Improvements in Secondary Batteries or Accumulators.
Year: 1895

page_text: Date of Application, 4th June, 1895
Complete Specification Left 3rd Mar 1896 Accented 4th Apr 1898
PROVISIONAL SPECIFICATION.
Improvements in Secondary Batteries or Accumulators.
I, THEODOR EREMIN, of Ivanovo-Wosnessensk, in the Empire of Russia,
Engineer, do hereby declare the nature of this invention to be as follows:-
The object of this invention is an improved system of electric accumulators or
secondary batteries characterized by the peculiar arrangement and mode of placing
the plates or electrodes in the external vessel whereby the following advantages
are obtained: 1st the plates are absolutely prevented from buckling; 2nd the
active material is not allowed to drop out or separate from the frames where held;
and 3rd a solid adhesion of said material to the frames is secured, as also a
constant position, not altered by shocks and the like, of the plates in the external
vessel.
!
For this purpose I fill up the spaces between the adjacent plates and the
plates and the walls of the vessel with some material which is not attacked by the,
chemical substances used in the accumulator and, on the other hand, having
no effect on the chemical processes which take place during the time the.
accumulator is in action; such as broken glass, small hollow glass globes, coarse
sand, or the like.
The frames for holding the active material are manufactured of pure lead or a
corresponding alloy either by casting or by bending strips or bands of lead. If
the material is available in rolls, strips of desired length are cut therefrom by
means of a cutter working in such a manner that the strip will be shaped to the
proper transverse section; the strip cut out is bent to form a frame, having for
instance worm-shaped stay pieces. If, however, the frames are made by casting,
their form will be somewhat modified as by providing diagonal stay pieces. It is.
evident that the frames may vary as regards their form or shape according to the
dimensions of the plates; for instance, in a frame to be used for large plates it may
be made of grid shape. In general, the frames are to be constructed in such a
manner that the active material will be solidly held in the spaces of the frames
and that its proportion to the inert material be as great as possible. The positive
frames are covered with minium, wrapped in asbestos paper and pressed. On the
negative frames a layer of litharge is applied, and then they are also wrapped,
in asbestos paper or parchment and pressed. The frames thus prepared are
placed on the bottom of the vessel without supports or stands, as the active
material do not pass away, after which the space between the plates and the borders
of the vessel is filled up with broken glass, small hollow glass globes, coarse sand
or the like.
This done the adjacent plates are soldered together with the corresponding rods
and the accumulator tightly closed by a resin layer. Through this layer passes a
tube reaching to the bottom of the vessel and designed for emptying the apparatus.
of acid, if necessary, a tube for the escape of gases and a funnel for introducing
additional acid which is seldom required. Such an arrangement affords besides
the aforestated advantages further practically valuable advantages: viz. no creeping
sulphates are formed; the external contacts and joints are always clean and need
attention, and the electrodes may be easily inspected as their construction is very
simple.
LTF
1
T
1005

page_text: resin d. Through this layer d passes a tube e reaching to the bottom of the vessel
and designed for emptying the apparatus of acid, if necessary, a tube f for the
escape of gases and a funnel 9 for introducing additional acid which is seldom
required. Such an arrangement affords besides the aforestated advantages further
practically valuable advantages viz. no creeping sulphates are formed; the
external contacts and joints are always clean and need no attention, and the
electrodes may be easily inspected as their construction is very simple.
:
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:-
An electric accumulator characterized by arranging the positive and negative
plates shaped as frames, filled with active material and wrapped in asbestos paper
parchment or any similar material, in the common vessel in such a manner that the
spaces between the adjacent plates and the latter and the walls are filled with
broken glass, small hollow glass globes, coarse sand or other material indifferent to
the chemical reactions which take place in the accumulator.
Dated this 3rd day of March 1896
HASELTINE, LAKE & Co.,
45 Southampton Buildings, London, W.C., Agents for the Applicant.