IMPROVE- MENT IN CHILLED CAST-IRON PEDESTALS OR AXLE BEARINGS FOR RAILWAY VEHICLES
Year: 1884

page_text: THOMAS ROBINSON SUMMERSON Haughton le Skerne in the County of Durham
Foundry Assistant do hereby declare the nature of my Invention for AN IMPROVE-
MENT IN CHILLED CAST-IRON PEDESTALS OR AXLE BEARINGS FOR RAILWAY
VEHICLES to be as follows:-
The pedestal or axle bearing hereinafter called the pedestal is made of any
ordinary shape and for the greater part from a quality of cast-iron best suited for
strength irrespective of its wearing qualities. The improvement consists in making
the chilled or wearing part from a different quality of iron to that which is used
for the main bulk of the pedestal hereinafter called the shell.
To secure this, the complete pedestal is cast at two operations. First the shell
is cast from soft or non-chilling iron and it only differs from an ordinary pedestal
in possessing a cavity which extends to nearly the full length of the wearing part
and which may be made of any convenient form or dimensions.
When the shell is nearly cold after the first operation of casting it is placed
upon a chill of similar shape to that which is used in the casting of an ordinary
chilled pedestal and then the hard or chilling metal is cast into the cavity and.
upon the chill through a hole which is left for that purpose in the shell.
DESCRIPTION OF DRAWING.

page_text: I THOMAS ROBINSON SUMMERSON Haughton le Skerne Darlington in the County
of Durham Foundry Assistant do hereby declare the nature of my Invention for
AN IMPROVEMENT IN CHILLED CAST-IRON PEDESTALS OR AXLE BEARINGS and in
what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:—
The pedestal or axle bearing hereinafter called the pedestal is made of any
ordinary shape and for the greater part from a quality of cast iron best suited for
strength irrespective of its wearing qualities.
The improvement consists in making the chilled or wearing part from a different
quality of iron to that which is used for the main bulk of the pedestal hereinafter
called the shell. To secure this the complete pedestal is cast at two operations.
First, the shell is cast from soft or non chilling iron and it only differs from an
ordinary pedestal in possessing a cavity which extends to nearly the full length of
the wearing part and which may be made of any convenient form and dimensions.
When the shell is cold or nearly so after the first operation of casting it is placed
upon a chill of similar shape to that which is used in the casting of an ordinary
chilled pedestal and then the hard or chilling metal is cast into the cavity through
an aperture which is left for that purpose in the shell.
DESCRIPTION OF DRAWING.
Fig. 1. is a side elevation and Fig. 2. a cross section of the pedestal when
I THOMAS ROBINSON SUMMERSON Haughton le Skerne Darlington in the County
of Durham Foundry Assistant do hereby declare the nature of my Invention for
AN IMPROVEMENT IN CHILLED CAST-IRON PEDESTALS OR AXLE BEARINGS and in
what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:-
The pedestal or axle bearing hereinafter called the pedestal is made of any
ordinary shape and for the greater part from a quality of cast iron best suited for
strength irrespective of its wearing qualities.
The improvement consists in making the cbilled or wearing part from a different
quality of iron to that which is used for the main bulk of the pedestal hereinafter
called the shell. To secure this the complete pedestal is cast at two operations.
First, the shell is cast from soft or non chilling iron and it only differs from an
ordinary pedestal in possessing a cavity which extends to nearly the full length of
the wearing part and which may be made of any convenient form and dimensions.
When the shell is cold or nearly so after the first operation of casting it is placed
upon a chill of similar shape to that which is used in the casting of an ordinary
chilled pedestal and then the hard or chilling metal is cast into the cavity through
an aperture which is left for that purpose in the shell.
DESCRIPTION OF DRAWING.
Fig. 1. is a side elevation and Fig. 2. a cross section of the pedestal when
"
completed. The chilled or wearing part is marked “a and may be made of any
convenient form or dimensions.
Having now particularly described and ascertained the nature of my said
Invention, and in what manner the same is to be performed, I declare that what
I claim is
A cast-iron pedestal or axle bearing with a cast-iron wearing part which is made
harder than the rest of the pedestal, the same wearing part being formed at a
second operation by running either hard or chilling iron into a cavity which is
formed to receive it at the first operation.
Dated this 19th day of July 1884.