Container for electrolytic condensers

June 11, 1940. a m. georgiev 2,203,902

CONTAINER FOR ELECTROLYTIC CONDENSERS Original Filed June 23,· 1934

<img file="US2203902A_D0001.tif" />

Patented June 11, 1940

2,203,902

UNITED STATES PATENT OFFICE

2,203,902 CONTAINER FOR ELECTROLYTIC CONDENSERS

Alexander M. Georgiev, Dayton, Ohio, assignor to General Motors Corporation, Detroit, Mich., a corporation of Delaware

Original application June 23, 1934, Serial No.

732,119. Divided and this application November 26, 1937, Serial No. 176,479 (Cl. 220—89) which extend to the inside of the container and are connected in any suitable manner with the electrodes 28 of the condenser section 14. The other terminals serve for the connection of an electric motor with a power source in case where ⁶the condenser is used in connection with the electric motor and is directly mounted thereon.

Due to the flow of currents of considerable magnitude in the condenser, an appreciable amount of heat is generated which naturally is ¹⁹accompanied by a corresponding expansion of the air and vapors within the sealed container. In case the condenser becomes excessively overheated, the following provision is made for permitting the escape of the highly compressed air ¹⁰and vapors from the sealed container. As best shown in Fig. 4, the cover 16 is provided with an opening 30 of two different diameters and an internal shoulder 32. Resting on the shoulder 32 and extending across the opening 30 is a diaphragm 34 of flexible or better resilient material such as rubber, and press fitted or otherwise secured in said opening 30 is a washer 36 which clamps the diaphragm 34 against the internal shoulder 32. In case the air and vapors ²⁶in the sealed container 12 become too hot and therefore excessively compressed, the unclamped portion of the diaphragm will become ruptured and the air and vapors may then escape therethrough. f ³ (Fig. 5 discloses a modification of the arrangement disclosed in Fig. 4. In Fig. 5, the cover 16 is provided with a similar opening 40 of two different diameters and an internal shoulder 42. A disc 44 of resilient material such as rubber is 35 originally placed on the top surface 46 of the .cover and directly above the opening 40 thereof.

An eyelet 48 is then pressed into the opening whereby the disc 44 is pressed against the side walls 50 and the internal shoulder 42 thereof, 40 whereby a central portion 52 of the disc is slightly stretched. Again when the air and vapors in the sealed container become too highly compressed under excessive heat generation of the condenser, the stretched diaphragm portion 52 45 will become ruptured and permit the compressed air and vapors to escape from the container.

The diaphragms 34 and 52 naturally permit a limited expansion of the air in the sealed container as for instance during the reforming of 50 the condenser, due to the ability of a portion of either diaphragm to stretch within the elastic limits of the diaphragm material.

While the embodiment of the present invention as herein disclosed, constitutes a preferred form, 55

Claims.

This invention. relates generally to electrolytic condensers and more particularly to containers for dry or substantially dry electrolytic condensers being a division of S. N. 732,119, filed June 5 23, .1934, now U. S. Patent No. 2,125,373.

It is an object of the present invention to provide a container of good heat dissipating material for electrolytic condensers particularly of the dry or substantially dry type, in which an appreciable amount of heat is generated due to the flow of currents of considerable magnitude.

It is another object of the present invention to seal the containers in a manner that the seal is not affected by a heat treatment to which the ¹⁵ condenser may be subjected subsequently.

It is another object of the present invention to provide an improved vent plug in sealed containers of electrolytic condansers.

Further objects and advantages of the present ²⁰ invention will be apparent from the following description, reference being had to the accompanying drawing wherein a preferred embodiment of the present invention is clearly shown.

In the drawing:

Fig. 1 is a perspective view of a condenser embodying the present invention.

Fig. 2 is a cross-section through the condenser^

Fig. 3 is a top view of the cover.

Fig. 4 is an enlarged fragmentary section taken ³⁰ on the line 4—4 of Fig. 3.

Fig. 5 illustrates a modification of the disclosure in Fig. 4.

Referring to the drawing, there is shown an electrolytic condenser 10 of the dry or substan35 tially dry type. This condenser comprises an open container 12 within which is located a form wound and subsequently flattened conventional condenser section &lt;4. The open container is closed by a cover 16. The container 10 is made 40 of any suitable metal having good heat dissipating properties such as tinned steel, and consists of side walls 18 which are formed from one piece and the ends thereof sealed together by soldering or otherwise, and a bottom 20 which is secured 45 to the side walls 18 by preferably soldering the drawn rim 22 of the bottom to the side walls 18. . The cover 16 is molded preferably from Bakelite or hard rubber and has a metal rim insert 24 preferably of the same material as the container 50 18. As best shown in Fig. 2, the rim 24 of the cover 16 overlaps the side walls 18 of the container and is soldered thereto in order to form a perfect seal. Also molded in the cover 16 are a plurality of terminals 26 all of which extend 55 to the outside of the sealed container and two of

2,203,802 it is to be understood that other forms might be adopted, ail coming within the scone of the claims which follow.