US2198988A - Electrolytic condenser - Google Patents

Description

April 30, 1940. G. B l-NIEK ELECTROLYTIC CONDENSER Filed Au 15, 1935 INVENTOR GEORG BINIEK I BY MW ATTORNEY Patented Apr. 30, 1940 STATES ,PATNT ELECTROLYTIC (ZOIJDI'IIIfiER Georg Biniek, Berlin, Germany, assignor to Siemens & Halske, Aktiengeselischaft, Siemens stadt, Berlin, Germany, a corporation of Germany ApplicationAugust 15, 1936, Serial No. 96,174 In Germany August 15, 1935 2 filaims.

' packing, owing to the effect of air and light, is

subject to embrittling so that the electrolytic condenser and its operation will be impaired.

It has been therefore suggested in the earlier art to cover the valve body made of rubber by another body which, upon production of an inadmissibly high pressure in the interior of the condenser container would be destroyed. In this arrangement, the rubber disks are afforded comparatively little chance forexpansion.

However, it is often desirable that the valve body should be destroyed only after an overpressure has been in existence for a relatively long period of time, especially where condensers having a casing consisting of cardboard, paper, or the like are concerned, seeing that in their case a certain escape of gases is permitted to occur across the porous wall of the casing. In other words, premature destruction of the valve body, as will thus be seen, would make replacement of the condenser compulsory in spite of the fact that a normal condition might have been restored as a result of the perviousness of the wall of the cas- By the present invention, the drawbacks hereinbefore enumerated are obviated without exception, this being accomplished by the membranous part serving as a valve being covered by a curved cover part preferably consisting of a disk of cardboard material. Hence, the said diaphragm or membrane has a chance to expand first to the extent permitted by the curvature before actual rupture will happen. Atthe same time, the cover disk prevents damaging of the diaphragm from the outside.

According to another object of the invention. the diaphragm is placed upon a support, preferably a cardboard disk, and is glued thereon, but only along the circumferential portions of the cardboard disk in order to offer a larger effective surface for expansion. At the same time,

the cardboard disk serves for protecting the diaphragm when introducing the condenser.

The drawing shows an exemplified embodiment of this invention.

Fig. 1 shows the assembly arrangement partly in section;

Fig. 2 is a top view of the curved cover disk;

Fig. 3 is a side elevation of the said curved cover plate; while Fig. 4 is a top view of the cardboard disk upon which the diaphragm is fastened by gluing or cementing,

The condenser body 5 is confined inside casing 2 made preferably of cardboard, the casing being shut by means of a cardboard disk 3 as 1 shown in Fig. 4. The cardboard disk 3 has several holes 8 for the evacuation of gases.

Diaphragm or membrane A consisting, for instance, of cellulose paper is fastened by glue only on the margin or edge 5 on the cardboard disk 3. The curved cardboard disk which has gas vents 'l is pressfitted for instance, into the tubular cardboard case 2. If, then, over-pressure is set up inside the condenser case, the diaphragm 4,

made of cellulose paper will first have a chance to extend around the periphery of the curvature in cardboard disk 6. While this happens, the gases have a chance to penetrate through the porous walls of the cardboard casing 2. However, if the rise of pressure becomes unpermissibly high, the diaphragm 4 will be caused to break and thus affords a path for the gases to escape or be vented through the holes I in the cambered cardboard disk 6.

' What is claimed is:

1. A valve arrangement for an electrolytic condenser comprising a casing for said condenser body, a perforated disk-like cover having a plurality of gas vent holes at one end of said casing, a. second perforated cover curved outwardly from said first mentioned perforated cover, and a thin membrane which will rupture upon an excessive rise of internal gas pressure interposed between said first and second mentioned perforated covers.

2. A valve arrangement for an electrolytic condenser comprising a casing for said condenser body, a perforated cover at one end of said casing, a. second perforated cover curved outwardly from said first mentioned perforated cover, and a thin membrane which will rupture upon an excessive rise of internal pressure secured to the peripheral edge of said first mentioned perforated cover.

GEORG BINIEK.

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