US1784532A - Electrode for electrolytic condensers and the like - Google Patents

Description

Patented Der. 2, 13@

*i entre starr rar-nn rre RALPH D. MERSHON, F NEW YRK, N. Y.

Application filed July 18, 1923, Serial No. 652,248. Renewed may 2, 1930. i

'llhis invention relates to electrodes for use in electrolytic condensers and the like, particularly electrodes composed of thin sheet metal (usually aluminum), and its chief ob- 5, ject is to improve such electrodes in respect .to the mechanical strength needed to meet the various conditions of act-ual use. To this and other ends the invention consists in the novel features hereinafter described.

ro @ne form of the invention, .as embodied in an electrode of the type described in my prior Patent No. 1,326,134, issued December 23,

1919, is illustrated in the accompanying drawing, in which 15 Fig. 1 is an elevation of the electrode.

F ll i"ig. 2 is a vertical section on line 2 2 of 1g. y lBig.l 3 is a horizontal section on line 3 3 ot Fig. 1.

Fig. .4l is a detail perspective view.

lFig. is a detail elevation of a portion of the electrode.

'llhe electrode illustrated consists essentially ot a crimped plate of sheet metal, preferably very thin sheet aluminum, say from two to `ve or six thousandths ofan inch thick, surrounded and carried by a suitable supporting frame. Aluminum of such thinness is extremely pliable and distorts under very slight pressure.

As stated, the plate 10 is crimped, that is, it is corrugated in form, the folds, crimps, or corrugations being deep and close together but out of contact with each other throughout theirilength. To facilitate circulation of the electrolyte and dow of current through the same when the electrodes are in use the crimps or folds may be provided with apertures in their bends.i in the form of short slits,

4e as indicated at 11.

rll`he crimped plate may be made all in one piece, but it is more convenient to make it in two or more sections, for instance three, as

` shown in Fig. 1.

rEhe supporting frame isl preferably all metal, and in the form shown it consists of vertical angle bars forming side members l2 and upper and lower cross members 13, riveted or otherwise fastened together. 'llo increase the stiffness of the cross members they are slotted at the ends, as at 14, and the intermediate portions are bent to give them a curved cross section, as shown in Fig. 2. The' edges of these bent portions may project beyond the surface of the plate l0 so that when 55 the electrode is laid down on a table or other dat surface the crimped plate will not come in Contact therewith. The tlanges on the side bars 12, extending oppositely to the bent portions ot the cross members, perform a like @u function for the other side ot' the plate.

For the purpose of holding the plate 10 securely in the trame the inner edges of the upper and lower members 13 are seated in slots 15, Fig. 2, in the upper and lower edges @5 of the plate.

Each section of the crimped plate is provided at its side. edges with vertical reinforcing or stid'ening members 16. 'llhese are preferably, made of strips of aluminum ot su- 7e cient width and thickness to give the desired strength and rigidity.

As illustrated, each of these members has longitudinal slots 17 extending inwardly from its ends, which latter are bent laterally, te preferably at right angles, as shown in Figs.

4. and 5. 'llhe strips 16 are also slotted longitudinally between the slot-s 17. To avoid weakening the parts, at least two ot these intermediate slots are provided, as 18, Fig. t, 8@ separated by a short bridge 19. For the sake of clearness, the width of the slots 18 is somewhat exaggerated in the ligure. At each side edge the crimped plate or plate section is pro.

vided with laterally extending fins 20, which e5 i extend into the slots 18 and are welded to the contiguous edges of the slots, as indicated in Fi 5.

n assembling the parts the upper and lower cross members 13 are seated in the lslots ne 15 and 17, as in lFig. 5, and the laterally bent ends of the side stideners 16 are welded to the cross members. llt the stideners 16 are wide and thick enough to give the desired rigidity they can serve the purpose of the side mema5 bers 12, but l prefer to use the latter also, in some cases at least.

rlhe dat end portions or ears 21 of theI upper and lower cross members adord convenient points t'or grasp by supporting means 10e (not shown) to hold the electrode upright in the electrolytic cell,land one or both of the ears on the upper member can be used as a point of connection with the external circuit in any suitable manner, not shown.` The stilleners 16, by their welded attachment to the crimped plates and to the cross members of the frame, aord electrical connection of good conductivity and substantial strength between the plate itself and the surrounding frame. Their mos't important function, however, is to prevent vibration of the otherwise unsupported side edges of the plate.

It is to be understood that the invention is not limited to the specific construction herein described, but can be embodied in other forms without departure from its spirit.

I claim:

1. In an electrode for electrolytic apparatus, a corrugated plate of thin sheet aluminum, and metal stiening members atthe side edges of the plate parallel with the corrugations thereof and having welded connection therewith.

2. In an electrode for electrolytic apparatus, a corrugated plate of thin sheet aluminum and longitudinally slotted stilfening members of metal at the side edges of the plate, and parallel with the corrugations thereof, said side edges extending into the slots in the stieners and welded thereto. f

3. In an electrode for electrolytic apparatus, a corrugated plate'of thin sheet aluminum, and a supporting frame of metal surrounding and secured to the plate, said frame having side members parallel to the corrugations, to which side members the edges of the plate are welded, and cross members to which said side members are welded.

4. In an electrode for electrolytic apparatus, a plate of thin sheet aluminum, and a supporting frame surrounding the plate, having cross members above and below the plate and metal side members to which the side edges of the plate are welded, said side members havin their ends slotted to embrace the inner e ges of the cross members.

5. In an electrode for electrolytic apparatus, a crimped or folded plate of thin sheet aluminum having slots in its edges extending across the crimps or folds, upper and lower cross members arranged with their edges seated in said slots, and metal side members having longitudinal slots into which the yside edges of the plate are extended and welded and having their upper and lower ends slotted o embrace the upper and lower cross memers 6. In an electrode for electrolytic apparatus, a crimped or folded-plate o thin sheet aluminum having slots in its edges across the crimps or folds, and a metal supporting :frame surrotlnding the plate having vertical and cross-members the latter arranged with 'their edges seated in said slots, the vertical members having longitudinal slots into which the side edges of the crimped plate are extended and welded, said vertical members having their ends bent laterally and slotted to embrace the cross members, and the bent ends of the vertical members being welded to the cross members.l

7. In an electrode for electrolytic apparatus, a corrugated plate of thin sheet aluminum, and metal stitfening members at the side edges of the plate parallel with the corruga- ,tions thereof and connected therewith to revent vibration of the side edges of the p ate.

'8. In an electrode for electrolytic apparatus, a corrugated plate of thin sheet aluminum, and a supporting frame of metal surrounding and secured to the plate, said frame having side members parallel to the corrugations, to which side members the edges of the plate are' electrically and mechanically connected to prevent vibration of the side -edges of the plate, and cross members to which said side members are electrically connected.

In testimony whereof I hereto aix my signature.

RALPH D. MERSHON.

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