Improvements in Road Rollers.
Year: 1893

page_text: Date of Application, 20th Apr., 1893
Complete Specification Left, 18th Aug., 1893-Accepted, 30th Sept., 1893
PROVISIONAL SPECIFICATION.
Improvements in Road Rollers.
I, FREDERICK JOHN BURRELL, of Saint Nicholas Works, Thetford, in the
County of Norfolk, Engineer, do hereby declare the nature of this invention to be
as follows:-
The object of my invention is to effect an improvement in the arrangement of
5 the front fork and bearing of road rollers, and in order to carry out this invention
I arrange a saddle attached to and forming a support for the front of the engine.
In the said saddle is arranged a vertical pivot which is attached to and forms part
of the fork carrying the front rollers, this pivot has a die at the top in the usual
Provision is made in the saddle to allow the vertical pivot to rock
10 laterally to accommodate itself to the irregularities in the surface of the road. In
order to do this the saddle is provided with a suitable bearing to receive a curved
collar of a peculiar shape on the neck of the pivot shaft adjoining the fork.
manner.
It will be understood that the shapes, materials and proportions of the parts with
such modifications as found necessary may be varied in many ways within the scope
15 of my invention.
Dated this 20th day of April 1893.
J. P. BAYLY,
18, Fulham Place, W., Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Road Rollers.
I; FREDERICK JOHN BURRELL, of Saint Nicholas Works, Thetford, in the
County of Norfolk, 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 my invention is to effect an improvement in the arrangement of
the front fork and bearing of road rollers, and in order to carry out this invention'
I arrange a saddle attached to and forming a support for the front of the engine.
In the said saddle is arranged a vertical pivot which is attached to and forms
part of the fork carrying the front rollers, this pivot has a die at the top in the
usual manner.
Provision is made in the saddle to allow the vertical pivot to
rock laterally to accommodate itself to the irregularities in the surface of the road.
In order to do this the saddle is provided with a suitable bearing to receive a
curved collar of a peculiar shape on the neck of the pivot shaft adjoining
the fork.
And in order that my invention may be thoroughly understood, I now proceed
to describe the accompanying drawing thereof, reference being had to letters and
figures marked thereon.
Fig. 1, is a front elevation with a part of the saddle in section.
Fig. 2, is a side elevation partly in section.
0
Figs. 3, and 4, shew a modification of the above differing in the form of the
curved collar.
Parts of the various figs. are broken off for want of space.
In Figs. 1, and 2, the front rollers R, R, are arranged to revolve upon the axis B
which is carried by the fork C. The fork C has a vertical spindle or pivot D
formed upon it, this vertical spindle or pivot shaft D revolves in a curved collar E
which forms a deep bearing for the lower portion of the pivot shaft D next to the

page_text: fork C. This collar E has two curved portions upon it F', F', in Figs. 1, and 2,
and F³, and F, in Figs. 3, and 4, which take a bearing against suitably formed
portions of the saddle G which has cheeks H, H, formed upon it at the back and
front of the collar E. The saddle G is attached to and carries the front part of
the smoke-box of the roller, and the weight of the engine comes upon the curved
portions of the collar E and the cheeks, H. To enable the vertical spindle.or
pivot shaft to rock to the positions a, a, the top portion of the saddle G is slotted
transversely as shewn in Figs. 1, and 3, and the vertical pivot shaft D carries at its
upper end a die J which slides in the slot in the saddle G. In Fig. 1, the axis X
upon which the pivot shaft rocks transversely to the positions a, a, is situated
below the curved portions F1, F.
In Fig. 3, the axis ✗ is situated above the curved portions F3, F4, but'in each
case the collar E is able to rock radially about the axis ✗ upon the curved
portions of the cheeks H, H. The edges K of the saddle G form stops for the
fork C when in its extreme positions a, a, in Figs. 1, and 3. By this construction
a deep bearing is obtained at E for the lower end of the pivot shaft D, and conse-
quently increased durability is the result. The shaft D being able to turn in the
bearings E and J and the curved portion of the rocking surfaces F1, F2, F3, F',
also provide increased bearing surface whilst allowing the rollers R, R, to
accommodate themselves to uneven surfaces in the road.
I am aware that it has been customary in road rollers to repair the slackness
caused by wear in the saddle through which the pivot shaft works by putting in a
collar with a slight curve differing considerably from the curved collar herewith
illustrated in the accompanying drawing; but I am not aware that a curved collar
on the neck of the pivot shaft adjoining the fork as illustrated and described in 1
this Specification have ever been done before.
It will be understood that the shapes materials and proportions of the parts with
such modification as found necessary may be varied in many ways within the scope
of my invention.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. In road rollers, the combination of the saddle with a suitable bearing to
receive a curved collar on the neck of the pivot shaft adjoining the fork and the
collar with the curved portions upon it F, F, F³, and F¼, substantially as herein
described and according to the accompanying drawing.
2. In road rollers, the curved collar and the bearings in the saddle, substantially
as herein described and for the purpose specified.
3. In road rollers, the bearings formed in the cheeks at the back and front of the
saddle to receive the curved collar, substantially as herein described and according
to the accompanying drawing.
4. In road rollers, the collar E with the curved parts F1, F2, F³, and F, to take a
bearing against the cheeks of the saddle, substantially as herein described and
according to the accompanying drawing.
Dated this 18th day of August 1893.
J. P. BAYLY,
18, Fulham Place, W., Agent for the Applicant.