Improvements in and connected with Wheel-brakes for Vehicles.
Year: 1895

page_text: PROVISIONAL SPECIFICATION.
Improvements in and connected with Wheel-brakes for Vehicles.
I, JOHN GEORGE AULSEBROOK KITCHEN of 28 Rose Grove Ardwick,
Manchester in the County of Lancaster, Mechanician, do hereby declare the nature
of this invention to be as follows:-
This invention relates more particularly to brakes for common road vehicles in
which each pair of brake blocks are carried by a rocking shaft or roll bar and
the principal object of this invention is to make the rocking shaft readily
adjustable to the width of the body or frame of the vehicle or to the gauge of
the wheels, also to enable angular adjustment of the blocks or shoes relatively
to the wheels to be readily made.
By this invention also solid bearing blocks may be easily applied and longitudinal
adjustment of the shaft readily obtained.
It is usual to form the rocking shaft in one piece with an arm at each end, the
end of each arm carrying the brake-block or the brake-shoe. In the centre or
thereabouts of the shaft is formed another arm to the end of which is connected
the brake rod in ordinary cases.
According to my invention I make the rocking shaft in two or more pieces formed
to telescope one into the other. The several parts are fixed together preferably
by means of set screws, but the fixing may be effected by screw clips or by screw
couplings.
I prefer, however, to form and employ a sleeve fitted at each end say with set
screws, into which sleeve the ends of the two extreme parts of the shaft are passed
and secured respectively to the sleeve by the set screws aforesaid.
Upon the sleeve is formed the arm through which the shaft is rocked, in some
cases by means of the brake rod, and in other cases by means of the moveable
part of a distensible chamber when pneumatic or other fluid pressure is applied to
the brake.
The bearing-blocks upon which the shaft rocks may be slid upon the extreme
parts of the shaft before such parts are coupled together and in order to prevent
longitudinal movement of the shaft, collars fitted with set screws, or clips may
be passed on to the parts of the shaft and secured thereto against the bearing
blocks.
DL
2011 1
AT
1
1005

page_text: COMPLETE SPECIFICATION.
Improvements in and connected with Wheel-brakes for Vehicles.
I JOHN GEORGE AULSEBROOK KITCHEN of 28 Rose Grove, Ardwick,
Manchester in the County of Lancaster, Mechanician, 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 :-
This invention relates more particularly to brakes for common road vehicles in
which each pair of brake blocks is carried by levers formed on or fixed to a
rocking shaft or roll bar and the principal object of this invention is to make the
rocking shaft readily adjustable to the width of the body or frame of the vehicle
or to the gauge of the wheels, also to enable the angular adjustment of the blocks
or shoes relatively to the wheels or the operating lever on the shaft to be readily
made.
The invention consists in the improved construction or arrangement of the
rocking shaft or roll bar for this purpose, in consequence of which also solid
bearing blocks may be used for carrying the shaft and the longitudinal adjustment
of the shaft be readily effected.
On the sheet of drawings appended hereunto Figs. 1 and 2 show the improved
construction or arrangement of the rocking shaft in front elevation partly in section
and in end view respectively.
Figs. 3 and 4 show a modification of the same.
It has been usual to form the rocking shaft in one piece with an arm or lever
at each end carrying a brake block or shoe. In the centre or thereabout of the
shaft another lever or arm is forged thereto, the end of which is connected to the
brake rod or chain in ordinary cases. With this construction a special shaft has
to be forged for each gauge of wheels or kind of carriage, and the angle of the
brake carriers and central arm cannot be varied except by reforging the shaft.
The brackets or blocks carrying the shaft have to be fitted with caps screwed to
the blocks, which may shake loose.
these inconveniences, so as to make the same shaft applicable to various gauges of
The purpose of my invention is to remedy
wheels and angles of the arms or levers.
According to my invention I make the rocking shaft in two or more pieces,
formed to telescope one into the other or slide on each other. The several parts
are fixed together by means of screws or clips or screw couplings.
I prefer however to employ a sleeve a as shewn on the drawings into which the
ends of the two extreme parts b and c of the shaft are passed and secured to the
sleeve. This may be done by set screws d as shewn on Fig. 1 screwed into tapped
bosses a¹ on the sleeve a or by forming the sleeve with a longitudinal slit and
lugs a as shewn on Figs. 3 and 4, through which lugs bolts are passed with nuts
for drawing them together and causing the sleeve to clip, the ends of the parts b
and c of the shaft or equivalent means of locking the parts together may be
adopted. The sleeve is formed or has attached to it an arm or levere through
which the compound shaft is rocked, in some cases by means of a brake rod or
chain operated in the usual way by the foot or hand, in other cases by means of
the moveable part of a distensible chamber when pneumatic or other fluid pressure
is used for actuating the brake.
The bearing blocks ƒ and g in which the parts b and c of the compound shaft
rock, can be slid upon them before these parts are coupled together and in order
to prevent longitudinal movement of the shaft, collars h fitted with set screws as
shewn on the drawings, or clips or their equivalents may be passed on to the parts b
and of the rocking shaft and secured thereto against the bearing blocks f and
The parts b and c are bent at their ends so as to form arms 6' and c' to which the
brake blocks are fixed.

page_text: With the arrangement of rocking shaft as hereinbefore described, the distance
between the arms b' and c' can be readily adjusted to the gauge of the wheels, and
the arme can be set at any angle to the arms c and d to suit the particular
arrangement of the mechanism for actuating the brake and to take up the wear of
the brake blocks i.
In some cases the sleeve a or its equivalent may be formed solid with one of
the parts borc and the other part connected to it by any of the means herein-
before described, but preferably the shaft is made in three parts.
Having new particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that
what I claim is :
1. The construction of the rocking shafts for vebicle brakes in two or more parts
longitudinally adjustable relatively to each other, substantially as hereinbefore
described and for the purpose set forth.
2. The construction of the rocking shafts for vehicle brakes in three parts
longitudinally and angularly adjustable relatively to each other, substantially as
hereinbefore described and illustrated by the drawings.
3. In a rocking shaft for vehicle brakes the combination of a central sleeve
having the brake lever formed on it and two outer parts telescopically inserted into
the same and fixed thereto substantially as herein before described and illustrated
by the drawings.
4. The construction of the rocking shafts for vehicle brakes substantially as
bereinbefore described with reference to Figs. 1 and 2, and Figs 3 and 4,
respectively.
R. J. URQUHART,
57, Barton Arcade, Manchester, and 5, Clayton Square, Liverpool,
Consulting Engineer and Patent Agent.