An Improvement in the Manufacture of Bricks for Fixing Purposes.
Year: 1897

page_text: This Print is in accordance with the Original Specification as it stands after
Amendment (under Section 11 of the Patents, &c. Act, 1883) as required by
the decision of the Chief Examiner of the 30th day of June 1898.
PROVISIONAL SPECIFICATION.
An Improvement in the Manufacture of Bricks for Fixing Purposes.
I, WILLIAM GEORGE JARVIS, of Clare, Suffolk, Builder and Brickmaker., do
hereby declare the nature of this invention to be as follows:-
My invention relates to an improvement in the manufacture of bricks for
facilitating the driving of nails and screws used for fixing wood and other work
generally to walls in the construction or decoration of buildings, the object being
to render unnecessary the plugging of the wall or the use of wood bricks as
customary for fixing purposes.
The improved brick is equal in appearance and colour to a red or white facing
brick and may be used as such for interior work but its texture is so far different
from that of an ordinary brick that wrought or cut nails and screws may be
driven in without liability of splitting the brick and when so driven in will obtain
as firm a hold as though driven into wood.
This result is accomplished by making the brick of a composition of ordinary
brick earth and wood sawdust, these ingredients being intimately mixed in the
pug mill, moulded, dried, and burnt in the same way as an ordinary kiln-burned
brick.
The advantages of these bricks over plugging or wood bricks is that it affords
a good hold for the mortar or plaster and that it is not liable to decay or to
expansion and contraction by moisture and heat and is therefore not liable to work
loose in course of time as in the case of wood plugs and wood bricks.
Dated this 19th day of October 1897.
An Improvement in the Manufacture of Bricks for Fixing rurposes.
do
I, WILLIAM GEORGE JARVIS of Clare, Suffolk, Builder and Brickmaker,
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:-
Intos to an improvement in the manufacture of bricks more

page_text: particularly intended for use as substitutes for wood plugs or wood bricks com-
monly employed to enable nails and screws to be driven therein for fixing
woodwork, mouldings, cornices, weathering tiles, and other work generally, to
walls in the construction or decoration of buildings.
The improved brick is equal in appearance and colour to a red or white facing
brick, and may be used as such for interior work, but its texture is
so far different from that of an ordinary brick that wrought or cut nails
or screws may be driven into it without liability of splitting the brick and without
injury to the nail or screw and when so driven in will obtain as firm a hold as
though driven into wood.
This result is accomplished by making the brick of a composition consisting
essentially of ordinary clay or brick earth and wood sawdust to which is
added a small proportion of cinder ash or coal dust for the purpose of hardening
the brick, these ingredients being intimately mixed in the pug mill, moulded by
hand or machine, dried (but not necessarily quite so much as an ordinary brick)
and finally burnt in the same way, and at about the same heat, as an ordinary
kiln-burned brick.
"The preferred proportions of the ingredients of which the brick is composed are
as follows:
:-
Clay or Brick Earth
Sawdust
-
Cinder Ash or
Coal Dust
}
parts by bulk.
2
"
"
1 part
"3
"
وو
The advantages of these bricks over plugging or wood bricks are that they afford
a good hold for the mortar or plaster and that they are not liable to decay nor to
expand and contract by moisture and heat, and are therefore not liable to work
loose in course of time as in the case of wood plugs and wood bricks. Moreover
they are not inflammable as are ordinary wood bricks or plugs.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I wish it to be under-
stood that I am aware of Allison's Specification No. 15579 of 1886 and that I do
not claim anything described and claimed therein, but I declare that what
I claim is: :-
The manufacture of bricks for fixing purposes, of a mixture consisting essentially
of clay or brick earth and of sawdust with the addition of cinder ash or coal dust
substantially as specified.
A. M. & WM. CLARK,
Chartered Patent Agents, 53, Chancery Lane, London.