Improvements in Material for use as a Damp Course in Building Foundations.
Year: 1891

page_text: Date of Application, 17th Dec., 1891
Complete Specification Left, 19th Sept., 1892-Accepted, 29th Oct., 1892
PROVISIONAL SPECIFICATION.
Improvements in Material for use as a Damp Course in Building
Foundations.
I, EDWARD NELSON, trading under the name and style of F. McNeill & Co.
of the Patent Felt Works, Bunhill Row, in the City and County of London,
Felt Manufacturer, do hereby declare the nature of this invention to be as
follows:-
Hitherto the damp course in the foundation of a large building has been
produced by pitch, tar, or the like, poured on in the molten state. This is
objectionable as it necessitates that the damp course be melted on the building
premises and when the building is erected the tar, pitch, or the like, is frequently
pressed out by the weight of the superimposed building. Sometimes lead, slates,
concrete, cement, or other waterproof materials are used, but these invariably
crack or break and generally are not found suitable for the purpose.
Now the object of this invention is to manufacture material which will not crack
or break and which will not press out, no matter what the superimposed weight
may be.
The material which forms the subject of this invention is made of layers of
felt or other fibrous material between which is a layer or layers of pitch, tar
asphalte, natural pitch, or any other suitable waterproofing material or materials.
The pitch or other waterproofing material will adhere to the felt or other fibrous
material and when passed through rollers or otherwise pressed, the whole will form
a homogeneous sheet or slab of great tenacity.
If desired to strengthen the sheet or slab and to render it practically untear-
able and unbreakable I may introduce in the course of its manufacture a sheet,
strip, or piece of woven or other open wire or lattice work, or metal, string, yarn,
or other netting.
• Dated this 17th dow of D
1001
F. W. GOLBY,
36, Chancery Lane, London, W.C., Patent Agent for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Material for use as a Damp Course in Building
Foundations.
I, EDWARD NELSON, trading under the name and style of F. McNeill & Co.
of the Patent Felt Works, Bunhill Row, in the City and County of London,
Felt Manufacturer, 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 :-
Hitherto the damp course in the foundation of a large building has been
produced by pitch, tar, or the like poured on in the molten state. This is
objectionable as it necessitates that the material used for the damp course be
melted on the building premises and when the building is erected, the tar, pitch,
or the like is liable to be partially pressed out by the weight of the superimposed
building. Sometimes lead, slates, concrete, or cement are used as a damp course
in building foundations, but these invariably crack or break if the building settles.
Now the object of this invention is to manufacture a damp course material
which will not crack or break, or press out by the weight or ordinary settling of
DO77

page_text: the building, and which at the same time can be easily placed in position by ordinary
labourers and when so placed can be immediately built upon.
The material which forms the subject of this invention is made of layers of felt
or other fibrous material between which is a layer or layers of pitch, tar,
asphalte, natural pitch or any other suitable waterproofing material or materials
of a bituminous nature.
In the manufacture of the damp course material, I may use a box or mould of
suitable size, the bottom, sides, and ends of which, I line or cover with the felt or
other fibrous material. I then fill up the box or mould with the bituminous
material when in a plastic state, and cover it with a layer of felt or other fibrous
material. Or I may dispense with the box or mould and may build up the bottom
layer of felt into the shape of a box or mould, fill in the plastic material and
cover with a top layer of felt or other fibrous material. The material is then set
aside to cool and harden into a sheet or slab and may be afterwards pressed if so
desired.
To strengthen the sheet or slab and to render it practically untearable and
unbreakable when so required, I introduce in the course of its manufacture, a
sheet, strip, or piece, of woven or other open wire or lattice work, or metal, string,
or other netting.
I may use more than one layer of plastic material, but in all cases, the plastic
material is between two layers of, and is enveloped by the fibrous material.
Sometimes I mix sand, or powdered, or pulverized slag or slag wool, or
powdered or broken slate, cement, mica, and such like water resisting substances
with the plastic bituminous material, but I take care to firmly embed them in the
bituminous material.
Sheets or slabs of material made in accordance with this invention are very.
tenacious, are easily packed, and are ready for immediate use and may be placed
in position by ordinary labourers.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what I
claim is
The manufacture and use of a damp course material in sheets or slabs composed
of a layer or layers of bituminous material or materials, enclosed while in a plastic
condition within and between layers of felt or other fibrous material substantially
as described.
101 .
3003
D
101
2000
F. W. GOLBY,
36, Chancery Lane, London, W.C., Patent Agent for the Applicant.
F. W. GOLBY,
36, Chancery Lane, London, W.C., Patent Agent for the Applicant.