US2509846A - Casing for electrical condensers or other apparatus - Google Patents

Description

y 1950 P. A. 'sPomNe 2,509,846

CASING FOR ELECTRICAL CONDENSERS OR OTHER APPARATUS Filed June 27, 1945 Patented May 30, 1950 CASING FOR ELECTRICAL CONDENSERS OR OTHER APPARATUS Percy Archibald Sporing, Hampton Hill, England, assignor to The Telegraph Condenser Company Limited, North Acton, England, a British com Application June 27, 1945, Serial No. 601,828 In Great Britain April 12, 1944 Section 1, Public Law 690, August 8, 1946 Patent expires April 12, 1964 3 Claims. 1

The present invention relates to casings for electrical condensers or other apparatus, such a casing comprising a tube open at one or both ends, and closure being effected by means of a disc inserted in the open end or in each open end, as the case may be, and retained in position by spinning over the edge of the tube, with or without the intervention of a gasket. It is common practice to form on the tube a short distance from its open end or each open end, as the case may be, an internal beading on which the closing disc rests and against which it is retained by the spun-over edge of the tube. The disc is commonly formed to constitute or support either a boss or the like, whereby the casing and its contents are mechanically supported, or a terminal whereby electrical connection to the condenser or the like is effected. In mounting the casing by employing such means or in tightening the terminal or the like, it is commonly necessary to apply a turning force which is transmitted to the disc, resulting in a tendency to rotate it relatively to the casing. Should this occur, the eifectiveness of the closure afiorded by the disc may be impaired, or such rotation may be disadvantageous for other reasons, and it is the main object of the present invention to overcome this drawback.

According to the invention, the internal beading on the tubular casing is interrupted at one or more places so that the beading is constituted by a corresponding number of arc-shaped portions, and there are provided on the internal surface of the end disc projections corresponding in number, size, and location with the interruptions in the internal beading. Thus these projections extend into the interruptions and abut against the ends of the arc-shaped sections of the beading so that rotation of the disc is prevented.

In order that the invention may be clearly understood and readily carried into effect, it will now be described more fully with reference to the accompanying drawing which illustrates, by way of example, one form of casing, initially open at one end only, made in accordance with the invention and wherein:

Figure l is a, longitudinal section of the casing, and

Figure 2 is a cross section on the line 2-2.

Referring to the drawing, a rolled electrical condenser l surrounded by insulating material 2, is contained within a casing 3 of aluminum or other suitable metal permanently closed at one end as indicated. Closure of the other end is effected by means of a, disc 4, also suitably of aluminum, which rests on an internal beading 5 in the casing 3, being held in position by spinning over the open edge of the casing 3 as seen at 6. As indicated most clearly in Figure 2, the beading 5 is interrupted so that it comprises three arcuate sections with intervening plain portions of the casing 3. Correspondingly the closing disc 4 is formed on the inside with three projections I each of which subtends an angle substantially equal to that subtended by the plain portion of the casing lying between two sections of the beading 5. Thus opposite sides of each projection 1 abut against sections of the beading so that, when the disc 4 is in position, it cannot be rotated relatively to the casing 3.

The disc 4 is formed with a central external boss 8 which is screw-threaded as indicated for the reception of one or more nuts 9 whereby the completed unit may be fixed in position or to permit of its being screwed into a supporting panel or the like. The boss is formed with a central aperture [0 through which leads l I from the condenser I may extend. After assembly of the unit, but before insertion of the closing disc 4, the condenser I may be sealed off with a suitable compound l2.

If desired, the sections of the heading 5 might be made to subtend unequal angles, so that the disc 4 could be inserted in one position only.

In the following claims, reference to the open end of the tube is to be read as applicable, not only to the open end of a tube already closed at one end, but also to each end in the case of a tube open at both ends.

What I claim and desire to secure by Letters Patent of the United States is:

l. A casing for electrical apparatus comprising a tube having an open end, an internal beading formed on said tube a short distance from its open end, said internal beading being interrupted at least at one place so that it is constituted by a corresponding number of arc-shaped portions, a closing disk in contact with said beading, and projections located on that face of said disk in contact with said beading and extending between and engaging on said arc-shaped portions.

2. In a container of the character stated, a tubular casing having at least two inwardly directed projections on the inner wall adjacent to one end, said projections being disposed in spaced relation in a common plane perpendicular to the length of the casing, a closing disk disposed within the said end of the casing between said projections and the adjacent casing end, and axially extending members carried by said relation in a common plant'perp'endiciilar to the 1 length of the casing, said projections having an arcuate form directed circumferentially of the casing, a closing disk disposed within the said end of the casing between said projections and the adjacent casing end and engaging the projections, and axially extending members carried by said closing disk on the inner face thereof, each of said members being disposed between two projections and having a circumferential extent substan'tiailly-:ec1ual to thedistamce between two projections and being of a length to engage the adjacent projections.

PERCY ARCHIBALD SPORING.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,986,339 Hartzell Jan, 1, 1935 2;049;671 Sprague Aug. 4, 1936 2,113,126 Baer Apr. 5, 1938 "2,244,395 Hill June 3, 1941

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