Improvements in Self Acting Brakes for Locomotives and Railway Vehicles.
Year: 1894

page_text: Date of Application, 31st May, 1894-Accepted, 18th Aug., 1894
COMPLETE SPECIFICATION.
Improvements in Self Acting Brakes for Locomotives and Railway
Vehicles.
We, JOHANN KUBAN, Works Foreman, of No. 5 Neue Königsstrasse, and
THEODOR DEUBLE, Foreman of Fitters, of No. 101 Chausseestrasse, both of
Berlin, Germany, do hereby declare the nature of our invention and in what
manner the same is performed to be particularly described and ascertained in and
by the following statement :-
The object of the present invention is to provide locomotives with a self acting
brake device, by means of which the said locomotive shall be prevented from
running off the lines. This object is attained by a vertically sliding spring pressed
lever arranged at the back of the locomotive and having its lower end just above
and over the top of the rails. This lever is connected up to the brakes of the
wheels by a lever system hereinafter more particularly described and comes into
action when the front part of the locomotive is raised to leave the line. Thus in
traversing curves, when the train runs off the lines, this takes place in that the
front wheels of the locomotive by sudden friction get lifted out of the rails, at the
moment however the front part of the locomotive is lifted, the back part is
depressed, the motion of the locomotive taking place by its being tilted on a pivot
formed by the back axle. In the present invention this motion of the whole body
of the locomotive is employed to press the vertical lever herein before motioned
against the top of the rail and whereby the same is actuated vertically upwards
operating the brakes by means of the lever system before mentioned. In addition
to the brakes the lever system is adapted to operate a skid arranged at the rear of
the second axle and adapted to contact with the foot of the rails, acting as a guide
to retain the locomotive in position in the rails.
In order to prevent the impetus of the carriages from forcing the locomotive out
of the rails in spite of the brake a buffer brake is arranged on the same, so that
immediately the brake of the locomotive acts, the buffer brake will also be operated
at each of the carriages.
And in order to make the present Specification more easily intelligible reference
is had to the accompanying drawings in which similar letters denote similar parts
throughout the several views :-
Fig. being an elevation of a locomotive provided with the self acting
brake,
Fig. 2 a side elevation. of a carriage having a buffer brake,
Fig. 3 detail side and end elevations of the skid and its operating mechanism,
and
Fig. 4 a detail side elevation partly in section of the vertically sliding lever.
To the rear end of the locomotive frame is attached a suitable bracket, carrying
a vertical lever or arm badapted to slide in the same and having a skid a at its
lower end, which terminates just above the top of the rail. In this position the
said vertical arm is normally held by a spring I of suitable strength, below the said
spring I the said arm is provided with a slot in which the horizontal arm of a
double arm lever B engages, said lever being pivoted in the supporting bracket of
the vertical arm b. The other end of the said lever B is pivoted to a rod f con-
necting up all the brake blocks on one side of each wheel, whilst an arm or
connecting rod c connects up the brake blocks on the opposite side of the wheels,
said latter arm or rod e being connected in turn to the rod by means of short
tumblers or pivoted levers c¹ c³, so that all the brake blocks will be simultaneously

page_text: drawn onto the wheels. The front end of the rod f is pivotally attached to the
arm o of an angle lever o, pivoted to the lower part of the machine frame, the
lower part of the said angle lever being provided with a suitable skid adapted
to engage advantageously with the foot of the rails, when the said brake is applied.
In the drawing (Fig. 3) the said skid is shewn as, engaging with the top of
the rails, but it is advantageously made to engage with the foot of the same as
aforesaid.
The operation of the said self acting brake takes place in the following
manner :-
As soon as the locomotive shews the slightest tendency to run off the line, as for
instance in passing curves, the front part of the same will be raised, i.e. the whole
body of the locomotive will turn on the pivot formed by the axle of the rear
wheels, this motion of the engine, will however, bring the skid a of the vertical
arm b in contact with the rail, whereby, the same will be pushed upwards, turning
the angle lever B on its pivot and braking all the wheels by means of the lever
system, c, c as described. Simultaneously however the front skid is, by the
action of the rod and lever arm o, pressed down onto the foot of the rail,
thus braking and at the same time tending to keep the engine between the
ails. Fig. 2 shews a side elevation of a carriage provided with a buffer
brake for use in connection with engines provided with the self acting brake
hereinbefore described. A push on the buffers suffices to put the brake on all
the wheels.
Having now particularly described and ascertained the nature of our inven-
tion and in what manner the same is performed we declare that what we
claim is :-
1. The combination with a locomotive of a vertically sliding spring pressed rod
mounted at the rear of the machine frame, and having its lower ends terminating
Just over and above the rails, and an angle lever pivotally 'connected to the frame
and adapted to engage with the said vertical moveable rod, and a lever system
actuated by said angle lever and operating the brake blocks in the manner and for
the purpose substantially as described.
2. The combination in a locomotive, of a vertically sliding spring pressed rod
mounted at the rear of the machine frame and having its lower end terminating
just over and above the rails, an angle lever pivoted to the said frame and
engaging with the said rod, a lever system to connect up the said angle lever
and the brake blocks, and a front skid pivotally mounted in the machine frame and
actuated by the said lever system in the manner and for the purpose substantially
as described.
3. The combination of a vertically sliding rod 6 mounted in the rear part of the
engine frame over and above the rail, a spring I to normally hold the same in its
lowest position, a slot in said rod, an angle lever B having its horizontal arm
engaging in said slot, connections f, c¹ and c from the brake block levers to the
free arm of said angle lever in the manner and for the purpose substantially as.
described.
4. The combination in a locomotive of a vertically sliding rod 6 mounted in the
rear part of the engine over and above the rails frame a spring I to normally hold
the same in its lowest position, a slot in said rod, an angle lever B having its
horizontal arm engaging in said slot, connections fe¹ and c from the brake block
levers to the free end of the said lever B, and a double arm lever o i¹ at the front
part of the engine, having its arm o pivotally attached to the end of the connecting
rod and provided with a suitable skid to engage with the foot of the rails
substantially as described.
5. In an engine, the combination of a vertically moveable spring, pressed
od b, mounted at the rear part of the engine and having its lower end located
just over and above the top of the rails, an angle lever B pivotally attached to the
engine frame in the vicinity of the said vertical rod, levers ƒ c and c¹ to connect up

page_text: the brake block levers and the said angle lever, and means for actuating the said
lever B from the vertical rod b substantially as described.
6. The combination of a vertically moveable spring pressed rod b mounted at the
rear of the engine, and having its lower end located just over and above the top of
the rail an angle lever B pivotally attached in the engine and having an arm pro-
jecting horizontally in the vicinity of the said vertically moveable arm b, a lever
system fc c' connecting up the brake block levers and the end of the said angle
lever B, a double lever o carrying a skid and pivotally attached to the fore part
of the rails just over or to the side of the rails, and having its upper end connected
to the end of the rod f and means for connecting the said angle lever B to the said
sliding rod b substantially as described.
Dated this 31st day of May 1894.
W. P. THOMPSON & BOULT,
Agents for the Applicants.