Патент USA US2127352код для вставки
Aug- ‘16, 1938’ w. DUBILIER 2,127,352 CONDENSER Fig]. ’ Original Filed Oct. 12, 1932 3/ 30 95% m w 2 ' ha I M m 3 8 2y m 4‘ m L Q M. Q -_- @iéSi ‘I 5 // I, \g INVENTOR ll gill/0m Dub/'l/elr 6M, ML ATTORNEYS 6 2,121,352 Patented Aug. 16, 1938 UNITED-STATES PATENT-OFFICE 72,127,352 _ CONDENSER William‘ Dubilier, New Rochelle, N. Y., assignor to’ Dubilier Condenser Corporation, New York, N. Y., a corporation of Delaware Application October 12, 1932, Serial No. 637,415 Renewed July 3, 1937 ' a 13 Claims. (Cl. 175-41) sponding to Fig. 1 but slightly spread and en electrical devices, and containers therefor, and larged for clearness. This invention relates to condensers and similar more particularly to such devices when associated with a liquid, such as an insulating oil. 5 For the purposes of this speci?cation the term “condenser” includes other electrical devices which will function when sealed within a con tainer; and the term “oil” includes other liquid insulating or impregnating materials. 10 It is important that the condenser be well sup ported within its container, and the requisites of the container are vthat it keep the oil in, keep moisture out, and that it afford mechanical pro tection and support. 15 2 . In the several ?gures like reference characters indicate like parts. The container for' the condenser shown in Figs. 5 1 and 2 is provided with double walls consisting of a thin metal can I and an outer enclosure 2 of heavy metal. Cushioning material is disposed between the inner and outer walls preferably at the top and bottom, as illustrated by spacers 3 10 and 4, of cork, rubber composition ‘or the like. The can I should be a snug ?t within the en closure 2 mm little space between their side walls, but if desired additional cushioning mate Two types of such containers are in common rial may be- inserted therebetweenw The spaces 15 use, one of which is formed of thin sheet metal between the walls may be ?lled with melted com having its seams soldered, as in a sardine can, pound indicated at 3a (Fig. 4), such as wax, in and is therefore limited to small and light weight _ lieu of spacers 3 and 4 or in combination there devices. Containers of this ‘type are cheap but with. afford little mechanical protection-to the device Since the inner can I is made of thin metal, enclosed therein and they are easily damaged, such as tin, it is easily formed and soldered, with consequent leakage. The other type is made thereby providing an oil and moisture tight en ‘ of heavy metal to provide an oil tight container closure for a condenser 5. The outer can 2 need with suf?cient- mechanical protection. The cost 25 of such containers is high, whether they are made with soldered or welded joints, or made seamless by drawing or casting; a large part of the cost being due to the necessity of making them tight to oil and moisture. Additional expense and dif 30 ?culty "are involved in welding or soldering the not be oil tight, its chief purposes being to pro vide mechanical protection and ‘support for the inner. can and the condenser. For this reason the enclosure 2 can be made very cheaply by bending up sheets of heavy metal and spot-weld cover on such a. container due to the large amount ing the joints. A closure member or bottom cover 6 can ‘be secured by a riveting or bending opera 30 tion, or both; Preferably this cover consists of a of heat absorbed by the heavy metal walls and metal plate having its sides 1 and 8 bent up to the danger of injuring the condenser therein. In either type the scams or joints are directly ex 35 posed to mechanical shocks which may break them and cause leakage. closure 2 andhaving its end portions secured by The object of this invention is to make a con tainer'which is easily sealed to oil and moisture and which gives greater protection against leak 40 age and mechanical shocks than either type aforementioned, at less cost than the heavy type and occupying about the same or less space. A further object is to support a condenser within the container in . ?xed, spaced relation to the 45 walls. The invention will be described in connection with the accompanying drawing showing one em bodiment thereof and in which Fig. 1 is a view partly in section, of a container 50 with a condenser and its support therein, accord ing to the invention; Fig. 2 shows the external appearance thereof on ., a smaller scale; _» ' ‘ Fig. 3 shows a support member; and Fig. ,4 is a fragmentary sectional view corre engage the corresponding sides 9 and ll! of en eyelets H to projecting feet I! and I3 of the en closure. vFor additional security, the corners M of cover 6 are bent down to engage the upper sides of projections l2 and I3. The projecting feet are thus made doubly thick with triple thick ness at the corners,,to provide a rigid mounting , 40 base for the device. ‘ Fig. 3 shows details of a portion of a support ‘or - clamp which holds the condenser 5 and serves to space the condenser from the walls of can I, at the same time preventing movement of the con denser within the container. The support com prises a U-shaped metal member l6 adapted to rest on thebottom of the container with its sides ?tting between opposite walls thereof and with extensions l1 and ID on its bottom portion ?tting between the other two walls of the container. The condenser 5, as shown in Fig. 1, usually con sists of a number of oil ?lled sections l9 stacked 7 one above the other, each section having-‘foils of opposite polarity exposed Vat/opposite 'ends, 2,127,352 '2 thereof. These condenser sections are stacked in the member IS with their foil ends projecting in scribed, the cushioning effect between the two walls absorbs and distributes mechanical shocks, thereby preventing injury to the soldered seams the direction of extensions -l‘I-.and l8 respectively, and spaced therefrom. The sides of the sections of the inner wall'so that they remain oil tight even though the device be subjected to mechan may bear directly against the sides of the mem ical abuse. The double-wall construction also ber it but insulating liners may be inserted be prevents accidental puncture of the inner wall tween the bearing surfaces if desired. The sup port for the condenser is completed by another . by sharp instruments, a frequent cause, of trou U-shaped member 20 which bears against the'top ble with “tin can” type containers. The protec section of the condenser and is held in place by tion afforded by the outer walls permits the use 10 10 the bent-over ends II and 22 of member 18. Members l6 and 20 thereby form a clamp for the condenser sections which are preferably held under pressure while the ends II and 22 are bent 16 over. Liners 23 provide insulation for the clamp. . The can I is made sumciently long to provide spaces between the foil ends and the walls of the can so that, when the clamped condenser is with in the can, the projections l1 and II keep the foil ends in spaced relation to the walls. Lateral movement of the condenser is prevented by the of thin metal for the oil tight portion of the con tainer even though the enclosed electrical device has considerable size and weight. These advan tages are obtained with a double-walled contain er having the same or smaller outside dimen 16 sions than a single walled container of the same inside dimensions because of-the space required for upstanding seams and thick welds to make the latter container'oil tight. The manufacturing cost of such a double walled container is less than the cost of the sides of the member II and its projections l1 and I heavy single-wall type due principally to the sim ll. The portions oi the \members It and 20 plicity of its parts and the ease with which they are joined. The condenser can be sealed in which project above the condenser prevent move the inner can without excessive heating thereof ment of the condenser in a vertical'direction. The condenser sections are electrically con ' because of the small heat capacity of the thin nected by metallic strips, such as 24, extending metal walls. Joining the parts of the other en closure presents no difficulty when the joints need from one section to another in the spaces be not be oil'tight, and no heat is required to com tween the foil ends and the walls of the con tainer, such connections being made before the plete the outer enclosure after the condenser is condenser is inserted in the can. In Fig. 1 placed therein. As an example, a heavy metal all of the sections are connected in parallel, but can of a certain size and made oil tight costs series or series-parallel connections may be used $2.50 plus-the labor required to seal the cover after the condenser is inserted therein, which op or the sections may be connected to form sepa rate groups. I The members it and 20 provide and maintain su?icient space between the top .of the conden ser and the top of can i for terminals, such as 25 and 2G, and leads, such as 21 and 28, electri cally connecting the terminals with the con denser. The terminals 25 and 26 are prefer ably secured to the top of the inner can I and insulated therefrom by means of insulating washers 28; holes 30 in the can being made con siderably larger than the terminals. The wash ers 29 are sealed by cement or varnish. The top of the outer can 2 is provided with‘openings 3i and is otherwise adapted to accommodate the washers and terminals. Suitable connecting 50 lugs 32 are secured to the terminals for conven ience in making electrical connections; , The above mentioned spaces between the to and sides of the condenser 5 and the can I are made no longer than is necessary to provide eration is complicated by the large amount of as heat required and consequent danger to the condenser. Compared to this cost, a double walled container of the same size costs only 30 or 31 cents, of which 12 M13 cents is the cost of the inner can and 18 cents is the cost of the outer enclosure. ' The manufacture of a container in accordance with this invention requires less expensive equip ment and such equipment is more readily adapt ed to diiierent sized containers than the equip ment required for the manufacture of oil tight. heavy metal containers. I claim: _ 1. A container for an electrical condenser com prising an inner liquid-tight. thin sheet-metal casing, an outer casing of relatively thick sheet metal and a meltable compound interposed be tween the casings and ?lling any open spaces be tween them and substantially adhering to their 55 room for the connecting strips and leads, there- ' opposite faces. 2. An electrical condenser comprising an in by conserving space and oil. The ?xed spac ing provided by the condenser clamp permits ner liquid-tight thin sheet-metal casing holding small clearances with assurance that accidental the condenser elements therein, an outer cas contact of conductive parts with the walls will ing of relatively thicker sheet metal and slight ly larger than and surrounding the inner cas ing, and a wax-like compound partially or wholly ?lling the space between the two casings and not occur. a In assembling the condenser, the can I with the condenser and its clamptherein and with the terminals ailixed, is sealed \up except for two all holes such as II. The can is then ?lled ‘with hot oil (approximately 160° F.) through one of these holes, the air escaping through the other ner liquid-tight, thin sheet-metal casing holding the condenser elements therein, an ,outer are soldered over. . when the oil cools a slight casing of relatively thicker sheet metal and slightly larger than and surrounding the inner casing, and a compound su?iciently liquid to be vacuum is created thereby permitting subse quent expansion and contraction of the oil with ings and becoming solid at normal temperature out creating excessive pressure in the can and so as to constitute a unitary means for securely hole. The can is filled to within about Vath inch of the top and, while the oil is still hot, the holes eliminating the necessity for a breather open as. 75 constituting a unitary filler means. 3. An electrical condenser comprising an in ' In a double-walled container, as above de poured into said space between the two cas 70 positioning and protecting the inner thin metal casing. ' 4. An electrical condenser comprising a con-v 75 3, aiaassa denser body, a container for the condenser body formed of thin readily bendable metal having edge portions bent into tight-?tting engagement with adjacent portions of the container to form seams, sealing means continuously sealing all seams to provide a liquid-tight casing, said metal having suf?cient rigidity to provide a self-sup porting manipulable container unit; and an un sealed outer protective casing of relativelyrigid shock-resistant metal enveloping and closely ?t ting the container. 5. An electrical condenser comprising a con ' denser body, a container for the condenser body formed of thin readily bendable and solderable metal having edge portions crimped together to form seams, solder continuously sealing all seams of the container to provide a liquid-tight cas ing, said metal having sufficient rigidity to pro vide a self-supporting manipulable container unit; and an unsealed outer protective casing of relatively rigid shock-resistant metal enveloping and closely ?tting the container. 6. An electrical condenser comprising an her meticaliy sealed container formed of thin read ily bendable metal, a condenser body mounted in the container and completely supported there by, said metal having su?icient rigidity to pro vide, in combination with the condenser body mounted therein, a self-supporting ma'nipuiable 30 container unit; and an unsealed outer protective casing of relatively rigid shock-resistant metal enveloping and closely ?tting the container. 7. An electrical condenser comprising an her metically sealed container formed of thin read 35 ily bendable metal, a condenser body mounted in the container and completely supported there by,‘ said metal having sufficient rigidity to pro ~10 10. An electrical condenser comprising a con denser body, a container for the condenser body formed of thin readily bendable metal having 10 edge portions bent into tight-?tting engagement with adjacent portions of the container to form seams, sealing means continuously sealing all seams to provide a liquid-tight casing, said metal having sumcient rigidity to provide a self-sup porting manipulable container unit; an unsealed outer protective casing’ of relatively rigid metal enveloping and closely ?tting the container, and cushioning means arranged between the casing and the container in position to prevent move ment of the container in the casing, said means comprising yieldable material in extended con tact with the walls of the container body to dis tribute over a substantial area of the container impacts transmitted through the casing. 11. An electrical condenser comprising a con denser body, a container completely enclosing the body, and means for mounting the condenser body in the container, comprising ?at members engaging the top, bottom and opposite sides of 30 the condenser body and positioned in ?atwise' contact with the bottom and two opposite sides of the container, extending into engagement with the other opposite sides of the container at the bottom to maintain the condenser body 35 against movement within the container. 12. An electrical condenser comprising a con vide, in combination with the condenser body, a self-supporting manipulable container unit; an denser body comprised of a plurality of ?attened unsealed outer protective casing of relatively rigid shock-resistant metal enveloping and closely ?tting the container, and insulated terminals connected‘ to the condenser body and accessible from the exterior of the protective casing. frame for mounting the condenser body in the 40 container, said frame comprising members of 8. An electrical condenser comprising an her metically sealed container formed of thin rela tively ?exible metal, a condenser body mounted in the container, said metal having sumcient rigidity to provide, in combination with the con denser body, a self-supporting manipulable con-‘ tainer unit; and an outer protective casing of relatively rigid metal enveloping and closely ?t ting the container, the protective casing being formed of a plurality of sections joined at spaced points to provide an unsealed mechanically strong casing. ' 9. An electrical condenser comprising a con denser body, a container for the condenser body formed of thin readily bendable metal having 60 the container, and an end section adapted for connection to the body portion in position to cover the exposed end of the inner container after insertion thereof in the body portion, the outer casing sections being arranged to provide a mechanically strong unsealed casing for the container. edge portions bent into tight-?tting engagement with adjacent portions of the container to form seams, sealing means continuously sealing all seams to provide a liquid-tight casing, said metal having su?icient rigidity to provide a self-sup - porting manipulable container unit; and an outer protective casing of relatively rigid metal en veloping and closely ?tting the container, the protective casing comprising a body portion shaped to fit closely and substantially contain 70 uously over the sides and one end of the con~ tamer, arranged to permit endwlse insertion of condenser rolls, a container, and a clamping ‘ ?at material extending along the bottom, top and opposite sides of the condenser body and ?t ting flatwise against two opposite sides of the container over a substantial portion of the area thereof, arranged to provide a reinforcement for the container, the bottom of the frame being in extended ?atwise contact with the bottom of the container and arranged to provide a rein forcement therefor, said'bottom being provided - with upturned ends engaging the other sides of the container and arranged to ' maintain said sides in spaced relation to the ends of the con denser rolls. 13. An electrical condenser comprising a, con denser body, a container, and a clamping frame for mounting the body in the container, said frame comprising a U-shaped member of- sheet material extending along the bottom and oppo site sides of the condenser body and in substan 60 tially continuous ?atwise engagement with the juxtaposed sides of the container, 9. bottom mem ber of sheet material extending across the bot tom of the U-shaped member and having up turned ends engaging the other sides of the con 65 tainer in position to maintain the condenser body in spaced relation thereto, the bottom of the frame being in substantially continuous ?atwise engagment' with the bottom of the container. 70 wnmm ppm.