An Eccentric Spring Braking Apparatus for Road and Rail Vehicles.
Year: 1894

page_text: Date of Application, 6th Oct., 1894
Complete Specification Left, 21st May, 1895-Accepted, 3rd Aug, 1895
PROVISIONAL SPECIFICATION.
An Eccentric Spring Braking Apparatus for Road and Rail
Vehicles.
I JOSEPH JACKMAN 13 Horton Green Bradford Yorkshire Coach Smith and
Spring Maker 1 do hereby declare the nature of this invention to be as follows.-
An improvement in apparatus for biaking vehicles
By mounting an eccentric with a catch in the centre, between two collars fixed
to an axle, and anauging a pin to work through one of the collars, and coming
in contact with the catch in the eccentric, causing the extended ends of the
eccentric to come in contact with two spings, fixed in the bush on cylinder
thereby causing the biake above inentioned.
To explain more in detail the above statement I furnish the following particulars
In order to explain my invention.
Imount on the wheel end of an axle, two collars the one farthest from the
axle end, I forge fast to the intended axle
The second one is a loose one tapped and made to screw ou to the axle nearest
the end a space is loft between the two collars in which an eccentric revolves
The eccentric I make hollow in the centre having a catch projecting towards the
centre.
On the sides of the eccentric, I make two flanges large enough to fit and iun
on the inside halves of the two collars.
I bore a hole though the solid collar parallel with the axle, in order that a steel
pm mude sufficiently strong, that when pushed forward, it will hold and stop the
eccentric from revolving round the collais, as the pin when pressed forward
through the solid collar, comes in contact with the catch in the centre of the
eccentiic
I make the bush for the axle, in two parts the forepart being made to go
though the nave of the wheel, with a flange to fit the back part of the nave
Screws or bolts go through the flange parallel with the nave.
In the centre of the flange, I leave a recess, in which half of the collar nearest
the end of the axle uns.
The back part of the bush 18 made to sciew on to the flange of the front
part of the bush.
I make a groove on the outside of the bush of the back portion, and a micbe
in the flange of the forepart of the bush, for a glut or key which, I fasten with
R SCICW This prevents the two halves from moving.
The inside walls of the back part of the bush is made wide enough for the
eccentric to run in.
On the inside walls of this part of bush, I fix two springs, which press towards
the centre, so that when the steel pin afore mentioned, is pressed through the
solid collai, to the hollow space between the two collars, it comes in contact
with the catch in the eccentric, and stops it from revolving with the wheel, thus
causing the two extended ends of the eccentric, to press against the springs
These springs they have to force back against the walls of the bush before they
can revolve with the wheel.
In the inside flange I make a recess in which the outside balf of the solid
collar runs

page_text: Outside of the bush next to the solid collar I make a receptacle, for the pin and
spiral spring to work in.
The spiral sping pressing against the collar of the steel pin forces the piu
through the solid collar of the axle
This portion of the pin and, spiral spring I fit into the afore mentioned
receptacle, away from the solid collar of the axle.
To the projecting end of the steel pin I fix a strap or rod, which I carry forward
to the forepart of the carriage, connected with a lever, within easy reach of the
driver.
When the lever is pressed or pulled the steel pin is forced into the receptacle,
and, the brake is off, when released the brake is on.
The afore mentioned arrangement is the same for cycles, railway, and, tram cars,
with the following exception.
Owing to the axles of the above class of vehicles, evolving with the wheel
I mount on the axle a stationary step seemed by n stay, or lever, made laige
enough in the bore, for the axle to revolve with the wheel.
The eccentric, and steel pin, I fit to the stationary step
I then mount two collars on the axle for the step to work between.
Outside of the collars, I fix a round cylinder, made in two parts chased with a
screw thread, so that one part will screw into the other, secured by a glut or key
as in afore mentioned arrangements
•
Inside of the cylinder I fix the springs to stop the eccentric as in receptacle
afore mentioned.
The cylinder 1 key or screw fast to the axle.
JOSEPH JACKMAN,
13 Hotton Green, Bradford, Yorkshire,
Coach Smith' and Spring Maker.
An Eccentric Spring Braking Apparatus for Road and Rail
Vehicles.
f
JOSEPH JACKMAN 13 Horton Green Bradford Yorks Spring Maker and Coach
Smith' 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 :-
That I create a brake by means of an eccentric, which has a catch in the centre
and a sping to grip its outer run to the inside of the bush or cylinder to which it
is attached The revolving of the eccentric is stopped by a pin, which is pushed
by the spiral spring, coming in contact with the catch and causing the eccentric to
force back the spring that gups it against the side of the' bush.
In order that my invention may be more fully understood, 1 will further describe
the same by making reference to the accompanying sheet of diawings.
Fig. 1 represents a plan view of a drawing of a railway, or tram cat axle, with
my invention attached, cut through the centre longitudinally
To the axle AI mount a stationary step III To the top part of the step
I fix a steel pin E the piu as shown in the plan is pressed forward by the spal
sping F, which causes the pin to come in contact with the catch J, and stops the
eccentric CC, from revolving with the axle A.
Before the eccentric CO, can revolve with the axle A it has to force back the
spring DD, against the walls of the cylinder B B B B.
When the pin E is drawn into the receptacle clear of the catch J, the binke
18 off.

page_text: The right end of the cylinder B B B B, I secure to the axle A, the lelt end part
of the cylinder B B B BI secure to the right end part by screwing one into the
other 1 I.
Fig. 2 18 an interior view of the eccentric, showing the catch J, and the extended
ends of the eccentric C C.
Fig. 3 represents a plan view of a road vehicle axle with my invention attached.
A A A A, represents the axle and, collars.
I mount on the collars of the axle A A A A an eccentric C, spring D, steel
pin E and spiral spring F as described in Fig. 1.
The right end portion of the bush B 1 secure to the left end portion by screwing
oue into the othei 2.
The oil cup end of the bush I secure to the nave of the wheel by the flango H.
The bush B being made fast to the nave evolves with the wheel.
Fig. 4 is an interior view of the cylinder B, spring D, eccentric C, axle A,
catch J
Fig. 5 represents the outside of the bush broken off at the wheel end.
To the afore-mentioned steel pin I fix a strap, or rod, which I carry forward to
the forepart of the carriage, connected with a lever within easy reach of the driver.
When the level is pulled the steel pin is forced into the receptacle and the brake
is off, when released the brake is on.
Пaving now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed 1 declare that what I
claim is
1. By the joint action of an eccentric and spring to grip the same and of a
pin worked by means of a spiral spring that I am able to brake any road or rail
vehicle.
2. That the bush of a road vehicle axle is made in three parts which screw
into one another and are fastened to the nave by means of flanges.
3. That in the case of a revolving axle the above is attached to a stationary
step, which is fitted into a cylinder, which revolves with the axle, and which
consists of three parts screwing into each other.
Dated the 20th of June 1895.
JOSEPH JACKMAN.