Improvements in Brake Blocks for Carriage Wheels and like use.
Year: 1893

page_text: Date of Application, 15th Feb., 1893
Complete Specification Left, 15th Nov., 1893-Accepted, 16th Dec., 1893
PROVISIONAL SPECIFICATION.
Improvements in Brake Blocks for Carriage Wheels and like use.
We, AUGUSTE LOUSTALOT, Saddler, of 11 Passage Taylor, Pau, France, and
RÉMY CAZENAVE, Landowner, of 26 Avenue Porteneuve, Pau, France, do hereby
declare the nature of this invention to be as follows:-
:-
This invention consists in improvements in brake blocks for carriage wheels, and
like use, having for their object the production of a brake block, which is perfectly
noiseless, causes no vibration to the vehicle when applied, does not wear the tire or
paint of the wheels, maintains equal pressure until entirely worn out, whilst
possessing greater durability and higher holding or braking power than those
hitherto in use.
These improvements consist in building the brake block of either
(a) plaited jute, which has been treated with a mixture of tar and pitch: or
(b) of this same treated jute, having its sides protected by a covering of leather
treated so as to be impervious to wet.
These blocks may be fastened on to a backing of wood, or metal by short screws,
or in any other convenient method, this backing being provided with bolts or a dove
tail, so as to be readily applied to the mechanism of any brake now in use.
Dated this Fifteenth day of February 1893.
JAMES ANGLIM.
COMPLETE
SPECIFICATION.
Improvements in Brake Blocks for Carriage Wheels and like use.
We, AUGUSTE LOUSTALOT of 11 Passage Taylor, Pau, France, Saddler and
RÉMY CAZENAVE of 26 Avenue Porteneuve, Pau, France, Landowner, 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 consists of improvements in brake blocks for carriage wheels and
the like use and its object is the production of a brake block which is perfectly
noiseless, causes no vibration to the vehicle when applied; does not wear the tyre
or paint of the wheels; and maintains equal pressure until entirely worn out, whilst
possessing greater durability and higher holding or braking power than brake blocks
now in use.
According to our invention we build or construct brake blocks of plaited jute
which has been treated with tar or pitch or a mixture of tar and pitch, or of this
same jute with its sides protected by a covering of leather which has been treated
in any known manner so as to be impervious to wet.
These blocks may be fastened to a backing of wood or metal by short screws or
in any other convenient manner, this backing being provided with bolts or a dove-
tail or other means whereby it can be readily fitted to the brake mechanism.
The accompanying drawings represent several brake blocks constructed in
accordance with our invention.
Figure 1 is a side view with the brake attachment in section illustrating one
construction specially adapted for omnibuses and other heavy vehicles.

page_text: Figures 2 and 3 are respectively a back view and a cross section on the line 1-1
of Figure 1 of the same brake block.
A is the block proper; it is composed of plaited jute which has been treated
with a mixture of tar and pitch; this plaited jute is built up or coiled into a block
of the required dimensions, then immersed for about 8 or 10 minutes in a mixture
of boiling tar and pitch so that it may become well saturated therewith, and after
removal from the mixture, it is preferably submitted to pressure. The block is
then connected to a backing of wood or metal B, the connection being preferably
effected by means of screws a a as shown. The screws should be made as short
as practicable in order that the jute may be worn considerably down before
exposing their ends. The backing B is made narrower at one end than the other
and dovetails into a corresponding groove in the brake attachment C, so that the
application of the brake to a wheel tends to connect the brake block more firmly
to the brake attachment. The brake attachment C is shown as provided with
screw bolts and nuts bb to enable it to be connected to the brake lever.
When a
block has become worn out it can be removed by simply sliding it and its backing B
out of the groove in the attachment C, and a new block can as readily be slid into
the groove.
Figures 4, 5 and 6 represent a similar brake block to that shown in Figures 1, 2
and 3 but made shorter in proportion to its thickness so as to adapt it to a lighter
class of vehicle; and instead of the attachment C having screw bolts and nuts to
enable it to be attached to the lever it has a transverse aperture P to receive a rod
or crank on the end of the brake lever when this is at ono side of the wheel instead
of in line with it.
Figure 6 is a cross section on the line 2-2 of Figure 4.
Figures 7 and 8 represent respectively in side and face view a brake block formed
of plaited and tarred jute A as hereinbefore described but with the sides of the
jute enclosed by a covering of leather H which can be secured to the jute block
either by stitching as seen at d d or otherwise. The block A will be fitted with a
backing such as B, Figures 1 to 6, to enable it to be fastened to a brake attachment
such as C.
Figures 9, 10 and 11 represent another of our plaited and tarred jute blocks
protected by a leather covering H but in this case instead of the leather being
made to cover only the sides of the block as in Figures 7 and 8 it is made to cover
the sides and the back, being in the form of a cup into which the jute block A is
forced, the block and the leather being then secured together by a transverse
rivet e. B is a backing to enable the block to be fastened to a brake attachment;
the backing is shown as composed of a body of wood and a back plate of metal.
A piece of wood may also be placed at the bottom of the leather cup between it
and the inner face of the jute for the purpose of giving a better hold to screws
inserted at the back. This construction of brake block is suitable for lighter
vehicles such as victorias and other private carriages, it being more compact and
more in keeping with such vehicles than the other blocks which we have shown in
the drawings.
Although we have hereinbefore spoken only of jute as the fibre that we
employ in the construction of our brake blocks it is evident that other plaited fibres
treated with tar and pitch, such for example as hemp and flax will answer the
purpose. Jute, however, is much to be preferred because it is cheaper.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
1. A brake block constructed substantially as hereinbefore described of plaited
jute or other fibre treated with tar and pitch or with tar or pitch.
2. A brake block constructed substantially as herein before described of plaited
jute or other fibre treated with tar or pitch or with tar or pitch and of a leather
covering to the sides, or to the sides and back, of the fibre.

page_text: 3. The several brake blocks hereinbefore described with reference to the
accompanying drawings.
Dated this 15th day of November 1893.
J. C. MEWBURN,
55 & 56, Chancery Lane, London, Chartered Patent Agent.