US3604864A - Point contact mounting for ignition distributors - Google Patents

Point contact mounting for ignition distributors Download PDF

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Publication number
US3604864A
US3604864A US12396A US3604864DA US3604864A US 3604864 A US3604864 A US 3604864A US 12396 A US12396 A US 12396A US 3604864D A US3604864D A US 3604864DA US 3604864 A US3604864 A US 3604864A
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US
United States
Prior art keywords
breaker arm
breaker
cam
ignition
contacts
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
US12396A
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English (en)
Inventor
Roger Jean Habert
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.)
Ducellier et Cie
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Ducellier et Cie
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Filing date
Publication date
Application filed by Ducellier et Cie filed Critical Ducellier et Cie
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P5/00—Advancing or retarding ignition; Control therefor
    • F02P5/04—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions
    • F02P5/05—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using mechanical means
    • F02P5/10—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using mechanical means dependent on fluid pressure in engine, e.g. combustion-air pressure
    • F02P5/103—Advancing or retarding ignition; Control therefor automatically, as a function of the working conditions of the engine or vehicle or of the atmospheric conditions using mechanical means dependent on fluid pressure in engine, e.g. combustion-air pressure dependent on the combustion-air pressure in engine
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02P—IGNITION, OTHER THAN COMPRESSION IGNITION, FOR INTERNAL-COMBUSTION ENGINES; TESTING OF IGNITION TIMING IN COMPRESSION-IGNITION ENGINES
    • F02P7/00—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices
    • F02P7/06—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices of circuit-makers or -breakers, or pick-up devices adapted to sense particular points of the timing cycle
    • F02P7/063—Mechanical pick-up devices, circuit-makers or -breakers, e.g. contact-breakers

Definitions

  • PATENTEDSEPMISYI 3504354 sum 1 or 2 FIG] INVENTOR ROGER HABERT BY 341 1 Si nmaucvs PATENIEUSEPWQH 3,604 864 saw 2 [If 2 INVENTOR ROGER HABERT BY 9m #5114? ATTORNEYS POINT CONTACT MOUNTING FOR IGNITION DISTRIBUTORS BACKGROU ND OF THE INVENTION
  • a fixed ignition point contact is associated with a breaker arm carrying a further contact and the breaker arm is pivoted on a shaft so that make and break of the contacts is established by engagement between the rubbing block on the breaker arm and the dis tributor cam.
  • the present invention is directed to an arrangement so as to obtain a wiping action between the fixed and movable contacts of ignition point contact arrangement which is not restricted to use in conjunction with a vacuum advance distributor and therefore may be used with any desired type of distributor.
  • the present invention involves the utilization of a breaker arm mounted on a pivot shaft therefor and which is axially shiftable on such pivot shaft so as to effect relative wiping action between the fixed and movable contacts of the ignition point system.
  • the axial shifting of the breaker arm is effected by a desired mechanism which will periodically effect such shifting and, conveniently, the actuating mechanism may take the form of an actuator such as a bellows or diaphragm controlled by the negative pressure in the intake manifold of an internal combustion engine and suitably linked to mechanism for effecting the axial shifting or the breaker arm as aforesaid.
  • the pivot shaft for the breaker arm may be inclined with respect to the rotor shaft and the cam lobes conventionally formed, i.e., parallel to the axis of the rotor shaft whereby axial shifting of the contact breaker arm on the pivot shaft which is inclined as aforesaid will effect requisite advance-retard characteristics.
  • FIG. 1 is a plan view showing the breaker plate and cam of an ignition distributor and illustrating the ignition points and the mechanism for shifting the breaker arm according to the present invention
  • FIG. 2 is a vertical section taken substantially along the plane of section 22 in FIG. I;
  • FIG. 3 is a view similar to Figure 2 but showing a modified form of the invention
  • FIG. 4 is a view similar to FIGS. 3 and 2 but showing a still further modified form of the invention
  • FIG. 5 is a partial view illustrating a form of the invention similar to that shown in FIGS. I and 2 but with modified form of distributor cam so that advance-retard characteristics are also obtained;
  • FIG. 6 is a view similar to FIG. 5 but showing further modification for effecting advance-retard characteristics.
  • reference character II indicates the conventional breaker plate of an ignition distributor which mounts, in usual fashion, a fixed contact point 2 cooperable with a movable contact point 3 carried on the breaker arm 4 having an insulated boss portion pivotally received on the shaft 8 which, as is shown in FIG. 2, is suitably anchored to the breaker plate 1.
  • the breaker arm 4 is provided with a leaf spring 5 abutting the insulator piece 5' normally to urge the breaker arm 4 to pivot about the shaft 8 such that the contact 3 is urged toward the contact 2, it also being understood that as is conventional, the leaf spring 5 may also serve as a means for establishing electrical connection to the movable contact 3.
  • the breaker arm 4 carries a rubbing block 6 which is adapted to be selectively engaged by the lobes of the cam 7 to make and break the contacts 2,3 in entirely conventional fashion.
  • the entire breaker plate is rotatable about the axis of the rotor shaft to which the cam 7 is affixed and a diaphragm actuator mounted on the housing of the distributor is provided with a suitable link or rod connected to the breaker plate for rotating the breaker plate with respect to the rotor shaft to effect the ignition advance-retard characteristics as is well known in the art.
  • the breaker plate 1 is fixed and the cam 7 may be actuated to impart the desired advance-retard characteristics by a conventional centrifugal mechanism.
  • the insulated hub of the breaker arm 4 is of an axial length substantially less than the pivot shaft 8 therefor and a suitable removable washer member 8' is fixed to the free end of the pivot shaft 8 and provided a seat for a compression spring 9 received in and seating within a recess in the corresponding end of the breaker arm boss.
  • the opposite end of the breaker arm boss bears against an insulated bushing 10 having a reduced diameter portion 10a and diametrically opposed protrusions 10b.
  • the breaker plate is provided with upstand ing tabs I3 and 14 mounting therebetween a pivot shaft 12 upon which a bellcrank I1 is pivotally received, one arm of the bellcrank ll being bifurcated as indicated by the reference characters Ila to straddle the reduced diameter portion [0a of the bushing I0 and upon which the protuberances or protrusions 10!; bear under the action of the compression spring 9.
  • the other end III; of the bellcrank II is fixed to a stub shaft 11 which is provided with a transverse bore receiving and anchoring to the inner end of a link 15.
  • a U-shaped sheet metal or like toothed cam member 17 is disposed as shown and the teeth thereon as is illustrated in FIG.
  • the link I5 In response to increasing negative pressure in the intake manifold of the internal combustion engine, the link I5 is moved in the direction of the arrow F in FIGS. I and 2 whereby to rock the bellcrank II about its pivot 12 and thus cause axial shifting of the breaker arm 4 along the shaft 8 in opposition to the compression spring 9.
  • the compression spring 9 of course returns the breaker arm to the FIG. 2 position when the intake manifold pressure is at ambient atmospheric pressure.
  • FIG. 4 illustrates a pair of breaker arms 4 and 4' which are bridged by an actuator plate extending between the hub portions of the breaker arms 4 and 4' which are received on the pivot shafts 8 and 8'.
  • the bellcrank 11 is provided with a finger portion lla engaging the plate 20 so as to shift the breaker arm in unison along their shafts 8 and 8' in the direction of the arrow of FIG. 4.
  • FIG. 5 shows somewhat diagrammatically a further embodiment of the invention which in this case, achieves not only the aforementioned relative wiping or rubbing action between the fixed and movable contacts, but also effects advance-retard characteristics as the breaker arm is axially shifted along its pivot shaft.
  • the lobes 21a of the distributor cam 21' are helically extending as indicated and the rubbing block 22 of the associated breaker arm 4" is correspondingly angled as illustrated.
  • the bellcrank associated with the breaker arm 4" which may be identical with the FIGS.
  • the same effect may be achieved by inclining the pivot shaft 23 for the breaker arms 4" and 4"" as shown in FIG. 6 with respect to the axis of the rotor shaft, the distributor cam 24, in this case, having its cam lobes extending parallel to the axis of the shaft S in conventional fashion.
  • the actuating mechanism in imparting motion to the breaker arms in the direction of the arrow F in FIG. 6 also cause the rubbing blocks 25 of the breaker arms to shift in the direction of the arrow F, relatively to the cam and thereby advance the make and break relationship between the fixed and closed contacts of the ignition distributor points.
  • a fixed ignition point contact carried by said breaker plate, a breaker pivot shaft on said breaker plate, a breaker arm pivotally mounted on said pivot shaft having a contact remote therefrom for make and break engage ment with said fixed contact and having a rubbing block engageable by said cam, and means for shifting said breaker arm axially of said pivot shaft to cause relative movement between said fixed contact and said breaker arm contact for cleaning the contacts and for varying the ignition timing as a function of the vacuum as responsive to a function of the engine load.
  • said pivot shaft is parallel with said rotor shaft.
  • An ignition distributor comprising a rotatable cam
  • said breaker arm being pivotally mounted remote from said fixed contact and having a contact engaging said fixed contact, said breaker arm also including a rubbing block engageable by said cam for pivoting said breaker arm in a predetermined plane away from said fixed contact, and

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Transmission Devices (AREA)
US12396A 1969-02-24 1970-02-18 Point contact mounting for ignition distributors Expired - Lifetime US3604864A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR6904662A FR2032245A5 (fr) 1969-02-24 1969-02-24

Publications (1)

Publication Number Publication Date
US3604864A true US3604864A (en) 1971-09-14

Family

ID=9029510

Family Applications (1)

Application Number Title Priority Date Filing Date
US12396A Expired - Lifetime US3604864A (en) 1969-02-24 1970-02-18 Point contact mounting for ignition distributors

Country Status (7)

Country Link
US (1) US3604864A (fr)
BE (1) BE744682A (fr)
DE (1) DE2008629C3 (fr)
ES (1) ES376822A1 (fr)
FR (1) FR2032245A5 (fr)
GB (1) GB1281124A (fr)
NL (1) NL7001806A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4119817A (en) * 1976-09-07 1978-10-10 Orr William J Breaker point assembly
US4121064A (en) * 1976-03-11 1978-10-17 Nissan Motor Company, Limited Ignition distributor having independent ignition system breaker arm contacts simultaneously engaging common conductive post

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2123791A5 (fr) * 1971-02-01 1972-09-15 Ducellier & Cie
DE2453465C3 (de) * 1974-11-12 1981-10-15 Robert Bosch Gmbh, 7000 Stuttgart Zündunterbrecher für Otto-Motoren
ZA78236B (en) * 1977-01-26 1978-12-27 Lucas Industries Ltd Contact breaker assembly

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2096294A (en) * 1934-11-15 1937-10-19 Thomas W Bryant Automatic ignition timer for internal combustion motors
US2096158A (en) * 1935-12-19 1937-10-19 Thomas W Bryant Automatic ignition controller for internal combustion engines
US2688054A (en) * 1948-10-16 1954-08-31 American Bosch Corp Ignition control device
US2854534A (en) * 1956-11-23 1958-09-30 John P Beauclair Distributor for ignition system
US3009027A (en) * 1959-11-18 1961-11-14 Magneti Marelli Spa Advance control

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2096294A (en) * 1934-11-15 1937-10-19 Thomas W Bryant Automatic ignition timer for internal combustion motors
US2096158A (en) * 1935-12-19 1937-10-19 Thomas W Bryant Automatic ignition controller for internal combustion engines
US2688054A (en) * 1948-10-16 1954-08-31 American Bosch Corp Ignition control device
US2854534A (en) * 1956-11-23 1958-09-30 John P Beauclair Distributor for ignition system
US3009027A (en) * 1959-11-18 1961-11-14 Magneti Marelli Spa Advance control

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4121064A (en) * 1976-03-11 1978-10-17 Nissan Motor Company, Limited Ignition distributor having independent ignition system breaker arm contacts simultaneously engaging common conductive post
US4119817A (en) * 1976-09-07 1978-10-10 Orr William J Breaker point assembly

Also Published As

Publication number Publication date
DE2008629B2 (de) 1979-05-03
FR2032245A5 (fr) 1970-11-20
NL7001806A (fr) 1970-08-26
DE2008629C3 (de) 1979-12-20
DE2008629A1 (de) 1970-09-03
ES376822A1 (es) 1972-05-01
GB1281124A (en) 1972-07-12
BE744682A (fr) 1970-07-01

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