US3437966A - Ignition coils - Google Patents

Ignition coils Download PDF

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Publication number
US3437966A
US3437966A US652894A US3437966DA US3437966A US 3437966 A US3437966 A US 3437966A US 652894 A US652894 A US 652894A US 3437966D A US3437966D A US 3437966DA US 3437966 A US3437966 A US 3437966A
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US
United States
Prior art keywords
coil
core
laminae
cap
terminal
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
US652894A
Inventor
Leslie Tolley
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.)
ZF International UK Ltd
Original Assignee
Lucas Industries 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 Industries Ltd filed Critical Lucas Industries Ltd
Application granted granted Critical
Publication of US3437966A publication Critical patent/US3437966A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/12—Ignition, e.g. for IC engines
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/12—Ignition, e.g. for IC engines
    • H01F2038/125—Ignition, e.g. for IC engines with oil insulation

Definitions

  • This invention relates to ignition cOils of the kind including a hollow casing, closed by an insulating cap, a core extending axially within the casing and comprising a plurality of axially extending laminae and a high tension terminal carried by the insulating cap.
  • one of said laminae extends from the core and is shaped to define a compression spring, the Spring engaging a part associated with said terminal and serving electrically to interconnect said core and said terminal.
  • the coil includes a hollow casing 11 closed by a truncated conical cap 12 of insulating material.
  • a core 14 consisting of a plurality of laminae 1'5.
  • a former 16 Surrounding the core is a former 16 on which are wound the primary and secondary windings 17 of the coil.
  • One of the laminae extends from the core 14 and is bent into contact with the upper end of the core, the remainder of the extending portion of laminae being deformed to constitute an axially extending compression spring 18.
  • the cap 12 is formed with a stepped axial bore 19 the narrower part of which is closed by a conductive screw 21 the head 22 of which extends into the wider part of the bore 19 and constitutes the high tension terminal of the ignition coil.
  • the shank of the screw 21 extends through the cap 12 and into contact with the spring 18 thereby electrically interconnecting the high tension terice minal and the core 14 and urging the core 14 through the intermediary of the spring 18, into engagement with the support 13.
  • the cap 12 also serves to support the other two terminals of the coil, one of which is connected within the coil to one end of both the primary and secondary windings of the coil and is in use electrically connected through a contact breaker to earth, and the other of which is connected within the coil to the other end of the primary winding of the coil and is in use connected to a DC. source, the other end of the secondary winding of the coil being connected to the high tension terminal of the coil through the core and the spring 18.
  • a rubber sealing ring 23 is trapped between the head 22 of the screw 21 and the stepped portion of the bore 119 to prevent leakage of oil through the bore 19.
  • An ignition coil comprising in combination a hollow casing, an insulating cap closing said casing, a core extending axially within said casing and comprising a plurality of axially extending laminae, a coil surrounding said core, a high tension terminal carried by said insulating cap, one of the laminae having an integral extension at its end adjacent said insulating cap, said integral extension being bent to define a pair of flat parallel portions integrally connected so as to define a compression spring, one of said flat portions extending along the top edges of said laminae, and the other of said fiat portions engaging a part associated with said terminal and serving electrically to interconnect Said core and said terminal.
  • An ignition coil as claimed in claim 2 wherein the screw extends through a bore in said insulating cap, there being a resilient sealing member trapped between the head of the screw and the periphery of said bore to prevent leakage of oil from the casing through said bore where the ignition coil is filled with oil.

Description

April '8, 1969 r .L. TOLLEY I 7,
' I IGNITION corps I Filed July 12, l967 v I Z2 I I s- E L\ i I l5 I H United States Patent 3,437,966 I IGNITION COILS Leslie Tolley, Great Barr, Birmingham, England, assignor to Joseph Lucas (Industries) Limited, Birmingham, England Filed July 12, 1967, Ser. No. 652,894 Claims priority, application Great Britain, Aug. 8, 1966, 35,380/ 66 Int. Cl. H01f 27/04 US. Cl. 336-90 3 Claims ABSTRACT OF THE DISCLOSURE This invention relates to ignition cOils of the kind including a hollow casing, closed by an insulating cap, a core extending axially within the casing and comprising a plurality of axially extending laminae and a high tension terminal carried by the insulating cap.
According to the invention in a coil of the kind specified one of said laminae extends from the core and is shaped to define a compression spring, the Spring engaging a part associated with said terminal and serving electrically to interconnect said core and said terminal.
The accompanying cross-sectional view of an ignition coil illustrates one example of the invention.
Referring to the drawing the coil includes a hollow casing 11 closed by a truncated conical cap 12 of insulating material. Supported within the casing 11 and extending axially between the cap 12 and an insulating support 13 is a core 14 consisting of a plurality of laminae 1'5. Surrounding the core is a former 16 on which are wound the primary and secondary windings 17 of the coil.
One of the laminae extends from the core 14 and is bent into contact with the upper end of the core, the remainder of the extending portion of laminae being deformed to constitute an axially extending compression spring 18.
The cap 12 is formed with a stepped axial bore 19 the narrower part of which is closed by a conductive screw 21 the head 22 of which extends into the wider part of the bore 19 and constitutes the high tension terminal of the ignition coil. The shank of the screw 21 extends through the cap 12 and into contact with the spring 18 thereby electrically interconnecting the high tension terice minal and the core 14 and urging the core 14 through the intermediary of the spring 18, into engagement with the support 13. The cap 12 also serves to support the other two terminals of the coil, one of which is connected within the coil to one end of both the primary and secondary windings of the coil and is in use electrically connected through a contact breaker to earth, and the other of which is connected within the coil to the other end of the primary winding of the coil and is in use connected to a DC. source, the other end of the secondary winding of the coil being connected to the high tension terminal of the coil through the core and the spring 18.
Where the coil is oil filled, a rubber sealing ring 23 is trapped between the head 22 of the screw 21 and the stepped portion of the bore 119 to prevent leakage of oil through the bore 19.
Having thus described my invention What I claim as new and desire to secure by Letters Patent is:
1. An ignition coil comprising in combination a hollow casing, an insulating cap closing said casing, a core extending axially within said casing and comprising a plurality of axially extending laminae, a coil surrounding said core, a high tension terminal carried by said insulating cap, one of the laminae having an integral extension at its end adjacent said insulating cap, said integral extension being bent to define a pair of flat parallel portions integrally connected so as to define a compression spring, one of said flat portions extending along the top edges of said laminae, and the other of said fiat portions engaging a part associated with said terminal and serving electrically to interconnect Said core and said terminal.
2. An ignition coil as claimed in claim 1 wherein said high tension terminal is constituted by the head of a conductive screw and said part associated with the terminal is constituted by the shank of the screw.
3. An ignition coil as claimed in claim 2 wherein the screw extends through a bore in said insulating cap, there being a resilient sealing member trapped between the head of the screw and the periphery of said bore to prevent leakage of oil from the casing through said bore where the ignition coil is filled with oil.
References Cited UNITED STATES PATENTS LEWIS H. MYERS,
THOMAS J. KOZMA, Assistant Examiner.
Primary Examiner.
US. Cl. X.R. 336-92, 192
US652894A 1966-08-08 1967-07-12 Ignition coils Expired - Lifetime US3437966A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB35380/66A GB1184433A (en) 1966-08-08 1966-08-08 Ignition Coils

Publications (1)

Publication Number Publication Date
US3437966A true US3437966A (en) 1969-04-08

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Family Applications (1)

Application Number Title Priority Date Filing Date
US652894A Expired - Lifetime US3437966A (en) 1966-08-08 1967-07-12 Ignition coils

Country Status (4)

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US (1) US3437966A (en)
BR (1) BR6791430D0 (en)
DE (1) DE1539233A1 (en)
GB (1) GB1184433A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4132969A (en) * 1976-06-08 1979-01-02 Lucas Industries Limited Ignition coils
US4232284A (en) * 1979-05-07 1980-11-04 Power Parts, Inc. Ignition coil and electrical connector therefor
US6163949A (en) * 1996-06-05 2000-12-26 L.H. Carbide Corporation Method for manufacturing long, slender lamina stack from nonuniform laminae
US6195875B1 (en) 1996-06-05 2001-03-06 L.H. Carbide Corporation Apparatus for manufacturing long, slender lamina stacks from nonuniform laminae
US6636137B1 (en) 1996-06-05 2003-10-21 L.H. Carbide Corporation Ignition coil assembly
US20110057757A1 (en) * 2009-09-08 2011-03-10 Delphi Technologies, Inc. Ignition coil for vehicle

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1173526A (en) * 1980-09-24 1984-08-28 Nippondenso Co., Ltd. Ignition coil for internal combustion engines
DE3205714A1 (en) * 1982-02-18 1983-08-25 Robert Bosch Gmbh, 7000 Stuttgart IGNITION SYSTEM FOR INTERNAL COMBUSTION ENGINES

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1998378A (en) * 1933-08-05 1935-04-16 Mallory Res Co Ignition coil
US2081979A (en) * 1934-08-28 1937-06-01 Rca Corp Ignition coil system
US2416148A (en) * 1944-05-27 1947-02-18 Int Harvester Co Ignition coil
US2762019A (en) * 1951-02-16 1956-09-04 Gen Motors Corp Ignition coil

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1998378A (en) * 1933-08-05 1935-04-16 Mallory Res Co Ignition coil
US2081979A (en) * 1934-08-28 1937-06-01 Rca Corp Ignition coil system
US2416148A (en) * 1944-05-27 1947-02-18 Int Harvester Co Ignition coil
US2762019A (en) * 1951-02-16 1956-09-04 Gen Motors Corp Ignition coil

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4132969A (en) * 1976-06-08 1979-01-02 Lucas Industries Limited Ignition coils
US4232284A (en) * 1979-05-07 1980-11-04 Power Parts, Inc. Ignition coil and electrical connector therefor
US6163949A (en) * 1996-06-05 2000-12-26 L.H. Carbide Corporation Method for manufacturing long, slender lamina stack from nonuniform laminae
US6195875B1 (en) 1996-06-05 2001-03-06 L.H. Carbide Corporation Apparatus for manufacturing long, slender lamina stacks from nonuniform laminae
US6636137B1 (en) 1996-06-05 2003-10-21 L.H. Carbide Corporation Ignition coil assembly
US6745458B2 (en) 1996-06-05 2004-06-08 L.H. Carbide Corporation Laminated magnetic core and method for making
US20110057757A1 (en) * 2009-09-08 2011-03-10 Delphi Technologies, Inc. Ignition coil for vehicle
US8026783B2 (en) * 2009-09-08 2011-09-27 Delphi Technologies, Inc. Ignition coil for vehicle

Also Published As

Publication number Publication date
BR6791430D0 (en) 1973-01-02
GB1184433A (en) 1970-03-18
DE1539233A1 (en) 1970-07-23

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