Improvements in or relating to Accumulators or Secondary Batteries.
Year: 1899

page_text: Date of Application, 30th Mar., 1899
Complete Specification Left, 30th Dec., 1899-Accepted, 17th Mar., 1900
PROVISIONAL SPECIFICATION.
Improvements in or relating to Accumulators or Secondary
Batteries.
I. PERCY PRESTWICH, of Elm Bank, 72, Eccles Old Road, Pendleton, in the
County of Lancaster, Gentleman do hereby declare the nature of this invention
to be as follows;
-
This invention relates to an improvement in the construction of accumulators
or secondary batteries. The object of this invention is to obtain increased
surface for exposure of the active material, and also to allow of a quick discharge
of current without tendency to damage the plates. For this purpose construct
a metallic tube that may be either circular, hexagon, octagon, or of other pre-
ferred shape wings or projections radiating from the centre and extending
parallel with the tube are formed on or are attached thereto; transverse divisions
are also formed in the spaces between the wings, and apertures or slits are pro-
vided in the tube. The aforesaid spaces or cells are packed with litharge or
with red lead respectively, or other suitable active material, for either negative
or positive. A nest of tubes such as herein before described are placed vertically
or otherwise in a tank containing the dilute acid which surrounds and also fills
the tubes, percolating through the apertures in the tubes, and by these means
obtaining increased results from the space occupied.
Dafed this 29th day of March 1899.
GEO. DAVIES & SON,
Agents for the Applicant, 4, St. Ann's Square, Manchester.
Improvements in or relating to Accumulators or Secondary
Batteries.
I, PERCY PRESTWICH, of Elm Bank, 72, Eccles Old Road, Pendleton, in the
County of Lancaster, 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:-
-
This invention relates to an improved construction of accumulators or secondary
batteries. The object of this invention is to obtain increased surface of the
active material and also to allow of a quick discharge of current without tendency
to injure the plates.
In the accompanying drawing illustrating my invention Fig. I is an external view
of a tube with wings or projections and longitudinal divisions forming cells. Fig. 2

page_text: is a transverse section on line A-B. Fig. 3 is a perspective view of a portion of
said tube, and Fig. 4 is a longitudinal section of part of the tube on line C-C.
In these views similar letters refer to similar parts.
For the purpose of this invention I construct a metallic tube as a that may be
either circular as shown on drawing; or hexagon, octagon, or of other preferred
shape; wings or projections b radiating from the centre and extending longi-
tudinally parallel with the tube are either formed on as shown, or may be
attached thereto.
Transverse divisions as d are also formed in the spaces between the wings b
and apertures or slits e are provided in the tube a. The spaces or cells f that
are formed by the longitudinal wings b and the transverse divisions d are packed
with litharge or with red lead respectively or other suitable active material for
either negative or positive. In applying our invention a nest of tubes such
as hereinbefore described are placed preferably in a vertical position in a tank
containing dilute acid which surrounds and also fills the tubes, percolating
through the apertures e in the tubes, and by these means obtaining increased
results from the space occupied.
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-
In accumulators or secondary batteries a tube for placing in a tank of dilute
acid having wings or projections radiating from the tube, said wings or pro-
jections forming cells as f that are filled with a suitable active material for
either negative or positive, and apertures or slits e in the tube at the base of said
cells substantially as herein before described and shown on the drawings.
Dated this 29th day of December 1899
GEO. DAVIES & SON,
Agents for the Applicant, 4, St. Ann's Square, Manchester.