Arrangement to Admit of Pneumatic Cushioning in Railway Carriage Wheels.
Year: 1895

page_text: Date of Application, 29th Aug., 1895
Complete Specification Left, 23rd Apr., 1896-Accepted, 30th May, 1896
PROVISIONAL SPECIFICATION.
Arrangement to Admit of Pneumatic Cushioning in Railway
Carriage Wheels.
EUGENE LOGIER 46, Molesworth Street Dublin Civil Engineer, do hereby
declare the nature of this invention to be as follows:-
In the accompanying drawing, Fig. 1 represents the wheel half in cross section,
and Fig. 2 shews a half longitudinal section of same, from which it will be seen
that the body of wheel consists of a boss a, two outer retaining plates 6 b, two inner
retaining plates c c and an internal channel ring d, all of separate steel castings,
enclosing an Indian rubber pneumatic tube f, cased in hardwood packing e e e e¹.
Boss a is formed with seating for reception of outer retaining plates b b which
are secured to it by 1-inch wrought iron through bolts.
The inner retaining plates c c, which are fastened to the tyre in the usual
manner, are secured in position by means of -inch wrought iron bolts passing
through them and through the cast steel channel d (see Fig. 1) which also affords
additional support to the tyre.
Hardwood packings in radial segments e e e¹ el are closely fitted inside the outer
retaining plates and channel ring, through which they are bolted together, and so
arranged as to break joint at the diametrically opposite points of their contact
with the Indian rubber pneumatic tube f, to the circumference of which they have
been accurately curved on edge.
The tube is of sectional area calculated to resist displacement under a pressure
of more than 2 tons per, wheel; and having an excess of material above the
theoretical requirement will allow for extra stress due to break-action, etc.
It will be readily perceived that the pneumatic tube, inflated in the ordinary
way, is circumferentially supported by the continued curvature of outer plates,
hardwood packings, and the edges of inner plates and channel ring splayed so as
to impinge truly against surface of tube.
The cushioning action due to the pneumatic elasticity is uninterrupted by any
fastenings between the outer and inner retaining plates, which are thus purposely
left free of each other to allow of as much play as will be due to the compression
of the tube.
Dated this 28th day of August 1895.
EUGENE LOGIER, C.E., A. Inst. C.E.I.
COMPLETE SPECIFICATION.
Arrangement to Admit of Pneumatic Cushioning in Railway
Carriage Wheels.
I EUGENE LOGIER Surveyor, of 46, Molesworth Street, Dublin, 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:
P's
This invention relates to an improvement in the construction of wheels
especially intended for application to railway, tramway, and like heavy wheels,

page_text: and has for its object to provide an arrangement by which the wheels may be
rendered resilient without weakening them in any way, thus lessening the jolting
or shaking commonly experienced.
In carrying out my invention I propose to employ a pneumatic cushion formed
from a tube of rubber, leather or any other suitable material. This cushion
is placed within the rim of the wheel which is not connected rigidly to the central
portion.
The boss of the wheel is formed at each side with retaining plates extending
for a suitable distance and adapted to enclose the pneumatic cushion and hold
it in position. The rim or tyre is also formed with a retaining plate or ring
at each side the edge of which extends within the edge of the outer retaining
plates.
A channelled ring is provided between these retaining plates and packing of
wood or other suitable material is furnished within this channelled ring and also at
the inner side of the cushion.
In order that the invention may be more clearly understood, reference is had
to the accompanying sheet of drawings, in which Fig. 1 shows a wheel fitted with
my improvement, partly in side elevation and partly in cross section, Fig. 2 is a
view at right angles to the same partly in section and Fig. 3 is a cross section of a
modification.
To the boss A of the wheel which is formed with a suitable seating I secure
the retaining plates or rings B by means of the bolts 3 passing through the edge of
the plates and the boss. The outer portion 6' of these plates is curved or channelled
so as to receive the tube C formed of thick rubber or like material. This tube is
inflated through a valve of any ordinary construction in the manner well known in
connection with cycle tyres. Between the boss and the tube, I provide a packing
formed from a number of wooden blocks D placed radially and secured by means
of the bolts d passing through the plates B. The rim E of the wheel is provided
with the inner retaining plates or rings F the edges of which extend within the
edges of the plates B. Between the plates F and immediately within the rim, the
channelled ring G is fitted within which the packing blocks D₁ are placed arranged
similarly to the blocks D and secured by the bolts d'. Both sets of blocks are
arranged to break joint at opposite points of contact with the rubber tube and their
edges are curved so as to fit closely the surface of the tube.
According to the modification shown in Fig. 3 the boss A¹ of the wheel is
grooved to receive the inner surface of the pneumatic tube C¹ which is shown in
this case of elliptical form. The retaining plates B' are secured to the boss by
bolts band by set screws b².
The rim of the wheel is provided as in the other case with the inner retaining
plates F. The channelled ring G and the packing D' serve to receive the periphery
of the tube.
In both the arrangements shown a pneumatic tube is employed, but instead of
employing a tube may provide a number of pneumatic balls or segments the
other parts remaining the same. The thickness and other dimension of the tube
are calculated so as to resist displacement under the pressure depending upon the
weight of the carriage, and also to prevent any danger of injury from sudden strains
which may be put upon the wheel.
Owing to the arrangement of the plates and packing the tube is supported at
every point. The tube provides a resilient cushion between the rim of the body
of the wheel and owing to there being no fastening between the retaining plates
the action is quite free allowing the full benefit of the compression of the tube to
be obtained.
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 a wheel for railway carriages and other vehicles, the combination with a

page_text: pneumatic tube placed between the rim and the body of the wheel, of retaining
plates fitted to the boss and to the rim, substantially as and for the purposes
specified.
(2.) In a wheel for railway carriages and other vehicles, the combination with
a pneumatic tube fitted between the rim and the body of the wheel, of retaining
plates curved to fit the surface of the tube and secured to the boss and rim and
packing placed around the periphery of the tube, substantially as and for the
purposes specified.
(3.) In a wheel for railway carriages and other vehicles, the combination with
a pneumatic tube placed between the rim and body of the wheel, of retaining
plates bolted to the boss of the wheel at each side, inner retaining plates fitted
to the rim, a channelled ring between these plates and packing formed from
wooden blocks, placed at each side of the tube, substantially as and for the purposes
specified.
(4.) The improved wheel for railway carriages and other vehicles having a
pneumatic tube placed between the rim and body of the wheel, outer and
inner retaining plates fitted to the boss and rim, a channelled ring within the
rim and wooden blocks forming packing bolted at each side of the tube, substan-
tially as described and shown in the accompanying drawings and for the purposes
specified.
Dated this 23rd day of Anvil 1896
GEO. H. RAYNER,
37, Chancery Lane, London, Agent for the Applicant.