Improvements in Acetylene Lamps, by the Use of Porous Vessels or other Suitable Materials, Permitting the Transudation of Water.
Year: 1897

page_text: is Print is in accordance with the Original Specification as it stands after
Amendment (under Section 18 of the Patents, &c. Act, 1883), as allowed by the
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is Print is in accordance with the Original Specification as it stands after
Amendment (under Section 18 of the Patents, &c. Act, 1883), as allowed by the
decision of the Comptroller General on the 28th day of January 1899.
Date of Application, 15th July, 1897
217th
سلسل
1007 Mocanted 11th Doc
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Improvements in Acetylene Lamps, by the Use of Porous Vessels
or other Suitable Materials, Permitting the Transudation of
Water.
I, EDWARD JOSHUA EDWARDES, of 13, Broadhurst Gardens, South Hampstead,
London, Doctor of Medicine, do hereby declare the nature of this invention to be as
follows:
The use of a porous container holding calcium carbide, which container is placed
in an outer vessel holding water, which gains admission to the carbide only by passing
through the pores of the said container.
The transudation of the water through the porous vessel to its interior, causes a
very gentle and continuous formation of acetylene within the interior of the porous
vessel or container, by the action of the water upon the carbide inside the porous
vessel.
An exit is provided for the gas, which, thus produced, and burnt by the aid of a
suitable burner, affords a steady light.
To stop the production of the gas, the porous vessel is either removed from the
outer vessel, or lifted and kept above the level of the water in the outer vessel by
any suitable device.
The porous vessel may be made of porcelain or any other suitable material.
Dated this Wounteanth day of July 1897
Improvements in Acetylene Lamps, by the Use of Porous Vessels
or other Suitable Materials,, Permitting the Transudation of
Water.
I, EDWARD JOSHUA EDWARDES, of 13, Broadhurst Gardens, South Hampstead,
London, N.W., Dector of Medicine, 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 :---
Acetylene gas is formed when water and carbide of calcium are brought into con-

page_text: tact. The essence of my invention is that water transudes to the carbide through
any suitable material of a porous nature; so that the gas is gently and continuously
disengaged.
This principle may be utilized in various ways. The water may be allowed to pass
through the walls of a cell wholly or partly porous, whether it pass from without in-
wards, or from within outwards, or across a porous diaphragm or partition, and the
cells may be variously combined in use.
For example, if a porous cell of suitable size and consistency be charged with
carbide of calcium in suitable quantity, and have a suitable cover and exit tube
adapted, whether the exit-tube be through the cover or otherwise, such a cell has
only to be placed in water to a suitable height and the formation and gentle dis-
engagement of acetylene gas will ensue; and by the aid of a proper burner such an
apparatus forms a simple and safe method of using acetylene for lighting purposes;
in fact it forms a simple and safe portable acetylene lamp. To stop its action we
have only to remove the porous cell from the water, or to remove the water from the
porous material, whereupon action gradually ceases.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is
The use of a porous material, or porous materials, as the sole means whereby water
is brought into contact with carbide of calcium, in the formation of, or in order to
form, acetylene gas as above described.
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