Improvements in the Manufacture of Pellets for Igniting Gas.
Year: 1898

page_text: Date of Application, 3rd June, 1898
Complete Specification Left, 3rd Mar., 1899-Accepted, 8th Apr., 1899
Date of Application, 3rd June, 1898
Complete Specification Left, 3rd Mar., 1899-Accepted, 8th Apr., 1899
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Pellets for Igniting Gas.
We, HORACE WOODWARD CROWTHER, of The Beeches, West Bromwich, in the
County of Stafford, Chemist, and HENRY GRAHAM HARRIS, of "Collamore," Upper
Tooting, in the County of Surrey, Engineer, do hereby declare the nature of this
invention to be as follows:-
'
It is known that pellets of various materials which have been platinised; or
incorporated with platinum by coating the same in a solution of chloride of
platinum, drying and igniting in hydrogen will become heated, when brought
into contact with a mixture of ordinary coal gas and air. Pellets made of platinised
kieselguhr or infusorial earth have been suggested for this purpose see the
Patent of Jurgens and Jurgens No. 29828 of 1897. The object of our invention.
is to reduce considerably the quantity of platinum that is necessary and to ensure
certainty of action in all temperatures and all states of the atmosphere.
We mix with the kieselguhr or material of which the body of the pellet is
composed, matter that can be burnt or dissolved out and will be much reduced in
bulk on heating such as pure paper pulp, raw cotton, or hemp, or silk. We also
use asbestos to cause the various portions of the pellet to cohere and also to act as
a mechanical binding material.
A mixture we find very suitable is 50 to 70 parts of kieselguhr, 20 to 30 parts
of purified asbestos, and 10 to 20 parts of paper pulp, or similar matter, all in a
dry state. These are well mixed together and made into a soft mass with distilled
water. The mass is then moulded into pellets of suitable size, dried in
a water bath, and then saturated with a solution of platinum chloride (PtCl) and
again dried, and is then ignited for some time in an atmosphere of hydrogen.
For causing the ignition of the gas each pellet is made to carry a spiral of very
fine platinum wire which is preferably threaded through a hole in the pellet
before soaking with the solution of chloride of platinum and is treated with the
pellet in the subsequent operations as we have found it advantageous that the
wire should have "reduced" platinum on it, otherwise it is only with difficulty
that the wire incandesces even after the pellet itself has become heated.
Dated this 2nd day of June 1898.
Improvements in the Manufacture of Pellets for Igniting Gas.
We, HORACE WOODWARD CROWTHER, of The Beeches, West Bromwich, in the
County of Stafford, Chemist, and HENRY GRAHAM HARRIS, of "Collamore," Upper
[Price 8d.]

page_text: Tooting, in the County of Surrey, Engineer, 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:-
It is known that pellets of various materials which have been platinised, or
incorporated with platinum by coating the same in a solution of chloride of
platinum, drying and igniting in hydrogen will become heated, when brought
into contact with a mixture of ordinary coal gas and air. Pellets made of platinised
kieselguhr or infusorial earth have been suggested for this purpose, see the
l'atent of Jurgens and Jurgens No. 29828 of 1897. The object of our invention
is to reduce considerably the quantity of platinum that is necessary and to ensure
certainty of action in all temperatures and all states of the atmosphere.
We mix with the kieselguhr or material of which the body of the pellet is
composed, matter that can be burnt or dissolved out and will be much reduced in
bulk on
heating, such as pure paper pulp, raw cotton, or hemp, or silk. We also
use asbestos to cause the various portions of the pellet to cohere and also to act as
a mechanical binding material.
A mixture we find very suitable is 50 to 70 parts of kieselguhr, 20 to 30 parts
of purified asbestos, and 10 to 20 parts of paper pulp, or similar matter, all in a
dry state. These are well mixed together and made into a soft mass with distilled
water. The mass in then moulded into pellets of suitable size, which are dried in
a water bath, and then saturated with a solution of platinum chloride (PtCl) and
again dried, and are then ignited for some time in an atmosphere of hydrogen.
For causing the ignition of the gas each pellet is made to carry a spiral of very
fine platinum wire which is preferably threaded through a hole in the pellet
before soaking with the solution of chloride of platinum and is treated with the
pellet in the subsequent operations as we have found it advantageous that the
wire should have "reduced" platinum on it, otherwise it is only with difficulty
that the wire incandesces even after the pellet itself has become heated.
Having now particularly described and ascertained the nature of our said in-
vention and in what manner the same is to be performed we declare that what we
claim is:
1. In the manufacture of pellets for igniting gas mixing with the material of
which the body is composed matter which is removed or reduced in bulk by heat-
ing or dissolving.
2. The manufacture of pellets for igniting gas from a mixture of kieselguhr or
infusiorial earth, asbestos, and paper pulp or similar matter, saturated with a
solution of platinum chloride substantially as described.
3. In the manufacture of pellets for igniting gas attaching a fine platinum wire
to the body and soaking them in a solution of platinum chloride and drying sub-
stantially as described.
4. Pellets for igniting gas substantially as described.
Data: 911