An Improved Preparation or Composition of Pipe Clay for Domestic Use.
Year: 1890

page_text: Date of Application, 20th Nov., 1890
Complete Specification Left, 20th Aug., 1891-Accepted, 26th Sept., 1891
PROVISIONAL SPECIFICATION.
An Improved Preparation or Composition of Pipe Clay for
Domestic Use.
I, HELEN CHRISTIE of 16 Craignestock Street, in the City of Glasgow,
Tobacco Pipe Manufacturer, do hereby declare the nature of this invention to be
as follows:-
:―
This invention relates to an improved preparation or composition of pipe clay
having for object to ensure greater durability and cleanliness in handling and more
extended application for such domestic uses as cleaning or polishing brass articles
and the like.
The improved preparation or composition is made up of ordinary pipe clay
which is suitably shaped in blocks and subjected to kiln drying there being added
to the clay before firing ground flint, earthenware or other silicious substances,
plaster of paris or ground clay-pipe waste or other calcareous substances for the
purpose of preventing the blocks splitting up in the drying or baking operation and
imparting such a degree of hardness to the prepared blocks as will prevent
formation of a slurry and consequent waste when the blocks are used with water.
Dated this Nineteenth day of November 1890.
CRUIKSHANK & FAIRWEATHER,
62, St. Vincent Street, Glasgow, Agents.
COMPLETE SPECIFICATION.
An Improved Preparation or Composition of Pipe Clay for
Domestic Use.
I, HELEN CHRISTIE of 16 Craignestock Street in the City of Glasgow
Tobacco Pipe 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 :-
This invention relates to an improved preparation or composition of pipe clay
having for object to ensure greater durability and cleanliness in handling and more
extended application for such domestic uses as cleaning or polishing brass articles
and the like.
The
The composition or improved preparation consists preferably of a mixture of
equal proportions or thereabouts of pipe clay and ground gypsum or gypsum in its
other forms of plaster of paris or stucco, the setting properties of the stucco
having been previously removed by means of burning it to a red-heat.
mixture is then worked up together along with water until it becomes a plastic
mass which is then put through a pug or other equivalent mill or machine and
shaped or pressed into blocks of any convenient shape and size. The blocks are
then dried and afterwards burned in kilns slowly for about 20 hours when they
come to a red heat. They are then slowly cooled, after which they are ready
for use.
When desired the composition may have added thereto before being kilned or
burned, any desired color which shall set or mix therewith, so as to give the stone
or other part cleaned or rubbed the same desired color.

page_text: 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
claim is.
A composition or preparation of pipe clay and gypsum or stucco, prepared
substantially as and for the purposes hereinbefore set forth.
Dated this 18th day of August 1891.
HELEN CHRISTIE.