Improved Means for Producing Crucibles or Melting Pots.
Year: 1893

page_text: Date of Application, 18th Feb., 1893
Complete Specification Left, 6th Oct., 1893-Accepted, 23rd Dec., 1893
་
PROVISIONAL SPECIFICATION.
Improved Means for Producing Crucibles or Melting Pots.
I, EDWARD JOHN THEODORE DIGBY of Red Cross Street in the City of
Liverpool Gentleman do hereby declare the nature of this invention to be as
follows
--
The object of my invention is to cheapen the cost of crucibles or melting pots.
I provide Plumbago 17 core
Plumbago 80 core
Russian clay
China stone
Gas carbon-
-
-
-
-
7 parts
-
2 parts
-
5 parts
-
-
5 parts
->
2 parts.
These substances are separately ground and dressed, and afterwards placed in a
suitable mixing machine with a sufficient quantity of water for working them into
a thick paste. The mass is then well kneaded by band, after which operation it is left
to dry. until it is ready to be worked into crucibles or melting pots, in the usual
way by the potter's wheel. The crucibles are afterwards dried in a temperature
of about 150° for about 24 hours, and lastly they are placed in a kilu to be baked
in the usual way for about 48 hours. They will then be ready for use.
Dated this 18th day of February 1893.
E. J. T. DIGBY.
COMPLETE SPECIFICATION.
Improved Means for Producing Crucibles or Melting Pots.
I, EDWARD JOHn Theodore DIGBY, of 20, High Holborn, in the County of
Middlesex, late of Redcross Street, in the City of Liverpool, Gentleman, 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 my invention is to cheapen the cost of crucibles, and such like
vessels without impairing their fire resisting properties. In performing my
invention I provide the several constituents hereinafter mentioned, preferably in
the proportions hereinafter stated, that is to say:
Plumbago, in granules of a size equal to that
represented by a 17 mesh to 1 sq. in. sieve
Plumbago, in granules of ja size equal to that
represented by a 80 mesh to 1 sq. in. sieve
Russian clay
China stone
Gas carbon
•
17 parts
-
2
"
-
5
"
-
プラ
2
"
The three last mentioned ingredients are separately ground and dressed so as to
produce a fine powder. All the ingredients are then placed in a suitable mixing
machine, and a sufficient quantity of water is added for working the mass into a
thick paste which is first well kneaded with the hand, and afterwards left to dry
until it is ready to be formed into crucibles or the like in the usual way. These
vessels are dried in a temperature of about 150° Fahrenheit for about 24 hours,
after which time they are placed in a kiln to be baked in the usual way for about
48 hours. They will then be ready for use.

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 I
claim is.
1. For the manufacture of crucibles and the like, the several ingredients,
preferably in the proportions, herein stated, and treated as herein particularly
specified.
Dated this 30th day of September 1893.
EDWARD JOHN THEODORE DIGBY,
By Cheesbrough & Royston.