means of Welding.
Year: 1891

page_text: Date of Application, 5th June, 1891-Accepted. 11th July. 1891
Date of Application, 5th June, 1891-Accepted. 11th July 1891
COMPLETE SPECIFICATION.
Improvements in the Manufacture of Guide Plates, or other Forged
Articles having One or more Branches, which have hitherto been
Manufactured by means of Welding.
I, EUGENE LEBLOND of Charleville (Ardennes) in the Republic of France,
Engineer, do hereby declare the nature of this invention and in what manner the
same is to be performed, to be particularly described and ascertained in and by the
following statement :-
The object of this invention is an improved process by means of which forged
articles having one or more branches, such as guide plates, can be manufactured
without their being any need of welding.
The peculiarity of the invention consists in the separation, whilst cold, of these
branches by means of a groove or hollow, which is produced during the process of
rolling the bar from which these articles are to be made, by providing such a
groove or hollow, the branches can be cut out and separated, and the final shape
then given to them without welding.
By means, therefore, of this new process, welding may be avoided, which often
is undesirable, and, further, steel may be employed for the work, the use of which
is greatly to be preferred in certain cases, for instance, in the case of such articles
as have to resist considerable strains.
This new process is applicable for the manufacture of all kinds of articles of
this sort, but, in order that it may be clearly understood, its application will be
inore particularly described, but only by way of example, in connection with the
manufacture of guide plates and triangles for brake blocks.
Reference being had to the accompanying sheet of drawings and to the figures
and letters of reference marked thereon, in these:
Figures 3 and 5 represent, the first, the type of guide plate employed by the
Western, Southern, State, and Paris, Lyons and Mediterranean Railway Companies
(of France), the second, the double type of guide plate employed by the Eastern
Railway Company (of France).
Figure 1 is an elevation of the flat bar rolled to form the type of Figure 3,
Figure 4 is a similar view for the type of Figure 5,
Figure 2 is a section, on the line GH, of Figure 1,
Figures 6 and 7 are front and side views of the rolls employed for producing
such bars.
The same reference letters indicate like parts in the various figures.
In carrying out this process, a bar of iron or steel having a channel or
groove A B, A' B', is produced by means of rolls. For this purpose, a cylinder
CC (Figures 6 and 7) is employed, for rolling, the ridges D D₁ of which, corre-
sponding to the grooves A B, A' B', have exactly the same formn as these grooves,
and in that part corresponding to the middle of the length of the ridge, the radius
of the cylinder R is made greater than the radius of the check, thereby allowing
a reserve of metal to be produced. The part must be made of suitable length,
so that a sufficient thickness of metal may be obtained for the branches. The space
separating the ends of the ridge D D' will produce the ends E E¹ of the plate.
This cylinder or roll, revolving against another flat or grooved cylinder or roll,
will, it is evident, produce the bar with the depressions, as shown in Figure 2,
and also with the parts without the depressions. In the bottom of the furrow A B,
there will be a little seam or burr K, which may be easily removed.
In order to produce the finished plate, it will be then only necessary to cut the
part L of the bar in the middle and to bend the part M to a template. By giving
an additional thickness to the metal, as shown in Figure 2, the curve N can be
[Run al

page_text: formed without it being too thin. If the branches P P¹ are not sufficiently
developed by rolling, they may be lengthened, as the cylinders or rolls will have
allowed a sufficient quantity of metal therefor, it will therefore be an easy matter
to produce the form shown in Figure 3.
Whatever form the guide plates may have, and whether they be in one piece as
shown in Figure 3, or in two parts as shown in Figure 5, and whether their
thickness and length are irregular or not, it is evident that they can be rolled in a
manner suitable for their manufacture.
By doing away with welding, a greater security is obtained, and by the use of
steel, more durability.
The waste represented by the part 2 may be avoided by giving, at this part, the
entire breadth to the bar and by drawing it out in order to obtain the feet E E of
the plates, Figure 3.
Figures 8, 9, 10 and 11 represent-
Figure 8 the elevation of a brake block,
Figures 9 and 11 elevations of a rolled bar for making these brake blocks,
Figure 10 a transverse section of one of these same bars across line d of
Figure 9.
These brake blocks have hitherto been made by being welded in three places,
at a be, as shown in Figure 8; by the present process, they need only be welded
in two places, at ab, by employing metal rolled as shown in elevation in Figure 9,
and in section on line d in Figure 10. In case the diameter of the rolling cylinder
would have to be made too large in consequence of the length of the triangle, bars,
such as shown in Figure 11, may be rolled, that is to say, with the sole difference
that a block of iron M is made in the middle of the bar which, when drawn out, is
capable of forming the long part of the triangle.
Only, in this case, the little branches will be shorter and weldings must be made
at a' and '.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. The improvement in the process of manufacturing forged articles having one
or more branches, consisting essentially in separating the branches of such articles,
whilst cold, by means of a groove or hollow made, during the rolling operation, in
the bar intended for producing these articles, by means of which groove or
hollow the branches can be cut out or separated, and to which their final
form is then given without welding, all substantially as hereinbefore described
and shown.
2. In the manufacture of articles in accordance with the process described in
Claim 1, performing the rolling operation in such a way as to leave all the thick-
ness of metal which may be desired at the point where it may be necessary to
afterwards produce an extension of the manufactured article, substantially as
described in the above Specification and shown on the annexed drawing.
Dated this 4th day of June 1891.
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Agents for the Applicant.