Improvements in Car Brakes.
Year: 1890

page_text: Date of Application, 17th Mar., 1890-Accepted, 19th Apr., 1890
COMPLETE SPECIFICATION.
Improvements in Car Brakes.
We, OTTO FERDINAND POL, and HEINRICH FRIEDERICH KÜNZEL, both of Chemnitz,
Germany, Mechanical Engineers, do hereby declare the nature of our Invention for
"IMPROVEMENTS IN CAR BRAKES" and in what manner the same is to be porformed,
to be particularly described and ascertained in and by the following statement :-
The object of this Invention is to reduce the cost of construction and the number
of parts thereof, and to secure a more reliable and efficient brake which can be
depended upon in case of emergency-as hereinafter fully set forth and illustrated in
the accompanying Drawings,-the same letters of reference indicating corresponding
parts in each of the several figures:-
:-
Fig. 1 is a front elevation, of the improved car brake attached to a car.
Fig. 2 is a top view of the same.
Figs. 3 and 4 are enlarged detail views.
Fig. 5, a section through . y. Fig. 3.
Figs. 6 and 7 show a modification, in or out of operation.
A is a car, moving in the direction indicated by arrow, shown in Fig. 1.
B B are bearings for axles C C, to which are attached car-wheels D D'.
In the centre of the axle C is firmly secured the brake wheel a, by screws b, b.
On one side of the brake wheel and loose on the axle is a bar d, to which are
secured clamps e, f, in such a manner as to allow the wheel a to freely revolve, when
the brake is out of operation. In notch of har d rests point g' of lever which
latter is supported at g and held in its normal position by spring s
Against this end of the bar d presses spring s, secured either to stud m or to
bottom of the car A. The opposite end d' of bar d rests on a support i. The hole k
in the said bar, through which the axle passes is elliptical or of larger diameter than
the axle, the purpose of which will be more fully described.
Washer secured to the axle, holds the brake bar in position.
By means of line n, which passes over pulley n¹, all the brakes of the cars in a
train are connected and under control of the engineer.
In Fig. 1 a similar construction is shown with the addition of a lever, which allows
each brake to be operated independently.
The brake shown in Fig. 1-5 operates only, when the car is moving in the direction
shown by arrow in Fig. 1.
If it is required to move in either direction, two brakes working in opposite ways
have to bo attached to each car, only one of which will be in operation at a time.
In Fig. 6 and 7, a modification is shown, which will operate in either direction.
d, dare clamps, pivoted on bar i at points, ; H, H' is a lever movement,
connecting clamps ²d at points g¹ and pivoted at g.
When lever H is drawn upwards, the clamps are pressed apart and securely grip
the flanges of the brake wheel. If the lever is pressed downwards the effect would
be the same.
The operation of the car brake is as follows:
When the lever g with point g' is drawn out (either by the line n or by the hand
lever shown in Fig. 1) of notch h in bar d, the latter is pressed downwards by the
spiral springs and the clamps e, f securely grip the flanges of the brake wheel and
stop the car. On the lever g being released, the spring returns it to its normal
position and the wheels are free to revolve.
Fig. 3. shows the position of the brake out of operation, the axle revolves in the
upper part of the elliptical hole ;
Fig. 4. shows the position of the brake in operation, and the axle at the lower part
of the elliptical hole where it ceases to revolve.
[ Price Cul1

page_text: We do not intend to limit ourselves to the constructions shown, as various changes
can be made without departing from the principle of our invention.
Having now particularly described and ascertained the nature of our said inven-
tion, and in what manner the same is to be performed, we declare that what we
claim is:
1. The improved car brake consisting of a brake wheel a, firmly secured to the
axle, a clamping bar d with pressing springs, one end of the bar resting on a
support the other end in connection with a lever g,-all said parts substantially as
and for the purposes set forth and described.
2. The improved car brake consisting of a brake wheel, a two or more clamping
segments, pivoted on one end to a bar i (fig. 6 & 7.) and on the other end in
connection with a lever H, all said parts substantially as and for the purposes set
forth and described.
Seventeenth day of March 1890.
C. R. BONNE & Co.,
41, Eastcheap, E.C., Applicants' Agents.