US1883932A - Electric condenser - Google Patents
Electric condenser Download PDFInfo
- Publication number
- US1883932A US1883932A US209175A US20917527A US1883932A US 1883932 A US1883932 A US 1883932A US 209175 A US209175 A US 209175A US 20917527 A US20917527 A US 20917527A US 1883932 A US1883932 A US 1883932A
- Authority
- US
- United States
- Prior art keywords
- coating
- condenser
- metal
- shellac
- insulating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000011248 coating agent Substances 0.000 description 22
- 238000000576 coating method Methods 0.000 description 22
- 239000002184 metal Substances 0.000 description 17
- ZLGIYFNHBLSMPS-ATJNOEHPSA-N shellac Chemical compound OCCCCCC(O)C(O)CCCCCCCC(O)=O.C1C23[C@H](C(O)=O)CCC2[C@](C)(CO)[C@@H]1C(C(O)=O)=C[C@@H]3O ZLGIYFNHBLSMPS-ATJNOEHPSA-N 0.000 description 11
- 229940113147 shellac Drugs 0.000 description 10
- 235000013874 shellac Nutrition 0.000 description 10
- 239000004208 shellac Substances 0.000 description 10
- 229920001800 Shellac Polymers 0.000 description 9
- 239000010410 layer Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 6
- 229920001342 Bakelite® Polymers 0.000 description 5
- 239000004637 bakelite Substances 0.000 description 5
- 239000011253 protective coating Substances 0.000 description 5
- 239000007859 condensation product Substances 0.000 description 4
- 239000011810 insulating material Substances 0.000 description 4
- 239000011247 coating layer Substances 0.000 description 3
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 3
- 239000011230 binding agent Substances 0.000 description 2
- 239000007888 film coating Substances 0.000 description 2
- 238000009501 film coating Methods 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 239000012777 electrically insulating material Substances 0.000 description 1
- SLGWESQGEUXWJQ-UHFFFAOYSA-N formaldehyde;phenol Chemical compound O=C.OC1=CC=CC=C1 SLGWESQGEUXWJQ-UHFFFAOYSA-N 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229920001568 phenolic resin Polymers 0.000 description 1
- 239000012260 resinous material Substances 0.000 description 1
- 239000012261 resinous substance Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/224—Housing; Encapsulation
Definitions
- a principal object of the invention is to provide a condenser of the above character with adurable, insulating, protective coatto the condenser and at the same time be impervious to moisture.
- the advantages of the above mentioned substances are combined and a durable, reliable, moisture-proof coating is secured by first coating the condenser with a solution of shellac and thereupon with a solution of a synthetic resin or phenolic condensation product such as bakelite.
- the protective coating of shellac which adheres well to the metal parts, is in turn protected, especially from moisture, by the layer or coating of bakelite or the like.
- the shellac forms a binder between the layer of bakelite or the like and the metal parts.
- One of the strips of metal foil is wound around and thereby connected with an inner metallic cylinder e, the lower disc I) being connected to the casing a.
- This casing is closed by an insulating disc 0 and the assembly thus formed is surrounded with a first coating layer 9 of shellac and a second protecting layer. h of artificial resin.
- the shellac is applied to the condenser in any manner desired, the simplest way being by immersion, particularly if the condenser is to be coated all over.
- the shellac may be applied in other ways,- with a brush, for example, particularly if it is only a question of providing the condenser with a protective coating in places.
- the coating of artificial resin or bakelite may be applied in the same manner. is dried by the application of heat.
- a condenser provided with a. protective 90 coating on its metal surfaces comprising athin coating of a non-brittle resinous electrically insulating material and a thin outer coating of a-phenolic condensation product on the protective coating.
- a condenser provided with a protective coating on its metal surfaces comprising a coating of shellac and an outer coating of a phenolic condensation product on the protec- 1 tive coating.
- a condenser' provided with a protective coating on its-metal surfaces comprising a coating of a non-brittle resinous electrically 7 insulating material adhering to the condenser material adhering to said first coating.
- a condenser having a metalsurface provided with an outer coating layer of moisture surface and the outer layer, and adhering to" to the outer coating and thereby forming a binder between the metal surface and layer, them.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Laminated Bodies (AREA)
Description
Oct. 25, 1932. A. KAZENMAIER ET AL ELECTRIC CONDENSER Filed July 28. 1927 10 ing which will cling tenaciously of the phenol-formaldehyde type,
, stances are Patented Oct. 25,1932
UNITED STATES PATENT OFFICE AUGUST KAZENMAIER AND WALTER DORN, OF STUTTGABT, GERMANY, ASSIGNOBS '20 ROBERT BOSCH .AKTIENGESELLSCEAFT, OF ST'UTTGART, GERMANY nnnc'rmc CONDENSER Application filed July 28,
5 conducting material and insulating or dielectric material.
A principal object of the invention is to provide a condenser of the above character with adurable, insulating, protective coatto the condenser and at the same time be impervious to moisture.-
Other objects of the invention will be apparent from the following description.
It is highly desirable to protect electric condensers of the above mentioned type with a coating of any of the many synthetic resins such, for as bakelite because such subhard and impervious to moisture. However, a coating of this material does not example,
adhere well to the metal surfaces of the conof its britso that densers and furthermore, because tleness, it is easily cracked or broken, such a coating is either start or becomes so after a short time.
It is also desirable to protect such condensers with a coating of shellac or similar gumlac or resinous substance because shellac adheres well to metal, is a good insulator and is comparatively elastic or non-brittle. However, a shel-lac coating of condensers is objectionable because it does not resist moisture.
According to the present invention the advantages of the above mentioned substances are combined and a durable, reliable, moisture-proof coating is secured by first coating the condenser with a solution of shellac and thereupon with a solution of a synthetic resin or phenolic condensation product such as bakelite. In this case, the protective coating of shellac, which adheres well to the metal parts, is in turn protected, especially from moisture, by the layer or coating of bakelite or the like. The shellac forms a binder between the layer of bakelite or the like and the metal parts. i
The accompanying drawing illustrates a condenser embodying our invention. The condenser-proper f defective from the cedure described above,
comprises two strips of.
1927, Serial No. 209,175, and in Germany August 28, 1926.
thin metal foil and two strips of insulating material rolled up into the form of a roll or cylinder. The four strips are arranged in the mannerwell known s9 that the strips of metal alternately are placed back from one edge of the insulating'strips and protrude over the other edge of said insulating strips. The protruding strips of metal are then pressed down against the ends of the rollto form metal layers or discs I) which are insulated from each other by the strips of insulating material. The condenser thus formed is inserted in a metallic-casing a, in which is inserted an insulating sleeve (1. One of the strips of metal foil is wound around and thereby connected with an inner metallic cylinder e, the lower disc I) being connected to the casing a. This casing is closed by an insulating disc 0 and the assembly thus formed is surrounded with a first coating layer 9 of shellac and a second protecting layer. h of artificial resin.
The shellac is applied to the condenser in any manner desired, the simplest way being by immersion, particularly if the condenser is to be coated all over. However, the shellac may be applied in other ways,- with a brush, for example, particularly if it is only a question of providing the condenser with a protective coating in places. The coating of artificial resin or bakelite may be applied in the same manner. is dried by the application of heat.
It is to be understood that the invention is not limited to the specific construction or probut that it includes all the modifications and adaptations which fall within the scope of the appended claims.
, \Vhat is claimed is:
1. A condenser provided with a. protective 90 coating on its metal surfaces comprising athin coating of a non-brittle resinous electrically insulating material and a thin outer coating of a-phenolic condensation product on the protective coating.
2. A condenser provided with a protective coating on its metal surfaces comprising a coating of shellac and an outer coating of a phenolic condensation product on the protec- 1 tive coating.
Thereupon the condenserbody Eroof material and a layer of insulating nonrittle resinous material between the metal 90 I 3. A condenser'provided with a protective coating on its-metal surfaces comprising a coating of a non-brittle resinous electrically 7 insulating material adhering to the condenser material adhering to said first coating.
4. Electrical apparatus having metal surfaces provided which clings tenaciously to the metal surfaces, said film coating comprisinga coating of a non=brittle I electrically insulating tenacious material placeddirectly on said metal surfaces and a film coating of a water-proof material placed directly on said-coating of non- .brittle material.
' 5. A condenser having a metalsurface provided with an outer coating layer of moisture surface and the outer layer, and adhering to" to the outer coating and thereby forming a binder between the metal surface and layer, them.
6; A condenser having ametal surface pros vided with an outer coating layer of a phenolic condensation product in between the metal-surface and adhering to both.
combination with an intermediate binding layer of shellac In testimony whereof we have hereunto aflixed our signatures. a
'AUGUST KAZENMAIER;
v WALTER DORN.
and an outer coating of a moisture-proof with a moisture-proof coating l and the outer layer,
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1883932X | 1926-08-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
US1883932A true US1883932A (en) | 1932-10-25 |
Family
ID=7747512
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US209175A Expired - Lifetime US1883932A (en) | 1926-08-28 | 1927-07-28 | Electric condenser |
Country Status (1)
Country | Link |
---|---|
US (1) | US1883932A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2486751A (en) * | 1945-06-22 | 1949-11-01 | Cook Electric Co | Relay coil assembly |
US2506446A (en) * | 1944-11-13 | 1950-05-02 | Dubilier Philip | Electrical condenser |
US2549309A (en) * | 1944-02-25 | 1951-04-17 | Westinghouse Electric Corp | Encapsulated member |
US2634314A (en) * | 1950-05-03 | 1953-04-07 | Sprague Electric Co | Sealed electrical assembly |
US3014167A (en) * | 1958-03-04 | 1961-12-19 | Bosch Gmbh Robert | High voltage condenser for impulse discharges |
EP0187595A2 (en) * | 1984-12-24 | 1986-07-16 | Sangamo Weston, Inc. | Protective coating for electrolytic capacitor |
-
1927
- 1927-07-28 US US209175A patent/US1883932A/en not_active Expired - Lifetime
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2549309A (en) * | 1944-02-25 | 1951-04-17 | Westinghouse Electric Corp | Encapsulated member |
US2506446A (en) * | 1944-11-13 | 1950-05-02 | Dubilier Philip | Electrical condenser |
US2486751A (en) * | 1945-06-22 | 1949-11-01 | Cook Electric Co | Relay coil assembly |
US2634314A (en) * | 1950-05-03 | 1953-04-07 | Sprague Electric Co | Sealed electrical assembly |
US3014167A (en) * | 1958-03-04 | 1961-12-19 | Bosch Gmbh Robert | High voltage condenser for impulse discharges |
EP0187595A2 (en) * | 1984-12-24 | 1986-07-16 | Sangamo Weston, Inc. | Protective coating for electrolytic capacitor |
EP0187595A3 (en) * | 1984-12-24 | 1987-09-30 | Sangamo Weston, Inc. | Protective coating for electrolytic capacitor |
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