Improvements in Brakes for Vehicles.
Year: 1890

page_text: Date of Application, 12th May, 1890
Complete Specification Left, 10th Feb., 1891-Accepted, 14th Mar., 1891
PROVISIONAL SPECIFICATION.
Improvements in Brakes for Vehicles.
I, GILBERT VACHERAT, of Bourbon-l'Archambault (Allier), France, Farmer,
do hereby declare the nature of this invention to be as follows:-
My invention relates to improvements in brakes for vehicles.
The brake blocks of vehicles have never hitherto been so mounted as to ensure
their frictional surface being always concentric with the periphery of the wheel
to which they are applied, as even although the brake be accurately adjusted
when the vehicle is empty it no longer remains so when the vehicle is loaded
owing to the flexure of the springs and the sinking of the carriage body and
brake relatively to the wheel axle.
This invention has for its object to obviate the above objections by so mounting
the brake blocks that their frictional surface remains truly concentric to the rim,
of the wheel however much the vehicle may be loaded and however near it may
come down towards the axle.
Reference is to be had to the accompanying drawings, forming part of this
Specification, in which Figure 1 represents a rear, and Figure 2 a side, elevation of
a brake block mounted according to this invention.
Figures 3 to 8 shew details of the mode of mounting the brake block.
Figure 9 shews the tool employed for disconnecting the brake from its shaft.
Figure 10 shews a front elevation, Figure 11 a plan, and Figure 12 a side
elevation, of a cast iron brake block.
Figures 13 and 14 shew a modification of the same.
Figures 15 and 16 shew the tools employed for disconnecting the brake springs.
Referring to Figures 1 and 2, 6 is the brake block to which is fixed a lug or
ear a having an oblong slot normal to the friction surface upon which is mounted
the leaf or plate spring e slotted at its middle to pass over the lug a, as shewn, in
which position its ends bear against the back of the brake block holder and its
middle abuts against flats on the sleeves placed upon the spindle portion e of the
shaft d.
Figure 3 shews these parts separately, from which, in conjunction with Figures I
and 2, it will be seen that the spindle e passes through the slot of lng a which is
free to turn upon the spindle but is restrained by being clamped between the
sleeves which are slipped on the spindle e and tightened up to any necessary
degree by the nut y screwing on the threaded end of the spindle. It is against
the flats on these sleeves that the middle of the spring bears, and it will be
seen that by this means looseness of the block is prevented but the sleeves are free
to turn together with the block around the spindle in order that the block may.
accomodate itself to the wheel.
In Figures 1 and 2 the ear is attached to the brake block by a,bolt and nut, as
shewn in dotted lines, but, as shewn in Figures 4 to 8, the ear a may form part of,
or be attached to, a plate j forming a holder to which the brake block bis
removably attached, by means of a dovetailed connection between the part j¹ and
the groove i in the back of the brake block. In this case, only one loose sleeve is
employed, a long collar (Figure 8) being forged on the shaft and having a flat
upon it against which the spring bears.
To dismount the brake block, the cramp represented in Figure 9 is employed.
This cramp comprises two links, screw n, and cross-head a', the operation of these
parts being sufficiently evident from the drawing.
In Figures 10 to 14, the brake blocks are connected to the shaft by a pair of
ears a¹ having oblong slots e' through which the spindle passes, the two ears

page_text: (Figures 10 to 12) being connected together by a sort of bridge piece c¹ beneath
which is passed the spring d having a depression 4 at its middle to give passage to
the spindle which bears against the spring and retains it in position and compresses
it against the back of the brake block. The parts a' care cast in one with the
back whose ends are bevelled, as shewn, to act as a plough to throw the mud
aside and prevent it falling upon the brake mechanism.
In Figures 13 and 14, a tubular distance piece is inserted between the lugs a¹
in lieu of the bridge piece c¹ before referred to, the whole being secured as before
by means of a nut bearing either directly upon the outer lug or upon a washer j¹ on
the spindle.
To dismount the spring, the cramp & (Figure. 15) is passed over one end of the
spring so as to embrace both it and the brake block, and pressure is applied by
means of screw which is turned by spanner me (Figure 16) which has a square
hole n' fitting on the end of the screw, after which the nut g' can be unscrewed.
Dated this 12th day of May 1890.
G. VACHERAT.
By A. M. & Wm. Clark,
53, Chancery Lane, London, Patent Agents.
COMPLETE SPECIFICATION.
Improvements in Brakes for Vehicles.
1, GILBERT VACHERAT, of Bourbon l'Archambault (Allier), France, Farmer,
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 :-
My invention relates to improvements in brakes for vehicles.
The brake blocks of vehicles have never hitherto been so mounted as to ensure
their frictional surface being always concentric with the periphery of the wheel to
which they are applied, since even although the brake be accurately adjusted when
the vehicle is empty it no longer remains so when the vehicle loaded owing to
the flexure of the carrying springs and the sinking of the carriage body and brake
relatively to the wheel axle.
This invention has for its object to obviate the above objections by so mounting
the brake blocks that their frictional surface remains truly concentric to the rim of
the wheel under all conditions of load, and however near the vehicle body may come
down towards the axle.
Reference is to be had to the drawings left with my Provisional Specification and
also to the accompanying drawings, forming part of this Specification, in which
Figure represents a rear, and Figure 2 a side, elevation of a brake block mounted
according to this invention.
Figures 3 to 8 shew details of the brake blocks and holder and the mode of
mounting the same.
Figure 9 shews the tool employed for disconnecting the brake from its shaft.
Figure 10 shews a front elevation, Figure 11 a plan, and Figure 12 a side
elevation, of a cast-iron brake block.
Figures 13 and 14 shew elevations of a modification of the same.
Figures 15 and 16 shew the tools employed for disconnecting the brake springs.
Referring to Figures 1 and 2, is the brake block to which is fixed a lug or
ear a having an oblong slot normal to the friction surface upon which is mounted
the leaf or plate spring c slotted at its middle to pass over the lug a, as shewn, in
which position its ends bear against the back of the brake block holder and its
middle abuts against flats on the sleeves ff placed upon the spindle portion e of the
shaft d.
Figure 3 shews these parts separately, from which, in conjunction with Figures 1
and 2, it will be seen that the spindle e nasses through the slot of lug a which is

page_text: free to turn upon the spindle but is restrained by being clamped between the
sleeves ff, which are slipped on the spindle e and tightened up to any necessary
degree by the nut g screwing on the threaded end h of the spindle. It is against
the flats on the sleeves ff that the middle of the spring bears, and it will be
seen that by this means looseness of the block is prevented, but the sleeves are
free to turn together with the block upon the spindle in order that the block
may accommodate itself to the wheel.
In Figures 1 and 2 the ear is attached to the brake block by a bolt and nut, as
shewn in dotted lines in Figure 2, but, as shewn in Figures 4 to 8, the ear a may
form part of, or be attached to, a plate j forming a holder to which the brake
block is removably attached, by means of a dovetailed connection between the
In this case, only one
part and the groove i in the back of the brake block.
loose sleeve k is employed a long collar (Figure 8) being forged on the shaft and
having a flat upon it against which the spring bears.
To dismount the brake block, the cramp represented in Figure 9 is employed.
This cramp comprises two links m m, screw n, and cross-head n¹, the operation of
these parts being sufficiently evident from the drawing.
In Figures 10 to 14, the brake blocks are connected to the shaft by a pair of
ears a having oblong slots & through which the spindle passes, the two ears
(Figures 10 to 12) being connected together by a sort of bridge piece c¹ beneath
which is passed the spring d' having a depression 41 at its middle, to give passage
to the spindle which bears against the spring and retains it in position and com-
presses it against the back of the brake block. The parts a' c¹ are cast in one with
the block whose ends are, bevelled, as shewn, to act as a plough to throw the
mud aside and prevent it falling upon the brake mechanism.
In Figures 13 and 14 a tubular distance piece is inserted between the lugs a¹
in lieu of the bridge piece c¹ before referred to, the whole being secured as before
by means of a nut g¹ bearing either directly upon the outer lug, or upon a washer j¹
on the spindle.
To dismount the spring, the cramp (Figure 15) is passed over one end of the
spring so as to embrace both it and the brake block, and pressure is applied by
means of screw which is turned by spanner m (Figure 16) which has a square
hole ' fitting on the end of the screw, after which the nut g' can be unscrewed.
Figures 17, 18, and 19, represent, in elevation and vertical section, a brake of
this kind adapted for light two-wheeled vehicles. The spring 1 bears against a
flat 2 on the joint pin 3 connecting the brake block 4 to a strap 5 bolted to the
brake lever or bar, the brake being free to pivot on the spindle as before.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
The improvement in brakes for vehicles, which consists in pivoting the brake
block upon a horizontal axis in combination with a spring so applied as to hold
the brake block in position whilst permitting it to accommodate itself to the
wheel, whereby the frictional surface always remains concentric with the periphery
of the wheel notwithstanding flexure of the carrying springs, as hereinbefore
described and represented in the drawings.
Date
L
1001
G. VACHERAT.
By A. M. & Wm. Clark,
53, Chancery Lane, London, Patent Agents.
G. VACHERAT.
By A. M. & Wm. Clark,
53, Chancery Lane, London, Patent Agents.