Improvements in Dust Shields for Railway Axle Boxes.
Year: 1894

page_text: Date of Application, 31st July, 1894
Complete Specification Left, 5th Feb., 1895-Accepted, 4th Mar., 1895
PROVISIONAL SPECIFICATION.
Improvements in Dust Shields for Railway Axle Boxes.
I, HAROLD EDWARD LORD 124 Church Lane, Gorton, in the County of
Lancaster, Draughtsman, do hereby declare the nature of my invention to be
as follows:-
This invention is to protect the axle bearing from the entry of dust and grit.
It consists of an inner and outer ring, the inner ring being attached to or made
solid with the axle box, the outer being affixed to or made solid with the boss of
the wheel and revolving with it, or in some cases it may be attached to the axle.
The inner ring which is attached to the axle box projects towards the wheel say
for example about 1 inches, and is about 1 inch larger than the axle bearing, the
outer ring projects from the wheel boss and encloses the inner ring. It is made of
a coned or dish like shape, and is larger in diameter than the inner ring to keep
the parts out of contact when worn; clearance is also provided to allow of
lateral wear.
ROBT. F. DRURY, C.P.A.,
Bank Buildings, George Street, Sheffield, Agent for Applicant.
I, HAROLD EDWARD LORD 124 Church Lane, Gorton, in the County of
Lancaster, Draughtsman do hereby declare the nature of this invention and in
what manner the same has to be performed, to be particularly described and
ascertained in and by the following statement :-
The object of this invention is to protect the axle bearing from the entry of
dust and grit. It is illustrated in the annexed sheet of drawings in which,
Fig. 1, is a section of the axle box, showing the end of axle, and dust guard
or shield.
Fig. 2, side elevation of same.
Fig. 3, back of axle box, showing the inner ring of the dust shield.
The dust shield consists of two rings A, and B, the inner ring A, being fixed
to the back of the axle box C, and the outer ring B, being fixed to the boss
of the wheel D.
If desirable these rings may be made solid with the parts to which I have
described them as attached or affixed, but in practice I prefer to secure them by
means of screws passing through flanges made upon the rings. The inner ring A,
which is attached to the axle box C, projects towards the wheel, and is made of
larger diameter than the axle, such excess of diameter being at the top when
the brass bearing E, is new, so as to permit the axle to keep out of contact as
the brass wears away. The outer ring B, is preferably made of a conical form,
with an excess of space in the lower part to provide for the inner ring lowering
as the brass bearing wears.

page_text: Thus the two rings keep clear of one another during their alteration of position
due to the wearing away of the bearing and the neck.
The recess F, in which the inner ring is fixed also serves as an additional
protection to the entrance of dirt or dust.
The outer ring B, is made conical, so that wet and dirt is carried away by
gravitation from the space between the rings and thrown off away from the
entrance thereto.
I do not bind myself to the exact shape of the rings nor the method of fixing
them, they may also be reversed in their positions.
The outer ring may if desired be fixed upon the axle instead of upon the boss of
the wheel.
The advantage of this style of shield over others, is that it is frictionless and
economical, requiring no attention; its use dispenses with the shield grooves made
in the back of axle boxes for shield covers, which are also dispensed with.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same may be performed, I declare that what I
claim is :-
1. The improved dust shield for railway axle boxes, constructed as hereinbefore
described, and as shown in the drawings.
2. As a dust shield or protector for the axle necks of railway vehicles, a ring A,
fixed upon the back of the axle box, and an outer ring B, encircling the inner
ring A, fixed upon either the boss of the wheel, or the axle, substantially as
herein before described and shown.
Dated the 30th day of January 1895.
ROBT. F. DRURY, C.P.A.,
Bank Buildings, George Street, Sheffield, Agent for Applicant.