Improvements in Vulcanized India Rubber Springs for use in Locomotive Engines, Railway Carriages and Trucks, Tramway Cars, and other Vehicles.
Year: 1891

page_text: COMPLETE SPECIFICATION.
Improvements in Vulcanized India Rubber Springs for use in
Locomotive Engines, Railway Carriages and Trucks, Tramway
Cars, and other Vehicles.
I, JOHN EBENEZER HOPKINSON of 15 Walbrook, in the City of London
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 :-
My invention relates to an improved construction of an india rubber spring or
pad for use on locomotive engines railway carriages and trucks, tramway cars and
other vehicles, and consists essentially in the combination of one or more metallic
plates or rings, with a number of projecting india rubber pads, which may be of a
cylindrical or other suitable section on one or both sides of the metallic plate
or ring.
In applying my invention to an ordinary buffer or draw-bar I use a metallic
plate or ring of suitable thickness having a projecting flange and boss on either
side, the said boss being provided with a central hole through which the buffer bar
or rod passes. Around this boss are a number of perforations corresponding to
the size, shape and number of projecting pads required.
Vulcanized india rubber is moulded on to both sides of this metallic plate or ring
and through the perforations in the same, until the whole becomes flush or even
with the projecting flange and boss on both sides. From these surfaces the india
rubber continues and projects in the form of a number of distinct cylinders or pads
of any desired height.
In the case of a body pad or spring I use a flat metal plate of suitable size and
thickness having a number of perforations or openings into which the vulcanized
india rubber pad is moulded in a similar manner to that above described, but so as
to project only on one side.
In order that my invention may be the better understood, I will now proceed to
describe the same, reference being had to the accompanying sheets of drawings
upon which :-
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Fig. 1. represents a side elevation of my improved buffer spring fitted in metal
plate or ring.
Fig. 2. being a front view of same.
Fig. 3. is a transverse section through the metal plate or ring shewing perforations
in same.
Fig. 4. is a front elevation of the metal plate.
Figs. 5 and 6. represent side and front view of metal washer to be inserted
between rubber pads, when two or more are used.
Fig. 7. is an elevation shewing the general construction and arrangement of the
springs.
Fig. 8. represents a transverse section through a bearing spring or body pad
constructed according to my invention.
Fig. 9. is a plan of same as seen from above and
Fig. 10. illustrates the application of my invention to an existing form of
buffer.
A. being the metal plate or ring.
B is the flange on same.
Cthe boss

page_text: G the metal washer.
H metal plate for bearing spring or body pad.
1 vulcanized india rubber projecting pads in same.
Having now particularly described and ascertained the nature of my inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
The combination and use of vulcanised india rubber springs, consisting of a
number of distinct cylindrical or polygonal pads, projecting from and in combina-
tion with a plate or ring of metal or other suitable material; constructed combined
and arranged substantially as and for the purposes described and set forth in the
accompanying Specification and drawings.
Dated this 10th day of September 1891.