Year: 1886

page_text: Date of Application, 2nd July, 1886.
Complete Left, 30th Mar., 1887.
Complete Accepted, 3rd May, 1887.
I THOMAS RUSSELL CRAMPTON of 4 Victoria Street in the City of Westminster
Civil Engineer do hereby declare the nature of this invention to be as follows:-
This Invention has for its object improvements in railway wheels or wheels for
vehicles running upon rails.
It is found that the tyres of railway wheels are soon worn hollow on the face which
comes into contact with the rail and when the tyres are-so worn the vehicle does not
run as smoothly as before the double incline produced on the tyre by the wear tending
to cause oscillation from side to side.
Now according to my invention I lessen the inequality of wear as well as the
tendency to oscillation by grooving the periphery on either side of the tread of the
wheel.
I form these grooves at such a distance apart as to limit the bearing surface or
tread of the wheel to the part between the grooves and so that the inner edges of the
grooves pass frequently on to and from the wearing surface or tread of the rail as
the wheel plays to and fro across the rail a distance due to the clearance between the
flanges and the rails.
This arrangement results in the immediate correction of any tendency for the edges
of the tread to be left high for the edge of the tread if high is immediately on passing
onto the tread of the wheel exposed to undue pressure and disproportionate wear
occurs until correction is effected.
I prefer that the wheel should be cylindrical in the tread but my invention is
applicable when the tread of the wheel is conical as is at present usual.
Although I prefer to groove the face of the wheel on both sides the groove on the
outer side or that away from the flange is less important than that on the flange side
and it may be omitted especially if the tyre be bevilled off on this side as is sometimes
practiced.
DL:1, 18e
CARPMAEL & Co.,
Agents for the Applicant.

page_text: Improvements in Railway Wheels or Wheels for Vehicles
Running upon Rails. ·
I, THOMAS RUSSELL CRAMPTON of No. 4 Victoria Street in the City of Westminster
Civil 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 :-
This invention has for its object improvements in railway wheels or wheels for
vehicles running upon rails.
It is found that the tyres of railway wheels are soon worn hollow on the face which
comes into contact with the rail and when the tyres are so worn the vehicle does not
run as smoothly as before the double incline produced on the tyre by the wear tending
to cause oscillation from side to side.
Now according to my invention I lessen the inequality of wear as well as the
tendency to oscillation by grooving the periphery on either side of the tread of the
wheel.
"
I form these grooves at such a distance apart as to limit the bearing surface or
tread of the wheel to the part between the grooves and so that the inner edges of the
grooves pass frequently on to and from the wearing surface or tread of the rail as
the wheel plays to and fro across the rail a distance due to the clearance between the
flanges and the rails.
This arrangement results in the immediate correction of any tendency for the edges
of the tread of the wheel to be left high for the edge of the tread if high is immediately
on passing on to the tread of the rail exposed to undue pressure and disproportionate
wear occurs until correction is effected.
I prefer that the wheel should be cylindrical in the tread but my invention is
applicable when the tread of the wheel is conical as is at present usual.
Although I prefer to groove the face of the wheel on both sides the groove on the
outer side or that away from the flange is less important than that on the flange side
and it may be omitted especially if the tyre be bevelled off on this side as is some-
times practiced.
The drawing shows a section of a wheel constructed in accordance with my
invention.
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:
The making of one or more grooves in the tires of railway wheels or wheels for
vebicles running upon rails for the purposes and in the manner substantially as
described.
Dated this 30th day of March 1887.