Improvements in Bogie Cars.
Year: 1895

page_text: Improvements in Bogie Cars.
I, ALFRED BARNES PICKARD of 5 Madeira Road Streatham London S.W.
Civil Engineer, do hereby declare the nature of this invention to be as follows:-
My invention relates to cars such as are used on the well known switchback
railways where the track is constructed with descending and ascending grades, and
'herefore requires a bogie moveable in the vertical plane. In addition I provide a
movement in the horizontal plane for the purpose of turning quick curves, so as to
provide in a comparatively narrow space a return curve to avoid changing cars as
is now usual.
My invention might be applied to any rolling stock intended to be used on sharp
*urves or over uneven ground.
To accomplish the above I make an attachment between the bogie-frame & the
body of the car by means of a ball or universal joint, leaving a convenient space
between them. Parallel with the axes of the wheels of the bogie and in a line
with the centre of the ball joint, I fix on the edges of the body of the car by means
of small brackets two wheels or rollers. These press on radial plates fixed on the
bogie frame in such a manner that they will always run on the plates however
sharp the curve they have to travel over. The radial plates may be supported on
blocks of india-rubber or springs in guides to make the running more even & allow
for variations in the line. I might instead use a plate spring alone allowing the
car to slide over the middle of the spring in suitable guides on the body of
the car.
The action is as follows; The universal or ball joint allows freedom of move-
ment in all directions however to keep the car level the side rollers or springs are
provided and these do not interfere with the movement in the vertical plane being
on the same axis as the ball joint. In turning a curve the car body and bogie
turn at an angle to each other round the ball or universal joint, the rollers
supporting the car and running round the radial pieces on the bogie frame.
I might arrange a bogie to make the connection between two cars by means of
two ball joints fitted to one bogie, inaking the cars of suitable length taking into
consideration the curves, the ends of contiguous cars resting one in each ball
joint.
Dated this Seventh day of August 1895
A. B. PICKARD,
Applicant.
Improvements in Doge Carb
I, ALFRED BARNES PICKARD of 5 Madeira Road Streatham London S.W.
Civil Engineer 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 :-
In order to make a car connected with a bogie in such a manner that the car can
travel equally well round curves and on a track or line constructed with ascending
PQ77

page_text: and descending gradients my method of construction will be clearly seen on
reference to the accompanying drawing.
Fig. 1. is a cross section through the centre of the bogie. Fig. 2 a longitudinal
section and Fig. 3. a plan with the car removed.
On reference to the drawing A is the framework of the bogie in this case shewn
in channel iron, A, A₁ are the wheels. Across the framework A 1 place two
supporting pieces B B carrying and rigidly fixed to same a metal piece B₁. In
this is inserted a coned piece C on the end of which is a ball C₁. A metal piece D
fixed to the frame of the car or carriage E and cover D, complete a ball joint.
To prevent the car going over sideways I place two rollers E₁, one on each side
of the ball joint. These run on two radial plates E, which are fixed to the bogie
frame A.
The action on turning a curve either in a vertical or horizontal plane will be
readily seen on reference to the drawing.
By placing two ball joints on the bogie frame A I could use the bogie so
arranged as a coupling between two cars.
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. In connection with a bogie frame, a ball joint and rollers substantially for
the purposes described.
2. In connection with a bogie frame a pair of ball joints and rollers forming a
coupling between two cars substantially as described.
Dated this Fifth day of May 1896.
A. B. PICKARD,
Applicant.