US1750374A - Electrical condenser - Google Patents

Description

2 Sheets-Sheet l IZVENTOR March 1l, 1930. H. R. VAN DEVENTER ELECTRICAL CONDENSER Filed Feb. 14, 1924 March 11, 11930a H. R. VAN DEVENTER M7503@ ELECTRICAL CONDENSER Filed Feb, 14, 1924 2 Sheets-Sheet 2 Patented Mar. 11, 1930V UNITED STATES PArE-Nr OFFICE HARRY R. VAN DEVENTER, OF NEW `YORK, N. Y., ASSIGNOR TO DUBILIER CONDENSER CORPORATION, OF NEW YORK, N. Y., A CORPORATION F DELAWARE ELECTRICAL CONDENSER Application filed February 14, 1924. Serial No. 692,785.

'Ihis invention relates to condensers; especially condensers for electrical circuits.

An object of my invention is to provide a condenser that is of simple, inexpensive and durable construction, and capable of easy connection to the circuit of which it is to form a part.

Further objects and advantages will appear from the following description and drawings, but the disclosure is explanatory only, and I may make such changes in the shape, size and arrangement of parts as lie within the nature and scope of the invention.

On the drawings,

Figure 1 is a perspective view of a con denser, according t0 my invention;

Figure 2 is a diagram to illustrate the interior construction thereof;

Figures 3 and 4 are respectively a top and an end view of another form of condenser according to my invention;

Figure 5 is aside view of a further modiication;

Figures 6, 7and 8 are respectively a top, an end and a. side view of another form of condenser according to my invention; and

Figures 9 and 10 are respectively top and end views of still another modification.

The same numerals identify the same parts throughout.

Referring first to Figures 1 and 2, I show a condenser having a base plate 1 of bakelite, or other insulating material, upon which is a so-called stack 2, madeup of a number of sheets of conductive material separated from one another by a suitable dielectric.- The manner in which the sheets are arranged is indicated diagrammaticall;r in Figure 2, wherein 3 denotes a sheet of conductive material, such as tin-foil, to be disposed longitudinally of the condenser, and 4, a similar sheet arranged transversely of the rst sheet,

so as to extend across one end of the first 45, sheet, with the ends ofthe sheet 4 projecting beyond the sides of the sheet 3, and the sheet 3 projecting a material distance beyond one side of the sheet 4. Between the two sheets is a sheet of insulating or dielectric material,

such as mica 5. As many of the sheets 3, 4

and 5 as are needed are employed and the top and bottom sheets of the stack 2 will, of course, be of mica or the like, so that all of the sheets of foil are properly insulated, covered and protected. The mica sheets are about as wide and as long as the plate 1, and

a little wider than the sheets 3, and the ends of the sheets 4 project beyond the sides ofthe mica sheets 5 also. At one end of the condenser the sheets of mica will project a little beyond the sheets of foil 3 and 4, while at the opposite end, the extremities of the longil tudinal sheets of foil 3 will project beyond the mica, so' that these extremities of the sheets 3 can be brought into contact\, with 65 one another and with a terminal, so as to enable the condenser to be connected in the circuit of which itis to form a part. These ends of the sheets of foil 3 can be engaged by an-element in the form of a clip 6, which is attached to the adjacent end of the condenser so as to grip the stack 2, and the base plate 1 Jfrom one side to the other. The projecting ends of the foils 3 can be bent against the end of the condenser and over upon either the base plate 1, or the top of the stack 2, so

as to be in contact with the clip 6; and as this clip is to be preferably of metal, it will serve as a terminal, and a conductor joined thereto will unite all of the foils 3, of one polarity, into circuit.

I also employ a pair ofclips 7 attached to the opposite sides of the condenser and extending along said sides to the end thereof, opposite the end carrying the clip 6. All of the clips 6 and 7 are U-shaped, having parallel arms or portions 8, with connecting parts 9. Hence, the body of the condenser, consisting of the base plate 1 and stack 2 can bermly gripped by these clips, so that thestack 2 is 90' clamped securely against the base plate 1,l and the clips serve as securing means for holding the base and stack firmly together. The rojecting extremities of the cross foils 4 can e laid against the opposite sides of the condenser and folded down against either the top of the stack 2, or the lower face of the ibase.plate 1, so that when the clips 7 are" attached, these clips, which are likewise preferably of metal, will both make contact with either vof the side clips 7, which are, theremeans, such as a clip 17 Both the clip andv fore, adapted to serve as terminals of the foils 4, which are of opposite polarity with respect to the foils 3, these foils 4 can be connected in circuit. I may provide the end clips 6 with lugs 10, having apertures 11; also with lugs 12; the lugs 10 extending from the arms 8 1n opposite directions at the top and'bottom faces of the condenser, and like- Wise with the lugs 12. In other words, at each side of the condenser where the end clip 6 is placed, there will be a lug 10 and a lug 12,

but at one side the perforated lug 10 will be uppermost while on the opposite side these lugs will be reversed, and the lug 12 will be uppermost. Each of the side clips also has a lug 10 and a lug 12 formed by cutting or stamping the metal of the Aparts 9 of these clips; the lug'lO of each side clip leaving a cut-away space 13, when it is bent outwfard, and the lug 12 a cut-away space 14. These lugs 10 and 12 of the side clips are shown as so arranged that the lugs 10 are located adjacent the base plate 1; while the lugs 12 are located adjacent the top of the stack 2. But the lugs 10 are not in transverse alinement and neither are the lugs 12; for example, the lug 10 of one side clip is near to the adjacent extremity of the condenser than the other; and so with the lugs 12. The placing of these lugs 10 and 12 as shown in Figure l is simply for convenience in mounting the condenser and attaching conductors to same. The clamps 6 and 7 provide means for engaging and compressin the edges of the condenser over substantially the whole extent of the periphery of the condenser, to hold the sheets of conductive material and insulation together. Thus the clip 6 grips both faces of the condenser along the end shown as the right end thereof in Figure 1, and the two clips 7 grip the two faces of the condenser along the edges at the opposite sides thereof and at the left end as well, because these two clips extend towards each other; and the spaces between the two clips 7, and between these clips and the clip 6, are relatively small.

Figures 3 and 4 show another form of condenser, comprising a base plate 1, a'stack of condenser elements 2, and a cover plate 15 of insulation'on the top of 'fthe'stack 2. Une end of the base plate has an. extension 16 and part of the sheets of foil, such as the foils 3, will project out over this extension 16 and be secured4 against same by suitable the extension will be perforated to receivean eyelet rivet 18, to hold the clip tightly against the extension. Along the sides of the base plate 1 and cover plate 15, will be clips 7 and one of these clips will have a perforatedflug 10', extending out beyond the end of .the`

condenser, opposite the end bearing the element 17.

As in the case of the condenser shown in Figure 1, the extremities of the foils 4 will be directly engaged by the side clips 7. The projecting ends of the foils 3 may be long enough to be pierced by the rivet 1 8, or shorter so as to be simply held by the clip 17 against extension 16.

Figure 5 shows a type of condenser similar to that of Figures 3 and 4, except that the base plate 1 has no extension 16, and I employ a terminal element or plate 19 of some conducting material, which has the shape indicated in Figure 6. As illustrated`the plate 19 may lie on the base plate 1, with the ends .and be in Contact with the plate 19, or the extremities of all these sheets of foil 3 may project out and be secured upon the extended end 20 of this terminal plate 19 in the same way as they are secured to the extension 16 in the condenser shown in Figure 3. To bring the projecting ends of the sheets of foil against the extension 20 of the plate 19, and secure them permanently to this extension and in electrical contact therewith, I may employ a clip such as the clip 17, with a rivet 18, as in Figure 3; or any other suitable means, such as merely an eyelet rivet 18 to pass through v,the

ends of the foils, and an aperture 21 in the extheir ends projecting from the sides o f the stack to be engaged as above described by the side clips 7, which as in the case of the condenser shown in Figures 3 and 4, will include a perforated lug 10 carried by one of these clips, and-projecting beyond the opposite end of the condenser, to enable a terminal to be attached thereto. This lug 10 and extension 20 besides enabling the condenser to be connected in circuit, may also serve as convenient means to enable the condenser to be mounted upon a support. Figure 5 is shown as if broken away at one end, to present the ends of the foils 3 in contact with the plate 19.

In the condenser shown in Figures 6, 7 and 8, I employ a base plate 1 and a cover plate 15 with a 'stack 2 between them, and a terminal plate 19, having one end 20projecting out, as in the case of the condenser shown in Figure 5. But I replace the clips 7 with a band clamp 22, which extends around the condenser and has its end 23 turned down against the cover plate 15. This clamp is provided with a perforated lug 24, extending from one side thereof inline with the perforated extension 20 of the lterminal plate 19. The sheets of foil 3 will be'united at their ends to the terminal plate 19, and the remaining foils 4 will project at the opposite sides .of the condenser, to be enga-ged by the clamp 22. The condenser in Figure 6 1s shown as 1f broken away along one side to illustrate the plate 19. v

In Figures 9 and 10, I illustrate acondenser site sides of the condenser vtowards the other of thesame construction as thatshownin Figures 6, 7 and 8, except that in this form the ends 23 of the clamp 22, meet each other,

and one end of the clamp is provided with projections 25, which are received into correspondingly shaped recesses 26, inthe other end, so that the whole of the body of the condenser is encircled by the clamp and the projections 25 and recesses 26 will cause the ends of the clamp to interlock and thus aiord uniform pressure of the clamp against the plates l and 15 over their whole area. Y

Having described my invention, what I believe to be new and desire to secure and protect by Letters Patent of the United States l. A condenser comprising a base plate, sheets of conductive material separated by a dielectric, one of said Asheets extending across the end of another,l said other sheet projecting a material distance beyond one side of the rst sheet, said first sheet having one or both its extremities projecting beyond the adjacent side edge or edges of said other' sheet, a clip extending across one end of the condenser and engaging the base late and the adjacent extremity of said ot er sheet, and separate clips extending along the oppo-v end, said last named clips engaging the base plate and the ends of the first sheet, whereby the said sheets and said base irmly together. Y y

2. A condenser comprising a base plate,

lsheets of conductive material separated by a dielectric, one of said sheets extending across the end of another, said other sheet projecting a material distance beyond one sidelof the first sheet, said first sheet having one or both its extremities projectingbeyond the adjacent side edge or edges of said other sheet, a clip extending across one end of the condenser and engaging the base plate and the adjacent extremity of said othersheet, and-separate clips extending along the opposite sides of the condenser towards the other end, said last named clips engaging the base plate andthe ends of the rst sheet, whereby the said sheets and said base plate are held firmly together, the clip at the end of the condenser having lugs projecting therefrom at opposite sides of the condenser, and the clips at the sides having sides of the condenser.'

In testimony whereof I aiiix 1n signature.

' HARRY R. VAN DE NTER.

-lugs cut therefrom to project at the opposite plate are held

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