The Manufacture of an Improved Compound for Coating Walls and other Surfaces, and for analogous purposes.
Year: 1891

page_text: Date of Application, 7th Dec., 1891
Complete Specification Left, 14th Apr., 1892-Accepted, 14th May, 1892
PROVISIONAL SPECIFICATION.
The Manufacture of an Improved Compound for Coating Walls and
other Surfaces, and for analogous purposes.
I, ROMULUS NORWOOD, of 30 De Crespigny Park, Denmark Hill, in the
County of Surrey, Manufacturer, do hereby declare the nature of this invention to
be as follows:-
My invention relates to the manufacture of an improved adhesive compound for
coating walls and other surfaces and for analogous purposes.
My improved compound consists essentially of animal glue and a suitable base,
such as whiting, in such a fine state of division that, when the said compound is
mixed with cold water, an adhesive material will be produced which is very
efficient for coating and finishing walls and other surfaces.
The main object of my said invention is to produce an adhesive compound which
can be mixed with cold water and advantageously used in place of the compounds
ordinarily employed for similar purposes.
I accomplish this result by mixing animal glue and a suitable base, such as
whiting, in the requisite proportions, and then subjecting the mixture to heat. By
this treatment, the glue is brought into such a condition that it can be readily
reduced to the required degree of fineness to enable the compound to be advan-
tageously prepared for use by the addition thereto of cold water.
It may be advantageous to mix a small proportion of sulphate of zinc or an
equivalent substance with the glue and the base.
By my invention, I am enabled to produce a dry compound which can be made
available for use, for the purposes above specified, by adding cold water instead of
hot water as heretofore generally used.
Dated this 7th day of December 1891.
D. YOUNG & Co.,
11 & 12, Southampton Buildings, London, W.C.,
Agents for the Applicant.
COMPLETE SPECIFICATION.
The Manufacture of an Improved Compound for Coating Walls and
other Surfaces, and for analogous purposes.
I, ROMULUS NORWOOD of 30, De Crespigny Park Denmark Hill, in the
County of Surrey, 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 :-
My invention relates to the manufacture of improved adhesive compounds for
coating walls and other surfaces and for analogous purposes.
In the Specification of my application for Letters Patent dated
4th December 1891, No. 21,199 I have described an improved compound for
these and other purposes, which compound consists of an active base, such as
calcined gypsum, mixed with animal glue, the glue being rendered friable by the
application of heat to enable the compound to be reduced to such a fine state
of division that the said compound will work efficiently when mixed with cold
water.
The object of my present invention is to produce an adhesive compound with an
Price 8d1

page_text: inert base, such as whiting, which compound can be mixed with cold water and
then advantageously used, in place of the compounds ordinarily employed for
coating walls and other surfaces and for analogous purposes.
I accomplish this result by mixing animal glue and a suitable inert base, such
as whiting, in the requisite proportions in a moist state if necessary, and then
subjecting the mixture to heat. By this treatment, the glue is rendered friable,
and, the glue and whiting being intimately mixed, a compound is formed which can
be readily reduced to the required degree of fineness to enable the said compound
to be advantageously prepared for use by the addition thereto of cold water.
It may be advantageous to mix a small proportion of sulphate of zinc or
equivalent mineral salts with the glue and the whiting or other base.
By my present invention, I am enabled to produce a dry compound which, when
packed in tins or otherwise protected against exposure to moisture, can be preserved
for a long period and can be transported to any climate without liability to injury,
and which can be made available for use by adding cold water instead of hot water
es heretofore generally used.
In making a compound according to my said invention, I proceed as follows, that
is to say, I first mix the whiting or other inert base and the glue, with or without
the addition of water, in the requisite proportious in a suitable vessel or pan, and
then apply to the mixture sufficient heat to liberate the moisture from the whiting
or other base, when the glue will be rendered friable by the action of the said
moisture and by the heat. I then, if desired, reduce the said compound to a very
fine powder. In this manner, I make a dry compound which can be made available
for use by the addition of cold water, and which will, when applied to walls or other
surfaces, effectually adhere to such surfaces.
If the whiting or other base does not contain sufficient moisture to ensure an
efficient action upon the glue, a suitable quantity of water. is either mixed with the
whiting or other base or poured into the vessel or pan before or after the mixing
of the glue with the whiting or other base; or the whiting or other base is suitably
moistened by means of steam, the glue being added in a dry state either in the form
of powder or in lumps or pieces. Or the glue may, if desired, be dissolved in water
before adding it to the whiting or other base.
When sulphate of zinc is used, it is either introduced directly into the pan or it
is added in a finely divided condition to the compound after the latter has been
removed from the pan.
The proportions which I find it advantageous to adopt are as follows, viz.:-To
every hundred-weight (112 lbs.) of the whiting or other base, I add from five to
eight pounds of animal glue. If sulphate of zinc or equivalent substance is used,
I add from half-a-pound to one-pound-and-a-half of such substance.
Suitable colours are, if desired, added to the compound in the pan or after it
omes from the pan, to produce any required tint other than white, and, if
necessary, these colours are ground in by any convenient means.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is:
-
First. A dry compound consisting essentially of an inert base, such as whiting,
and of animal glue, both in such a fine state of division that the compound will work
efficiently when mixed with cold water.
Second. The manufacture of a dry compound such as I have hereinabove
described (with or without the sulphate of zinc or its equivalent) wherein the
animal glue is rendered friable by the application of heat, for the purpose above
specified.
Third. The improved process above described, consisting in mixing animal glue
and a suitable inert base, such as whiting, in or about in the proportions stated and
in a sufficiently moist condition, and then applying heat to the mixture for the

page_text: purposes above specified, with or without the addition of a small proportion of
sulphate of zinc or its equivalent.
Dated this 13th day of April 1892.
ROMULUS NORWOOD.
D. Young & Co.,
11 & 12, Southampton Buildings, London, W.C.,
Agents for the Applicant.