The Manufacture or Production of Paints.
Year: 1893

page_text: Date of Application, 12th Sept., 1893
Complete Specification Left. 12th July. 1894-Accepted, 8th Sept., 1894
PROVISIONAL SPECIFICATION.
The Manufacture or Production of Paints.
We, WILLIAM VIRGO WILSON of May Bank Margery Park Road, Forest
Gate, in the County of Essex Consulting Chemist and WALTER BISHOP PRIEST
of 50 Fenchurch Street in the City of London Solicitor do hereby declare. the
nature of this invention to be as follows :-
The object of this invention is to produce paints of an improved character.
According to this invention we take lead hydrate and if it be not already in an
amorphous condition we prefer to bring it to that condition which may be effected
for example by the application of heat in a stove. To the lead hydrate we add a
pigmentary substance or substances such as barium or calcium sulphate calcium
carbonate lead carbonate or hydrated lead carbonate iron, oxide, ochre, umber,
seinna or like materials and the said mixture can be ground in oil to bring them
into a condition for use:
Dated this 12th day of September 1893.
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, Agents.
COMPLETE SPECIFICATION.
The Manufacture or Production of Paints.
We WILLIAM ALFRED WILSON and RICHARD HENRY CHARLES WILSON
Administrators of WILLIAM VIRGO WILSON deceased late of May Bank,
Margery Park Road, Forest Gate in the County of Essex, Consulting Chemist
and WALTER BISHOP PRIEST of 50 Fenchurch Street in the City of London,
Solicitor 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 :-
The object of this invention is to produce paints of an improved character.
According to this invention we take lead hydrate which is in an amorphous
condition and add to it barium sulphate or calcium sulphate or calcium carbonate
or any two or all of them. We intimately mix and thoroughly incorporate the
lead hydrate with the barium sulphate or other of the said substances. This may
be done in any convenient manner as for example by grinding them together under
edge runners.
We prefer to mix the lead hydrate and barium sulphate or other of the said
substances in the proportion of one equivalent of lead hydrate to two equivalents
of barium sulphate or other of the said substances; for example in the case of
barium sulphate 120.5 parts by weight of lead hydrate to 233 parts by weight of
barium sulphate, this being rather more than one part by weight of lead hydrate
to two parts by weight of barium sulphate. The mixture should not consist of less
than 25 per cent. by weight of lead hydrate. The paints produced may be made
and sold in the form either of dry paints or of paints ground in oil or of paints
mixed with sufficient oil to be ready for use.
The lead hydrate and the said barium sulphate, calcium sulphate and calcium
carbonate are separately unfitted for use as paints but when the lead hydrate is
used together with barium sulphate or other of the said substances as above
described the paints thus formed are of great body and covering power.

page_text: The materials above mentioned may or may not have mixed therewith &
pigmentary or colouring body or pigmentary or colouring bodies such for example
as zinc oxide, iron oxide, ochre, umber or sienna.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
1. The manufacture or production of paints from lead hydrate and barium
sulphate, or calcium sulphate, or calcium carbonate or any two or all of them
substantially as hereinbefore explained.
2. The manufacture or production of paints from lead hydrate and barium
sulphate, or calcium sulphate or calcium carbonate, or any two or all of them and
together with a pigmentary or colouring body or pigmentary or colouring bodies
substantially, as hereinbefore described.
Dated this 19th dox of July 1801
JOHNSONS & WILLCOX,
47, Lincoln's Inn Fields, London, W.C., Agents.