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US1694276A - Electrical condenser - Google Patents

Electrical condenser Download PDF

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Publication number
US1694276A
US1694276A US181284A US18128427A US1694276A US 1694276 A US1694276 A US 1694276A US 181284 A US181284 A US 181284A US 18128427 A US18128427 A US 18128427A US 1694276 A US1694276 A US 1694276A
Authority
US
United States
Prior art keywords
electrical condenser
dielectric
condensers
wax
soap
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
Application number
US181284A
Inventor
Mohrle Arthur
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch AG
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Application granted granted Critical
Publication of US1694276A publication Critical patent/US1694276A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01G4/258—Temperature compensation means
    • 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
    • H01G4/018—Dielectrics
    • H01G4/20—Dielectrics using combinations of dielectrics from more than one of groups H01G4/02 - H01G4/06
    • H01G4/22—Dielectrics using combinations of dielectrics from more than one of groups H01G4/02 - H01G4/06 impregnated
    • H01G4/221—Dielectrics using combinations of dielectrics from more than one of groups H01G4/02 - H01G4/06 impregnated characterised by the composition of the impregnant

Definitions

  • This invention relates to condensers which use paper or a similar fibrous material as a dielectric between the several plates of the conductive material.
  • the dielectric heretofore had been soaked with oil, paraffin or naphthalene.
  • the melting pointof suchsoaking agents is not sufficiently high in order to render the condensers sufiiciently insensitive against higher temperatures which arise'in the operation of ignition devices for combustion engines.
  • naphthalene melts at a temperature of 80 0.
  • paraffin melts as early as at a temperature of from 38 to 56 C. according to its specific condition.
  • My invention is designed to improve the condenser in this respect, so that the same will be more suitable for the requirements 10 of the practice.
  • the dielectric is treated with a soaking agent which consists essentially of a soapof wax which is insoluble in water.
  • the original -material from which this soaking mass is made may consist of so-called Montan wax or also bees wax.
  • the saponification of the material may for instance be accomplishedby treating the sa'me'with barium, calcium, magnesium or the like.
  • Tests which have been made by the inventor have shown that lime-soap of purifiedMontan wax is especially advantageous for these purposes, the melting point .of said lime-soap being at 93 C. and the point at which the mass be comes liquid being even as high as at 105 35 G.
  • such a lime-soap of Montan wax can be made by soaping about 98 parts of Montan wax with about 2 parts of calcium oxide.
  • the dielectric constant of the fibrous ma- 0 terial which is soaked with said mass is esscntially equal to that obtained by soaking with paraffin.
  • Condensers having a dielectric of this kind are possessed of a high capacity which remains constant during all variations of temperature arising in the practical application.
  • the dielectric furthermore will have no hygroscopic properties whatever, so that the condensers made according to my invention inmost cases do not need. to be provided with especially tightened casings or the like.
  • An electrical condenser having a dielectrio which consists of fibrous material. said material being soaked essentially with a mass consisting of lime soap of purified Montan wax.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Paper (AREA)

Description

Patented Dec. 4, 1928.
UNITED STATES.
PATENT OFFICE.
ARTHUR MHRLE, OF STU'ITGART, GERMANY, ASSIGNOR TO ROBERT BOSCH AKTIEN- GESELLSCHAIT, F STUTTGART, GERMANY.
ELECTRICAL coiIDENsnR.
Io Drawing. Application filed April 5, 1927, Serial No. 181,284, and in Germany April 21, 1926.
This invention relates to condensers which use paper or a similar fibrous material as a dielectric between the several plates of the conductive material. In order to improve such condensers, the dielectric heretofore had been soaked with oil, paraffin or naphthalene. The melting pointof suchsoaking agents, however is not sufficiently high in order to render the condensers sufiiciently insensitive against higher temperatures which arise'in the operation of ignition devices for combustion engines. It is noted that naphthalene melts at a temperature of 80 0., while paraffin melts as early as at a temperature of from 38 to 56 C. according to its specific condition.
My invention is designed to improve the condenser in this respect, so that the same will be more suitable for the requirements 10 of the practice. For this purpose the dielectric is treated with a soaking agent which consists essentially of a soapof wax which is insoluble in water. The original -material from which this soaking mass is made may consist of so-called Montan wax or also bees wax. The saponification of the material may for instance be accomplishedby treating the sa'me'with barium, calcium, magnesium or the like. Tests which have been made by the inventor have shown that lime-soap of purifiedMontan wax is especially advantageous for these purposes, the melting point .of said lime-soap being at 93 C. and the point at which the mass be comes liquid being even as high as at 105 35 G. In one typical example, such a lime-soap of Montan wax can be made by soaping about 98 parts of Montan wax with about 2 parts of calcium oxide.
The dielectric constant of the fibrous ma- 0 terial which is soaked with said mass is esscntially equal to that obtained by soaking with paraffin. Condensers having a dielectric of this kind are possessed of a high capacity which remains constant during all variations of temperature arising in the practical application. The dielectric furthermore will have no hygroscopic properties whatever, so that the condensers made according to my invention inmost cases do not need. to be provided with especially tightened casings or the like.
I claim:
An electrical condenser having a dielectrio which consists of fibrous material. said material being soaked essentially with a mass consisting of lime soap of purified Montan wax.
In testimony whereof I have hereunto affixed my signature.
ARTHUR MoHRLE.
US181284A 1926-04-21 1927-04-05 Electrical condenser Expired - Lifetime US1694276A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1694276X 1926-04-21

Publications (1)

Publication Number Publication Date
US1694276A true US1694276A (en) 1928-12-04

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Family Applications (1)

Application Number Title Priority Date Filing Date
US181284A Expired - Lifetime US1694276A (en) 1926-04-21 1927-04-05 Electrical condenser

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2480352A (en) * 1944-11-04 1949-08-30 Warren S D Co Separable liner for tacky elastomers
US2756165A (en) * 1950-09-15 1956-07-24 Dean A Lyon Electrically conducting films and process for forming the same
US3175927A (en) * 1961-10-25 1965-03-30 Gen Electric Reconstituted micaceous products

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2480352A (en) * 1944-11-04 1949-08-30 Warren S D Co Separable liner for tacky elastomers
US2756165A (en) * 1950-09-15 1956-07-24 Dean A Lyon Electrically conducting films and process for forming the same
US3175927A (en) * 1961-10-25 1965-03-30 Gen Electric Reconstituted micaceous products

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