Improvements in Moulds for Pressing Bricks, Blocks, Slabs, and the like.
Year: 1889

page_text: Date of Application, 20th Mar., 1889
Complete Specification Left. 14th Jan., 1890-Accepted, 20th Mar.,
1890
PROVISIONAL SPECIFICATION.
Improvements in Moulds for Pressing Bricks, Blocks, Slabs, and
the like.
I JOHN GEORGE PARKER of 17 Southampton Street, Bloomsbury, London, W.C.
Engineer, do hereby declare the nature of this invention to be as follows :-
My invention is carried out as follows:-
In place of making moulds, to be acted upon by pressure for making bricks, blocks,
slabs and the like, with solid sides and a solid bottom, I make such moulds with the sides
and ends perforated in their lower portions and with perforated loose or fixed bottoms.
I dispose inside such moulds a body of grit, sand, gravel or any suitable granulated
substance or compound, contained in bags or otherwise; the same filling the mould
to a conveniently higher level than that to which the perforations extend. I then
provide a perforated or porous plate, the internal size of the mould, which is made
to rest upon the granulated mass inside and at the bottom of the mould. I spread
upon the top surface of this loose perforated plate a piece of fine calico or other
suitable textile material which will check the passage of solid matters through it.
Having thus prepared my moulds, it will be understood that the object of the
perforations and body of granulated material is to provide a vehicle for the passage
of water or moisture when pressure is brought to bear upon the upper contents of
the mould.
In making bricks, blocks, slabs and the like the moulds as just described aro
filled with "slip," clay, semi-dry material, or prepared compounds such as are usually
employed in the making of artificial stone, and by means of a die or plunger actuated
by hydraulic or other force, the mass contained in the mould is gradually compressed, and
simultaneously the water or moisture is driven through the interstices of the granulated
material and the perforations of the mould, until the solid matters, only are retained
in the mould and which are then firmly and compactly consolidated; after which the
brick, block or slab is removed from the mould in the usual manner.
In some cases I may dispense with the perforations, as herein before described,
in the lower portions of the sides and ends of my moulds, and retain only those
in the bottom of the moulds, when the latter furnish a sufficient means for the passage
of water or moisture from the materials under treatment.
Dated this Twentieth day of March 1889.
COMPLETE SPECIFICATION.
Improve its in Moulds for Pressing Bricks, Blocks, Slabs, and
the like.
103
I, JOHN GORGE PARKER, of 17 Southampton Street, Bloomsbury, London, Civil
Engineer, dognereby declare the nature of this invention and in what manner the same
is to be pei brmed, to he particularly described and ascertained in and by the
following statement :—
My invention is carried out as follows:-
In place of making moulds to be acted upon by pressure, for making bricks, blocks,
slabs and the like, with solid sides and a solid bottom, I make such moulds with the
sides and ends perforated in their lower portions and with perforated loose or fixed
bottoms. I dispose inside such moulds a body of grit, sand, gravel, or any suitable
granulated substance or compound, contained in bags or otherwise, the same filling
the moulds to a conveniently higher level than that to which the perforations extend.
I then provide a perforated or porous plate, the internal size of the moulds, which is