USRE12228E - Penbttrg - Google Patents

Description

REISSU-ED JUNE 7, 1904.

J. VON DER POPPENBURG. STORAGE BATTERY ELECTRODE APPLICATION TILED NOV. 12. 1903.

- Charlottenburg,

' Storage-Battery the active material the active material from v No. 12,228.

' UNITED STATES Reis sued June 7, 1904.

- JoH NNEs vvo DER- POPPENBURG, or CHARLOTTENBURG, GERMANY.

. STORAGE-BATTERY ELECTRODE. i

s leen-"104mm? forming a; m of Reissued Letters Patent To all whom it may concern:

Be it known that 1-, J OHANNES Von DER POP- PENBURG, electrochemist, of Kants'trasse,

German Empire, have invented a certain new and useful Improved Electrode, of which the following is an exact, full, and clear description- This invention relates to anew kind of construction for electrical storage-battery electrodes, such construction being characterized in its essential features by the fact that the cross-pieces adapted for dividing or separating protrude from the fram on both'sides and are provided with ,holes at the part protruding from the frame,'through which holes pass elastic bars which press or bear against the protecting-strips that prevent dropping off. The advantage obtained thereby is that any expansion of the active material only produces a corresponding bending of the elastic bars, whereas a crackingof the protecting covering or the formation of a wide crack or crevice is perfectly excluded.

eferring to the accompanying drawings, Figure 1 is an elevation of the electrode. Figs. 2 and 3 are vertical and horizontal sections,

respectively, Fig. 2 being taken on line 3 3: of

Flg. 1

The vertical sides of the .ebonite frame a are provided'with grooves at. suitable distances apart, in'which the ends of the ebonite pieces are inserted. The "latter are so wide that they protrude from the frarnea on both sides. The'protruding parts of the cross-pieces are provided with holes, through which the ebonite into the compartments. Strips "putting thereon strips 5' protecting-plates e bars f are inserted. When makingthe electrode, the ebonite bars f are first inserted on the one side through the holes of the crosspieces, and then protecting-strips 6, consisting of thin fine perforated ebonite plates, are put of felt a; are preferably inserted at the same time as the perforated protecting-plates e. A sulficient quantity or layer of active material 3 is placed thereon, which .is covered by the lattice d.

The latter is again supplied with active material y up to the height of the frame. After of felt and perforated the ebonite bars'f are also inserting the cross-pieces, which are likewise provided with deep recesses, are Inserted-from the other side 'shape of the lattice it No. 12,2 28, dated June 7, 1904.

' Original Ila-701,389, dated June 3, 1902. Application for reissue filed November 12, 1903. SerialNo. 180,970.

on this sidefinally inserted throughtheholes' of the cross-pieces I). I,

In the above-described construction of the accumulator the-cross-pi'eces I) must all be. provlded on one side with deep recesses c for receiving the vertical latticed pieces 5. After lattice or grid must then be closed outwardly in a suitable manner.

It is preferable to act in such a manner that in the "first place cross-pieces I) are inserted only from one side of the frame, then the lattice is put into the recesses provided for it in the cross-pieces, and finally the remaining of the frame,, as shown in Fig. 2. In this manner the lattice is made more secure and also-the warping of same is most eflectively prevented. 1

The perforated protecting-plates e are pre ferably supported in such a manner that they also cover the orifices produced by the recesses at the edge of the cross-pieces b.- v

The frame is jections or lugs for receiving the current-conductor m. The recesses are so constructed that it is possible provided above with the pro-' to insert corres'pondinglyformed ebonite slides 2' and It, so that the current-conductor is fully protected against damage on the part of the electrolyte.- I v The herein-described construction has the advantage that: notwithstanding the grid allows of the lattice when it has become inoperative being readily replaced Without disturbing the main part of the formed material. ebonite, bars f onboth sides are removed, whereupon the electrode, with the slides z' and In, is placed aboveupon a suitable support. The perforated pr'otectin plates, which are located above, are lifted ofl',.along with the strips of felt belonging thereto, the cross pieces 6, which are inserted from this side, are drawnout, the slides i and l: removed, and the formed material, which is located across the lattice, is out out in strips corresponding to the lattice; The damaged lattice can then be replaced by .a

(ll the recesses g and h, which have recesses For this purpose the new one. After the inser- ,I o

tion of a new'lattiee the strips of formed material which were previously cutout are reinserted and the other removed parts again put in their places. i

The insertion of a new lattice is made more simple if the cross-pieces Z: are inserted alternately from different sides. In this case only those cross-pieces need be removed again that were inserted from the side at which the slides 1 and k are located. I

Having now particularly described and ascertained the nature of the said invention, I declare that what I claim,- aud wish to secure by Letters Patent, is

An improved storage battery electrode comprising a non-conducting frame. independently removable cross-pieces of non-conducting material carried by the frame and having perforated portions projecting on each side thereof, perforated protecting-strips, active material interposed between said strips, and removable vertical elastic bars held in said perforations in the cross-pieces adapted to press the protecting-strips against the active material, substantially asdescribed.

In witness whereof I have hereunto set my hand in the presence of two witnesses.

JOHANNES VON DER POPIENBURG.

Witnesses: I HENRY HASPER, WOLDEMAR HAUPT.

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