US1870950A - Electrical condenser - Google Patents

Description

Aug. 9, 1932. DUIBILIER 1,870,950

ELECTRICAL CONDENSER Filed Sept. 9 1926 V/ 7 Z :4 I IIIIIIIIII IIIlIIIIlII/IIII/I/III/[III/[E g INVENTOB Wdham Dahlia BY h W ATTORNEY Patented Aug. 9, 1932 UNITED STATES PATENT OFFICE WILLIAM DUBILIER; OF NEW ROCHELLE, NEW YORK, ASSIGNOR TO DUBILIER CON- DENSER CORPORATION, OF NEW YORK,

npnc'm car,

n. Y., a conromrronor nnmwenn connnnsnn Application filed September 9, 1926. Serial No. 184,532,

' This invention relates to electrical condensers; especially electrical condensers of unchanging capacity. I

An object of the invention is to provide an electrical condenser having amolded covering that completely houses and seals up the body of the condenser, requires a comparatively small amount of insulation; andthus reduces to a minimumthe losses which the presence of such a substance entails.

The nature of the invention is set forth the following description, and the novel features are defined in the appended claim; but the disclosure is explanatory only, and Ireserve the right to make any changes that do" not exceed the scope and meanings of the broad terms in which the claim is expressed.

On the drawing Figure 1 is a perspective view of a condenser according to my invention;

Figure 2 is a longitudinal section; and Figures 3 and 4 are similar views of modificaticns. 1 I Y The same numerals identify the same'parts throughout.

The condenser comprises a body 1 whichv can be made up in the usual way'by interleaving sheets or plates of metal such as metal foil with intervening sheets-of insu lation, part of the sheets of metal foil of one polarity projecting from one extremity of the body or stack, of the condenser as indicated at 2, and the remaining sheets of metal foil of opposite polarity project fromthe opposite end of the stack, as indicated at 3, and the projecting ends of the sheets of foil of opposite polarity 2 and 3 can be folded down upon the top of the stack and be united to contacts 4 and 6 respectively; these contacts being in the form of plates or strips ilar to the condenser of Patent No. 1,833,- 392, issued November 24, 1931. In that patent, however, I describe the casing as provided with a closure consisting of a sheet of bakelite which is received in the open topof the casing 8 and has openings through which the'terminals 4 and 6 project, and the bakelite is held in place by turning down the upper edges of the sides of the casing 8 around the rim of the top thereof, so as to press down upon the top of the sheet'of bakelite all around the periphery thereof. v

"With such a construction, however, the

body of the condenser cannot always be enclosed by the casing in a leak-proof manner, and I find it advantageous to use in place of the bakelite plate, a closure 10 of molded insulation which can be bakelite, or any suitabl material. This closure is held in place by the inturned edges 9 of the vrim or mouth of the casing 8, projecting into the edges of the molded closure 10, and this closure may fit snugly upon the top of the body of the condenser and engage the bases 5 and 7 of the terminals {1 and 6, and the top of the body 1. The insulation may also fill the spaces between the body of the condenser and sides of the casing 8. Between the body of the condenser or stack 1 and the bottom of the casing 8, is a sheet of insulation 11.

By this procedure I obtain a covering for the condenser which is partly of metal and partly'of insulation, and molded together. The stack 1 is securely sealed in the covering, and by reason of the fact that the insulation 10 comprises only the top of the casing and constitutes a closure therefor, the amount of insulation is relatively small and the losses due to theinsulation in operation are reduced.

In Figure 3 I show a condenser comprising a metallic casingv 12 containing a suitably clamped body or stack 13 made up of sheets beinglconnected to the bottom of the casing 12, andthe other being connected to a high.

tension stem or terminal 14. The casing 12 is closedat the sides and bottom as before,

but open at the top, which has a rim 15 surrounding a shoulder 16. On this shoulder 16 rests the closure 17 which, as before, consists of suitable insulation, molded so as to engage the top of the condenser, and having a central boss 18 through which the stem or terminal 14 projects. This construction also makes a perfectly leak-proof fitting.

In Figure 4 there is having a clamped condenser 20therein, and this condenser has a central stem or terminal 21 which projects through the center of a restricted neck 22 at the top of the casing 19. The mouth of the neck is engaged by a closure 23, which as before, is of molded insulation, molded around the edge of the mouth of the neck. and efliciently engaging same- Having described my invention, what I- believe to be new and desire to secure and rotect by Letters Patent of the United tates is 1-7- A condenser comprising a body, a casing to receive said body, said casing having an opening therein, and a, flange at the rim thereof, terminals connected to said body, the body and terminals being imbedded and fixed in an insulating compound, the said compound overlying the rim portion of the casing and forming a cover therefor.

In testimony whereof I aflix my signature.

WILLIAM DUBILIEB.

a metallic casing 19

Images