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US3849708A - Capacitors - Google Patents

Capacitors Download PDF

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Publication number
US3849708A
US3849708A US00471717A US47171774A US3849708A US 3849708 A US3849708 A US 3849708A US 00471717 A US00471717 A US 00471717A US 47171774 A US47171774 A US 47171774A US 3849708 A US3849708 A US 3849708A
Authority
US
United States
Prior art keywords
conductive
roll
casing
terminal
capacitor
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
US00471717A
Other languages
English (en)
Inventor
P Leighton
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.)
Lucas Electrical Co Ltd
Original Assignee
Lucas Electrical Co Ltd
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 Lucas Electrical Co Ltd filed Critical Lucas Electrical Co Ltd
Application granted granted Critical
Publication of US3849708A publication Critical patent/US3849708A/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
    • H01G4/228—Terminals
    • H01G4/232—Terminals electrically connecting two or more layers of a stacked or rolled capacitor

Definitions

  • Each conductive element consists of a flexible, electrically insulating elastomer containing particles of conductive material which define conductive paths through the element.
  • One of the elements is positionedbetween said one end of the roll and the' casing to establish the electrical connection between one of the capacitor plates and the casing, and the other element is positioned between the other end of the roll and the terminal so establishing the electrical connection between the other capacitor plate and the terminal.
  • This invention relates to capacitors of the kind comprising a pair of capacitor plates each of which is defined by a conductive, flexible ribbon, the two plates 7 being. spaced apart by a flexible ribbon of dielectric material and the three ribbons being wound to define a roll with the edge of one of the conductive ribbons projecting at one axial end of the roll and the opposite edge of the conductive ribbon projecting at the other axial end of the roll, a conductive casing within which the roll is received electrically connected to the projecting edge of said one plate and a terminal electrically insulated from the casing, accessible at the exterior of the casing, and electrically connected to the projecting edge of the other plate.
  • the electrical connections between the plates of the capacitor roll and the casing and the termminal are made by way of metal washers which are secured to the terminal and the casing respectively and which each include a plurality of angularly spacedresili'ent fingers which engage the respective end of the roll.
  • the ends of the roll are each plated to in effect define a conductive end cap electrically connected to the respective capacitor plate.
  • the projecting edges of the two conductive ribbons each engage a face of a respective conductive element;
  • the conductive elements each consisting of a flexible, electrically insulating elastomer containing particles of conductive material which define conductive paths through the element, one of the elements being positioned between one end of said roll and the casing and so establishing the electrical connection between one of the capacitor plates and the casing, and the other element being positioned between the other end of the roll and said terminal and so establishing the electrical connection between the other capacitor plate and said terminal.
  • said elements are such that when the elements are in a relaxed state the particles of conductive material therein are held apart by the elastomer matrix, and are brought into contact with one another to establish the conductive paths through the element when the element is compressed beyond a predetermined amount, said one element being compressed beyond said predetermined amount between said one end of the roll and the casing, and the other element being compressed beyond said predetermined amount between the other end of the roll and said terminal.
  • the accompanying drawing is a cross-sectional view of a capacitor in accordance with one example of the constituting the plate 14 so that one edge of the plate 13 projects from one axial end of the roll and the opposite edge of the plate 14 projects from the other axial end of the roll.
  • the projectingportion of the plate 13 is spaced from the base 12 of the casing 11 by means of a disc-like element 15 of an electrically insulating elastomer which contains discrete particles of electrically conductive material which are brought into contact with one another to define conductive paths through the element when the element is compressed beyond a predetermined amount. ln the relaxed state of the element 15 the discrete conductive particles are held in spaced relationship by the matrix of the elastomer and so when relaxed the element 15 constitutes an insulating layer. However, when compressed the element 15 electrically connects the plate 13 with the casing 11. Received within the casing 11 and positioned between the outer surface of the roll and the inner surface of the casing 11 is a sleeve 16 of electrically insulating material.
  • the sleeve 16 is formed with a peripheral, radially inwardly extending flange 17.
  • the flange 17 de fines a central aperture, and received in the central aperture is an electrical terminal member 18.
  • the terminal member 18 includes a contact region projecting inwardly from the inner surface of the flange l7and includes a portion which extends from the casing and receives a conductive lead 19.
  • a second disc like element 21 of smaller diameter than the element 15, but otherwise identical, is positioned between the projecting parts of the capacitor plate 14 and the inner surface of the flange l7, and so engages the inwardly projecting contact region of the terminal 18.
  • the open end of the casing 11 is spun over to define an inwardly projecting flange 22 engaging the outer surface of the flange 17.
  • the flange 17 is biased towards the base 12 so that the element 15 is compressed bca tween the base 12 and the projecting parts of the plate 13, and the element 21 is compressed between the projecting parts of the plate 14 and the contact region of the terminal 18.
  • the element 15 and the element 21 are both rendered conductive and electrically connect respectively the plate 13 and the casing 11 and the plate 14 and the terminal 18, the terminal 18 being in sulated from the casing by the flange l7.
  • Physically and electrically connected to the base 12 is a mounting bracket 23 which defines the second external terminal of the capacitor.
  • the flange 17 tapers from a maximum at the flange 22 of the casing, and the maximum diameter of the flange 17 is such that the flange 17 is an interference fit within the casing 11.
  • a seal is produced between the flange 17 and the casing 11 preventing ingress of water between the casing 11 and the sleeve 16.
  • the terminal 18 is an interference fit within the aperture of the sleeve 17 so producing a seal preventing ingress of water between the terminal 18 and the flange 17.
  • the elements 15, 21 do not conduct until they are compressed. Thus in their relaxed state the elements 15, 21 are non-conductive. However, it is not essential that the elements 15, 21 are non-conductive in their relaxed state, and similar elements which are conductive even in their relayed state can be substituted if desired. As will be appreciated it is the amount of conductive particles which are included in the elastomer matrix which determine the amount of compression which must be applied to the element to achieve conduction. In an element having a low proportion of conductive particles high compression is called for to establish conduction, but in an element having a high proportion of conductive particles conduction may always be present even in the relaxed state of the element.
  • a roll capacitor comprising two conductive ribbons separated by a dielectric wherein the projecting edges of the two conductive ribbons each engage a face of a respective conductive element, the conductive elements each consisting of a flexible, electrically insulating elastomer containing particles of conductive material which deflne conductive paths through the element one of the elements being positioned between one end of said roll and the casing and so establishing the electrical connection between one of the capacitor plates and the casing, and the other element being positioned between the other end of the roll and said terminal and so establishing the electrical connection between the other capacitor plate and said terminal.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
  • Insulating Of Coils (AREA)
US00471717A 1973-05-18 1974-05-20 Capacitors Expired - Lifetime US3849708A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2396273 1973-05-18

Publications (1)

Publication Number Publication Date
US3849708A true US3849708A (en) 1974-11-19

Family

ID=10204188

Family Applications (1)

Application Number Title Priority Date Filing Date
US00471717A Expired - Lifetime US3849708A (en) 1973-05-18 1974-05-20 Capacitors

Country Status (6)

Country Link
US (1) US3849708A (es)
JP (1) JPS5018964A (es)
AU (1) AU6844174A (es)
DE (1) DE2423867A1 (es)
ES (1) ES203521Y (es)
FR (1) FR2230058A1 (es)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4252990A (en) * 1977-10-18 1981-02-24 Shinetsu Polymer Co Electronic circuit parts
US4578737A (en) * 1983-06-03 1986-03-25 Wolfgang Westermann Synthetic resin film wound capacitor
US4688322A (en) * 1986-02-06 1987-08-25 Sprague Electric Company Solid electrolyte chip capacitor method
US4691266A (en) * 1985-03-26 1987-09-01 Murata Manufacturing Co., Ltd. Electric doublelayer capacitor
US4819115A (en) * 1988-01-28 1989-04-04 Westinghouse Electric Corp. End connections for wound capacitors and methods of making the same
US6222720B1 (en) * 1997-12-22 2001-04-24 Asahi Glass Company Ltd. Electric double layer capacitor
US20150126051A1 (en) * 2013-11-01 2015-05-07 Quell Corporation Very low inductance flexible electrical connector insert
GB2536521A (en) * 2014-10-31 2016-09-21 Deere & Co Capacitor with improved heat dissipation
US20170040751A1 (en) * 2013-11-01 2017-02-09 Quell Corporation Hybrid Flexible Electrical Connector Insert
WO2018081087A1 (en) * 2016-10-25 2018-05-03 Quell Corporation Hybrid flexible electrical connector insert
US12407123B1 (en) 2020-11-23 2025-09-02 Quell Corporation Electrically dissipative flexible unitary connector insert

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5825028U (ja) * 1981-08-11 1983-02-17 三菱電機株式会社 コンデンサ装置
JPS61187100A (ja) * 1985-02-15 1986-08-20 日産自動車株式会社 車両用衝突防止装置
GB2186752A (en) * 1986-02-15 1987-08-19 Stc Plc Fuse for electronic component

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB584379A (en) * 1944-05-08 1947-01-14 Percy Archibald Sporing Improvements in or relating to tubular containers for electrical condensers or otherapparatus

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB584379A (en) * 1944-05-08 1947-01-14 Percy Archibald Sporing Improvements in or relating to tubular containers for electrical condensers or otherapparatus

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4252990A (en) * 1977-10-18 1981-02-24 Shinetsu Polymer Co Electronic circuit parts
US4578737A (en) * 1983-06-03 1986-03-25 Wolfgang Westermann Synthetic resin film wound capacitor
US4691266A (en) * 1985-03-26 1987-09-01 Murata Manufacturing Co., Ltd. Electric doublelayer capacitor
US4688322A (en) * 1986-02-06 1987-08-25 Sprague Electric Company Solid electrolyte chip capacitor method
US4819115A (en) * 1988-01-28 1989-04-04 Westinghouse Electric Corp. End connections for wound capacitors and methods of making the same
US6222720B1 (en) * 1997-12-22 2001-04-24 Asahi Glass Company Ltd. Electric double layer capacitor
EP0924723A3 (en) * 1997-12-22 2004-02-11 Asahi Glass Company Ltd. Electric double layer capacitor
US9692188B2 (en) * 2013-11-01 2017-06-27 Quell Corporation Flexible electrical connector insert with conductive and non-conductive elastomers
US20150126051A1 (en) * 2013-11-01 2015-05-07 Quell Corporation Very low inductance flexible electrical connector insert
US9478887B2 (en) * 2013-11-01 2016-10-25 Quell Corporation Flexible electrical connector insert with conductive and non-conductive elastomers
US20170040751A1 (en) * 2013-11-01 2017-02-09 Quell Corporation Hybrid Flexible Electrical Connector Insert
GB2536521A (en) * 2014-10-31 2016-09-21 Deere & Co Capacitor with improved heat dissipation
US9831035B2 (en) 2014-10-31 2017-11-28 Deere & Company Capacitor with improved heat dissipation
GB2536521B (en) * 2014-10-31 2019-06-19 Deere & Co Capacitor with improved heat dissipation
US10418177B2 (en) 2014-10-31 2019-09-17 Deere & Company Capacitor with improved heat dissipation
WO2018081087A1 (en) * 2016-10-25 2018-05-03 Quell Corporation Hybrid flexible electrical connector insert
GB2570838A (en) * 2016-10-25 2019-08-07 Quell Corp Hybrid flexible electrical connector insert
GB2570838B (en) * 2016-10-25 2020-08-12 Quell Corp Hybrid flexible electrical connector insert
US12407123B1 (en) 2020-11-23 2025-09-02 Quell Corporation Electrically dissipative flexible unitary connector insert

Also Published As

Publication number Publication date
AU6844174A (en) 1975-11-06
JPS5018964A (es) 1975-02-27
ES203521U (es) 1976-01-01
DE2423867A1 (de) 1974-12-05
FR2230058A1 (es) 1974-12-13
ES203521Y (es) 1976-05-01

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