Improved Compound for Brake Blocks.
Year: 1898

page_text: Improved Compound for Brake Blocks.
We, HAROLD MILLS CLIFFORD, of 31, Charleville Road, West Kensington, W.,
Captain 4th Scottish Rifles (Cameronians), and WILLIAM FREDERICK LOWNDES
FRITH, of 21, St. Mary Axe, London, E.C., Accountant, do hereby declare the nature
of this invention to be as follows:-
This invention has for its object to render the compounds for paving and flooring
described in the Specifications to Patents No. 9436 of 1886 and 8460 of 1892 and
consisting of a mixture of cork with bituminous material, applicable for. brake
blocks.
..
For this purpose we mix with the said ingredients cocoanut fibre whereby the
compound is rendered harder and more durable, and better able to withstand the
friction and heat to which brake blocks are subjected, while at the same time
the frictional action obtained by such mixture of cork, bitumen and cocoanut fibre
is more effective than that of wood and other materials that have hitherto been
used for brake blocks.
We have found that an admixture of about 25 per cent. of cocoa nut fibre to the
said cork and bitumen compounds gives good results; the proportions may however
be varied considerably..
... 171 1
AL 1000
.
ABEL & IMRAY,
Agents for the Applicants.
We, HAROLD MILLS CLIFFORD, of 31, Charleville Road, West Kensington, W.,
Captain 4th Scottish Rifles (Cameronians), and WILLIAM FREDERICK LOWNDES
FRITH, of 21 St. Mary Axe, London, E.C., Accountant, 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 has for its object to render the compounds for paving and flooring
described in the Specifications to Patents Nos. 9436 of 1886 and 8460 of 1892 and
consisting of a mixture of cork with bituminous material applicable for brake blocks.
For this purpose we mix with the said ingredients cocoanut fibre whereby the com-
pound is rendered harder and more durable, and better able to withstand the friction
and heat to which brake blocks are subjected, while at the same time the frictional
action obtained by such mixture of cork, bitumen and cocoanut fibre is more

page_text: effective than that of wood and other materials that have hitherto been used for
brake blocks.
The proportions in which the said: substances are mixed together may be varied;
we have found the following to give very good results:
》་
-Bituman
3
70 mox cont
100
The ingredients are thoroughly incorporated under sufficient heating for
maintaining the bitumen in a pasty condition, after which the compound while
plastic is placed into moulds and subjected to considerable pressure such for
instance as about 700 lbs. to the square inch, the mass being maintained under
compression until it has become sufficiently rigid to maintain its compressed
form.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
A compound for brake blocks consisting of a mixturo of bituminous material
finely divided cork and cocoanut fibre, the said ingredients being incorporated
under heating and then subjected to pressure in moulds, substantially as
described.