Year: 1895

page_text: Date of Application, 26th Apr., 1895
Complete Specification Left, 26th Feb., 1896-Accepted, 28th Mar., 1896'
We, CHARLES PERCY SHREWSBURY, Engineer, FRANK LAURENCE:
MARSHALL, Gentleman, and JOHN COOPER, Gentleman, all of No. 8, Furnival's
Inn, Holborn, in the City of London, and JOHN LASKEY DOBELL, of Traine,.
Modbury, in the County of Devon, Electrician, do hereby declare the nature of
this invention to be as follows:-
This invention relates to improvements in or connected with that class of primary.
electric batteries in which the dissolving or positive electrode is composed of
carbonaceous material and the negative electrode of iron or other suitable metal or
material and in which the exciting liquid is a nitrate of a suitable metal or a
mixture of such nitrates fused by the aid of beat and caused to continuously
circulate through the battery.
In such batteries, the carbon electrodes have been suspended within the fused
nitrate without any covering and considerable inconvenience has frequently arisen.
in consequence of detached pieces of the carbon electrodes becoming mixed with
the fused salt and from other causes.
Now, for the purpose of the present invention we arrange the carbon electrodes:
within suitable porous cells or pots which are suspended from the lid or cover of
the battery. The said cells or pots must be of such dimensions that sufficient space
is provided between the lower end thereof and the bottom of the cell to admit of
the requisite circulation of the fused salt.
One great advantage obtained by enclosing the carbon electrodes within porous
cells or pots as hereinbefore described, is that the fused salt immediately sur-
rounding such electrodes is in a comparatively quiescent state, thereby facilitating
the chemical combination of the oxygen of the fused salt with the carbon electrode,.
whilst the carbonic acid gas resulting from such combination readily escapes at the.
top of the cell or pot free from other gases or vapours.
Dated this 26th day of April 1895
VAUGHAN & SON,
Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements in or connected with Electric Batteries.
We, CHARLES PERCY SHREWSBURY, Engineer, FRANK LAurence.
MARSHALL, Gentleman, and JOHN COOPER, Gentleman, all of No. 8, Furnival's
Inn, Holborn, in the City of London, and JOHN LASKEY DOBELL, of Traine,
Modbury, in the County of Devon, Electrician, 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, reference being had to
the drawing hereunto annexed and to the letters marked thereon, that is to say :-
Our said invention relates to improvements in or connected with that class of
primary electric batteries in which the dissolving or positive electrode is composed
of carbonaceous material and the negative electrode of iron or other suitable metal
[Prue 8d.l

page_text: or material and in which the exciting liquid is a nitrate of a suitable metal or a
mixture of such nitrates fused by the aid of heat.
In such batteries, the carbon or positive electrode has been suspended within the
fused nitrate without any covering and considerable inconvenience has frequently
arisen in consequence of detached pieces of the carbon electrodes becoming mixed
with the fused salt and from other causes.
Now, for the purpose of the present invention, we arrange the carbon electrodes
within suitable porous cells or pots which are suspended from the lid or cover of
the battery. The said cells or pots must be of such dimensions that sufficient
space is provided between the lower end thereof and the bottom of the cell to admit
of the requisite circulation of the fused salt.
Referring to the drawing which represents a vertical longitudinal section of a
portion of a battery having the present invention applied thereto :-
a. represents the body of the battery which may as heretofore proposed be
constructed of iron a represents partitions which sub-divide the battery into a
number of cells through which the fused salt is caused to circulate and which
constitute, with the body a. of the battery, the negative electrode, and b. represents
the cover of the battery which is formed of iron or other suitable conducting.
material and is provided with apertures 6 surrounded by countersunk ledges b³.
c. represents a porous pot which is formed with a rim or flange cand this
porous pot is placed in position through one of the apertures 6 until its flange c¹
rests upon the ledge of the lid by which means it is suspended in the required
position so that a suitable space is provided between the lower end thereof and the
bottom of the cell or battery a. to admit of the necessary circulation of the fused
salt under and around the same.
The carbon plates d. constituting the positive electrode are suspended within the
porous pots c. by means of iron or other suitable conducting covers d' provided with
escape holes d which covers are in electrical contact with the cover b. of the
battery and are thus electrically coupled together.
The cover b. is supported by a flange a² on the inner face of the body a. of the
battery and is insulated therefrom by a non-conducting rim a³.
The cover b. carries one terminal and the body a. of the battery has the other
terminal fixed thereto.
By enclosing the carbon electrodes d. within porous cells or pots c. as hereinbefore
described, the fused salt immediately surrounding such electrode is maintained in a
comparatively quiescent state and the carbonic acid gas resulting from the action
of the electrolyte and the carbon electrode readily escapes at the top of the cell
or pot c. through the hole in the cover or carbon holder d', free from other gases
or vapours.
Having now particularly described aud ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
In combination with a battery in which the exciting fluid is a fused salt and the
dissolving electrode carbonaceous material, a porous pot immersed in the fused salt
and enclosing the carbonaceous electrode, in manner substantially as herein shown
and described and for the purposes stated.
Dated this 26th dex of February 1806
VAUGHAN & SON,
Agents for the Applicants.