Year: 1895

page_text: I, HEINRICH BÜSSING of 41, Elmstrasse, Brunswick, in the Empire of Germany,
Engineer, do hereby declare the nature of this invention to be as follows:-
This invention has for its object an improved brake shoe, slipper or drag and is
shown in the accompanying drawings, in which :-
Figure 1 is a side elevation of the brake shoe ;
Figure 2 a plan view;
Figure 3 a front elevation and
Figure 4 a cross section of the same.
This improved brake shoe differs from those hitherto employed, by the following
characteristics―
1. By a spring F on the outside. It easily happens that a brake shoe which
rests on the rail before being engaged with the wheel, may be pushed out of its
position by the shaking of the rail or other cause. In order to prevent this draw-
back, a spring F is employed which by resting on the rail prevents the brake shoe
from turning over, and which, when the shoe or slipper is carried along by the
wheel, easily avoids by reason of its flexibility in all directions any obstacles which
it may meet.
2. By a horizontal termination of the tongue point A B. As soon as the wheel
has passed over the edge A, it presses with its entire weight on this horizontal
piece and thereby prevents any tendency arising as in the older arrangements to
push the brake shoe along in front of the wheel. This horizontal surface A B
therefore, in short, prevents the brake shoe being pushed along by the wheel.
3. By a flange D carried very far to the front, which flange has a double
action.
(a) In the ordinary brake shoes hitherto employed, the points were very easily
bent up, as the surface travelled on by the wheel received a blow from the shock
of the wheel encountering it, thus causing a bending up of the shoe in a vertical
plane. This drawback is avoided by the flange D which serves as a stiffening
ridge so that in such a brake shoe the bearing line A B C need only lie very little
over the rail, as the otherwise necessary quantity of material is replaced by the
flange. This flange may of course also lie on the outside of the track or on both
sides. It is only necessary that the flange be carried forward up to the point at
which the wheel runs onto the shoe.
(b) The effect of such a flange is also such that the wheel flange already projects
so far over the tongue point of the brake shoe, before the tread of the wheel
reaches the point A, that the flange D is gripped between the head of the rail and
the inner surface of the wheel flange, see Figure 4. In consequence of this the
tongue point is already secured in position before the wheel comes thereon, so that
such point cannot shift sideways, and the gripping which takes place also prevents
the brake shoe being pushed along the rail on encountering the wheel. It is of
course necessary for this action that the flange be arranged on the inner side of the
track. It needs however only to be carried so far to the front that at the moment
when the tread of the wheel comes in contact with the point A of the tongue,
.

page_text: the front edge of the flange already lies within the annular space formed by the
outer circumference of the wheel flange.
Dated this 17th day of June 1895.
WM. P. THOMPSON & Co.,
Of 6 Lord Street, Liverpool, Agents for the Applicant.
I, HEINRICH BÜSSING of 41, Elmstrasse, Brunswick in the Empire of Germany,
Engineer, do hereby declare the nature of this invention and in what mauner
the same is to be performed, to be particularly described and ascertained in and by
the following statement :-
This invention has for its object an improved brake shoe, slipper or drag and is
shown in the drawings accompanying the Provisional Specification, in which-
Figure 1 is a side elevation of the brake shoe;
Figure 2 a plan view;
Figure 3 a front elevation, and
Figure 4 a cross section of the same.
This improved brake shoe differs from those hitherto employed, by the following
characteristics-
1. By a spring F on the outside. It easily happens that a brake shoe which rests
on the rail before being engaged with the wheel, may be pushed out of its position
by the shaking of the rail or other cause. In order to prevent this drawback, a
spring F is employed, which, by resting on the rail, prevents the brake shoe from
turning over, and which, when the shoe or slipper is carried along by the wheel
easily avoids by reason of its flexibility in all directions any obstacles which it
may meet.
2. By a horizontal termination of the tongue point A B. As soon as the wheel
has passed over the edge A, it presses with its entire weight on this horizontal
piece and thereby prevents any tendency arising as in the older arrangements to
push the brake shoe along in front of the wheel. This horizontal surface A B
therefore, in short, prevents the brake shoe being pushed along by the wheel.
3. By a flange D carried very far back, which flange has a double action,―
(a) Iu the ordinary brake shoes hitherto employed, the points were very easily
bent up, as the surface travelled on by the wheel received a blow from the shock
of the wheel encountering it, thus causing a bending up of the shoe in a vertical
plane. This drawback is avoided by the flange D which serves as a stiffening
ridge, so that in such a brake shoe the bearing line A B C need only lie very little
over the rail, as the otherwise necessary quantity of material is replaced by the
flange. This flange may of course also lie on the outside of the track or on both
sides. It is only necessary that the flange be carried forward up to the point at
which the wheel runs onto the shoe.
(b) The effect of such a flange is also such that the wheel flange already projects
so far beyond the tongue point of the brake shoe, that before the tread of the
wheel reaches the point A, the flange D is gripped between the head of the rail
and the inner surface of the wheel flange, see Figure 4.
In consequence of this
the tongue point is already secured in position before the wheel comes thereon, so
that such point cannot shift sideways, and the gripping which takes place also
prevents the brake shoe being pushed along the rail on encountering the wheel.
It is of course necessary for this action that the flange be arranged on the inner
side of the track. It needs however only to be carried so far back that at the
moment when the tread of the wheel comes in contact with the point A of the

page_text: tongue, the front edge of the flange already lies within the annular space formed
by the outer circumference of the wheel flange.
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. A brake shoe or slipper having on its outer side a spring bearing on the rail
and yielding in all directions substantially as described.
2. A brake shoe, characterized by the part (A B) following the first point of
contact (A) being formed horizontal, substantially as described.
3. A brake shoe having a flange bearing sideways against the rail ou its outside,
inside or even on both sides, said flange being carried so far back that when the
tongue point is first encountered by the wheel, said flange already lies within the
annular space formed by the outer circumference of the wheel flange, substantially
as described.
Dated this 13th day of March 1896.
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool, Agents for the Applicant.