Improvements in the Manufacture of Pottery, and in Plastic Compositions therefor.
Year: 1892

page_text: Date of Application, 16th July, 1892
Complete Specification Left 17th Apr. 1893-Accepted. 17th June, 1893
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Pottery, and in Plastic
Compositions therefor.
1, EDWARD JOHN TOMPKINSON, of 17 Clive Street, Hanley, in the County of
Stafford, do hereby declare the nature of this invention to be as follows:-
:―
This invention for improvements in the manufacture of pottery, and in com-
position therefor has for its object to manufacture telegraphic insulators, match
pots or strikers, and the like by machinery instead of by hand as hitherto, and to
provide a new composition for match strikers.
In manufacturing pottery according to this invention plastic clay forced from a
pug mill through an outlet of suitable form and cut to the desired length, or dust
clay is put in dies or iron. frames and pressed to the desired shape. If dry dust
clay is used preferably the pressure is applied to both sides of the mould.
The plastic composition for match strikers consists of a mixture of red marl clay,
grey marl clay and sand.
Dated this 15th day of July 1892.
COMPLETE SPECIFICATION.
Improvements in the Manufacture of Pottery, and in Plastic
Compositions therefor.
I, EDWARD JOHN TOMPKINSON, of 17 Clive Street, Hanley, in the County of
Stafford, Potter, 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 for improvements in the manufacture of pottery and in plastic
compositions therefor has for its object to manufacture telegraphic insulators,
match pots or strikers and the like by machinery instead of by hand as hitherto
and to provide a new composition for match strikers.
a
In manufacturing pottery according to this invention the plastic clay forced from
pug mill through an outlet of suitable form and cut to the desired length or dust
clay is put in dies or iron frames and pressed to the desired shape. If dry dust
clay is used preferably the pressure is applied to both sides of the mould.
The accompanying drawing shows an apparatus for manufacturing telegraphic
insulators, constructed according to this invention.
When the insulator is to be inoulded from plastic clay, the clay is put in a pug
mill, the outlet from which is circular and of the same diameter as the largest
diameter of the insulator. The continuous cylinder of clay as it issues from the
mill is cut in the desired lengths automatically or in a manner similar to that
employed in an ordinary brick machine for cutting the bricks to the proper width
by parallel wires.
A short cylinder of clay formed as above described or in other suitable manner
or clay dust is put in a mould box A provided with a movable bottom B and the
core or die C is then forced into the clay so as to mould the inside of the insulator by
means of the screw D working in the frame E. The pitch of the screw D is the
same as that of the screw thread on the core or die C so that the core or die as it
descends also rotates and forms a perfect screw in the clay and also can be readily
withdrawn after it has moulded the inside of the insulator. The core or die is then
withdrawn from the mould and the moulded insulator is forced out of the mould by
J
OJI

page_text: means of the counterweighted lever F. The moulded insulators are finished on the
outside by turning in the usual manner.
The plastic clay composition for forming strikers for matches consists of a mixture
of grey marl clay, red marl clay and sand. A good and suitable composition is
formed by mixing equal parts of the three substances but I do not desire to limit.
myself to this proportion, my object being to form a sandstone earthenware very
similar to ordinary sandstone.
The whole match holder or only the part on which the matches are struck may
be made of this composition; and in the latter case the match holder proper and
the stand may be made in ordinary earthenware or other suitable material.
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 :-
1. The improved method of manufacturing telegraphic insulators and the like
substantially as described.
2. The apparatus for moulding telegraphic insulators and the like substantially
as described,
3. The composition for forming match striking surfaces substantially as
described.
Dated this 17th day of April 1893.
WHEATLEY & MACKENZIE,
40, Chancery Lane, London, W.C., Agents.