US1056299A - Battery-plate separator. - Google Patents

Description

H. E. PRATT.

BATTERY PLATE SBPARATOR.

APPLIOATION FILED MAR. z5, 1912.

lgggga Patented Mar.l18, 1913.

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ATTORNEYS TiflilES @Affili-lh HERBERT E. PPs-ATT, OF NEVI YORK, N. Y., ASSGNOR T0 GOULD STORAGE BATTE-RY CGIIANY, A CORPORATION OF NEW YORK.

BATTERY-PLATE SEARATOR.

Specification of Letters Patent.

Application led 'March 25, 1912.

atented Mar. its, :im 3. serial au. 635,973.

'tor the plates of storage batteries and the like.

@ne object ot my invention is to provide a new swarming means for such plates which will keep the corners and edges of the plate troni coming together, keep them from crushing' the wood or pervious separatingv sheets used in such batteries, and which will prevent lead growths "from one plate to another about the edges of the separator, thus avoiding' short circuits.

Further objects, features and advantages will more el arl'v :ppear Jfrom the detailed descriptimi given below taken in connection with the accompanying; drawing which 'forms a part of this specification.

ln the drawing. Figure l a perspective illustrating two battery plates with one toi-rrL ot my improved separating means ther-ehe wn, certain parts ln ing broken awa \v lo more clearly show the construction; Fig. L) is a section through a battery cell illustrating z; vertical side view of the plates and separating' means.; Fig. 3 is a horizontal section taken through the Aparts shown in Fig. 'l g ifiI e is a similar section but showing a modilled arrangement; and Fig. 5 is another ilar section but showing a still further n dirlearrangement.

' 'to r l, 2 and 3, l represents Reiger :fr one oi the l d plates ot a Storage batter Y, which plate .nay be posit-ive or negative,

.and 2 indicates the next plate of opposite polarity. S a thin sheet of hard rubber whieh is ihn v perforated with holes-4 over its salutare except that the side edges 5 are importer-aie Ytor a. substantial width, as flea shown in Figs. l'and 3. The-sheet il liesar cent and parallel to the plate l, and next to the rnbbe' sheet 3 is a sheet of woofl separating material G, such as wood veneer K xoved wood ot any suitable or well known kind. Between the sheet. t3 and the platt 2 l place another hard rubber sheet T which is perforated with holes 8, eX- cep that .the edges il thereo.C are lett im perforate for a substantial width. The plate T is made thicker at the edges so thatl it passes about the end of the narrower sheet G to form spacing means l0 which space the two sheets G and 7 apart, the space hereL between being shown at l1. As shown in Fig. 3 the portions l0. are recessed to receive the edges of the sheet 6, and are vnlcanized to the edges 5 of sneet 3. It will be understood that the rubber sheets Z3 and T are of material impervious to the electrolyte l2 of the cell, while the wood veneer sheet is made of material which is pervious to the electrolyte ofthe cell.

Vixen wood veneer alone is used, it necessarily comes into Contact with the plates, and this is found to injure or shortenthe lives of the plates. But by placing the rubber sheets 3 and 7 between the wood separator (3 and the plates l and 2, the wood veneer is kept out of Contact with both plates, which preserves the plates very inaterially. rlhe perlorations in the rubber sheets allow ofa ready passage tor the electrolyte therethrough to act on the plates while the space lll allows the wood veneer to become evenly permeated with the electrolyte over substantially its entire area. ltI will be noted thatl rubber sheets and T have their outer tacos lying 'close to and againstthe inner faces ofthe plates l and f 2, and' thus these rubber sheets aid in holding the paste. or active material in or onto the plates l and Q. rl`he wood sheet performs its well known functions while the rubber sheets keep it out ot' contact with the plates l and 2. The corners ot the plates l and are apt to curl or tend to curl and out through the wood veneer, tor-:ning a short circuit or injuring the saine. This is prevented by the inter-.position of the rubber sheets. Also the tirrn and rifid hard rubber separating means extends from one plate to the other at the side o't the plates so that the tendency ot the plates to curl an not cause the hard rubber plates to crush the wood sheet. This is facilitated by making the vwood sheet of less width than the plates. Moreover, since the rubber sheets prevent the wood troni touching` the act-ive plates,

' not performing the side edges oi' and 7, the possibility of lead .round the edge of the Wood veneer ed, thus preventing short circuits ns eens-e. iodine-ation shown in Fig. @is suble saine as the :form of separating itigs. l, 2 and 3, except that rined on the opposite side of wei i Yfrom the space 1l in order that e roilvte may have more ready access anlially the entire surface on this the wood sheet. This is accomplished rising the thickness of the side edges the sheet 3 away from the wood. l inoditication shown in Fig. 5 is sub l v the same as that shown in Fig. 4, nat the wood sheet 6 is of the same i the rubber sheets Which are sepaereby and the sheets 3 and 7 are also una); 'from the plates l and 2 as at "this is accomplished by increas- ;ness the side edges 5 and 9 at liti to form suitable spacing means. 'z this form the electrolyte is given l e to act on the plates, neverthernolmr sheets do not hold the active t in such a benecial manner, as dein connection with Figs. 3 and 4. 3.. termine; the spacing,l means by the thickness of the side edges 5 to provide suitable spacing means and t), it is obvious that separate spacing strips may be placed adiacent said side edges and the parts secured together' in any suitable manner, or both rubber sheets may be made integral with one another.

Although l have described my improvements in great detail and with respect to certain particular embodiments thereof, nevertheless, l do not desire to be limited to such details except as clearly specified in the appended claim, since many changes and modifications may Well be made without depar ing from tlie spirit and scope of my invention in its )roadest aspects.

Having fully and clearly described my invention, what I claim as new and desire to secure by Letters Patent, is:

Separating means for storage battery plates, embracing a separating sheet of material pervous to the electrolyte, and a sheet on each side of saidpervious sheet, said last mentioned sheets being perforated and substantially impervious to the electrolyte, and secured together at their side edges about the pervious sheet.

In testimony whereof, I have signed my naine to this specification, inthe presence of two subscribing witnesses.

HERBERT E. PRATT. Witnesses:

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