US1247123A - Plate-guard for secondary batteries. - Google Patents

Description

J. 0. LUTHY.

PLATE GUARD FOR SECONDARY BATTERIES.

Arl ucmou FILED APR. 16. 1917.

1 3. Patented Nov. 20, 1917.

JOSEPH '0. Lurnv, or s ananteater mars.

riders-sneer roe. SEGQNDLQRY assist memes.

To all whom it may concern.

Be it known that I, Josnrn O. 'LU'rH'Y, a citizen of the Republic. Switzerland, residing at San Antonio,-county of Bexar, and

State ofjil exas, have invented I-certain new and useful Improvementsin Plate-Guards for Secondary Batteries; and I do hereby envelops for secondary battery plates, and

' sections united along their meeting edges by a suitable binding medium, the parts being declare thefollowing to bee full, clear, andv exact description of the invention, such as Wlll enable others skilled in the art to'which itappertains to make and use the same.

The invention relates to guard sheaths or has for'its object to provide a light,strong and relatively cheap frame of acidproof material, preferably formed of two homologous so arranged and disposed as. to coverand protect the exposed metal edges of the battery plates, andte admit of separator sections of porous or pervious material being appliedand rem ved by way of the bottom part of the framl, held iii proper covering juxtapositio toboth faces ofthe battery late, so that the'plate is supported and rigidly held against vibration, buckling and other internal and external forces, and the separators are maintained in proper relation to prevent short circuiting of adjacent plates, disintegration of the filling material, breaking of the separators or of the jars or containers, and at the same time, providing for free vertical and transverse circulation of the electrolyte, with respect to the plate. Theparticular construction and arrangement of the frame and the separators associated therewith, are such as to 'prevent disintegration of the metallic frame of the plate grid, due to local action, to admit of thinner plates and thinner eparators being used and, at the same time, to minimize the danger of breaking the jars or containers, due to movement of the plates, and to practically eliminate the effect of self-discharge and the so-called growing. of the negative battery plates.

The invention is illustrated "in the accompanying drawings, in which Figure 1 is a perspective view of the bat-1 tery plate havin the improved sheath or envelop applied t ereto;

Fig. 2 is a similar view of one of the two homologous sections iwhich go to make up the frame; and

, Specification Letters Edwin's; Application filed Avril 16,1917. 'Srial leases,

reteste timer). tear,

plate and? separators] re- Referring to the drawings, indicates the positive plate of a secondary battery,

whichmay be of any approved. or desired form and which, as illustrated, s similar to that shown 'in a companion application, {died of even date 'hQI'QWlllll, S8I'l3.l-; NO 16%,399, which application relates to another specific form and mode of applicationofthe generic invention. I

According tothe present inventiomg-the sheath or envelop comprises a,-strong,'-rigid open framework of-i'acid-proof ;;material, preferably celluloid, formed. of twohomologous sections, adapted to surround the? plate X and to support separators of porous. or

pervious slabs of woodor'the like, 1n proper covering relation to the faces of the plate,

the two sections ofthe aframe be'ing united at their meeting edges, ;whi ch preferably-lie in the -median longitudinal .plane of the I plate. Each of the frame sectionsis :prefer ably formed as an integral unit of molded celluloid.

Each of the frame sections comprises face flanges 1, 2, 3- and 4 disposed in quadrilateral relation with flange 5, formed of relatively thin celluloid and defining panel-like openings. The end members of each section consist of L-shaped elements formed by a flange 7 and a reinforcing and spacing element 6, the element- 6 constituting a. rectangular corner post which projects inwardly of the frame section transversely of the side flanges and the end flange. A'crossthe bottom of the frame.

section is an L-shaped member comprising a bottom horizontal flange 8 and a vertical flange 9, connected to the end flanges 7 and the longitudinal faces of the corner members 6, respectively. The intermediate, flange 5 is provided with a strengthening rib 19 which extends vertically of the frame section from bottom to top, and to the lower end of which, the vertical flange 9 of the bottom L member is secured.

It will be particularly noted-that the construction and arrangement of the bottom L member and the bottom face flangeiQ leaves two unobstructed openings 11, 11 through an intermediate cross the bottom of the frame section, through.

which separator slabs 13, preferably formed of wood orlike pervious material and having channels or corrugationson their inner faces, may be inserted and removed, the said separator slabs, when inserted to proper'position, overlying the adjacent faces of the battery plate, as clearly illustrated in Fig. 1.

In applying the sheath or envelop to a battery plate two of the frame sections, such as illustrated in Fig. 2, are applied to opposite faces of theplate, so that the metallic edges of the latter .are substantially enveloped and inclosed by the channel-like recesses formed by the elements 6 and 7 atthe respectiveiends of the plate sections and by the flanges 8 and 9 forming the bottoms of the frame sections. The meeting edges of the "frame sections are then rigidly secured together, as hereinbefore indicated, so that the battery plate is completely surrounded and inclosed by the skeleteti. frame, and the metallic portions of the plate about its edges are protected against access of the electrolyte by theengaging and en-* joined at their meeting edges, each section veloping' portions of the. frame sections. The separator slabs 13 are then slid into position through the bottom openings 11 and the plate is ready to be assembled with the other cooperating plates constituting the completebattery or cell. The bottom openings 11 in the frame not only permit the ready insertion and removal ofthe separator slabs, but also allow a free vertical circulation of the electrolyte along the faces-of the battery plate, which is found to be absolutely necessary to the efficient operation of thecells, of which the plate constitutes a component part.

joined at their meeting edges, each section including L-shaped end and bottom members embracing the corresponding edges of the plate, and marglnal top, bottom and side flanges, the bottom flange being spaced from v the vertical element of the L-shaped bottom member to afford-space for the insertion and removal of the-slabs aforesaid and free circulation of the electrolyte.

' 2. A. sheath or envelop for secondary battery plates comprising a rigid frame of acid-proof material, and slabs of porous material held in said frame in covering juxtaposition to the faces of the plate; said frame being formed of two homologous sections including l.-shap'ed end and bottom members embracing the corresponding edges of the plate, marginal top, bottom and side flanges, and a vertical intermediate strength ening rib having lateral flanges, the bottom flange being spaced from the vertical element of the L-shaped bottom member to afford space for the insertion and removal of the slabsaforesaid and free circulation of the electrolyte.

In testimony whereof I aflix my signature.

aosnrjn o. LUTHY.

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