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US3723691A - An ignition distributor base plate having integral resilient securing means - Google Patents

An ignition distributor base plate having integral resilient securing means Download PDF

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Publication number
US3723691A
US3723691A US00165183A US3723691DA US3723691A US 3723691 A US3723691 A US 3723691A US 00165183 A US00165183 A US 00165183A US 3723691D A US3723691D A US 3723691DA US 3723691 A US3723691 A US 3723691A
Authority
US
United States
Prior art keywords
base plate
distributor
casing
slot
ear
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
US00165183A
Other languages
English (en)
Inventor
A Rees
P Barr
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 US3723691A publication Critical patent/US3723691A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F02P7/02—Arrangements of distributors, circuit-makers or -breakers, e.g. of distributor and circuit-breaker combinations or pick-up devices of distributors
    • F02P7/021—Mechanical distributors

Definitions

  • the base plate is formed with a slot which extends along a chord of the plate to define a resilient ear integralwith the plate.
  • a tapered screw, or other alternative expansion means is engaged in the slot, and urges the resilient ear in a direction away from the remainder of the base plate so as to urge the ear into the groove, and so clamp the base plate in position in the casing.
  • FIG. 1 A first figure.
  • one of said chamfered portions projects from the periphery of the plate.
  • said clamping means comprises a tapered screw extending through said slot and engaged therein.
  • said slot is provided with a part-circular portion intermediate the ends of the slot and said tapered screw is engaged in said part-circular portion.
  • FIG. 1 is a sectional view of the casing of an ignition distributor
  • FIG. 3 is a plan view of the base plate of the distributor
  • FIG. 4 is a view similar to FIG. 3 of a modified base plate
  • the casing 11 of the distributor is cast in an aluminum alloy and includes a peripheral inwardly directed shoulder 12 extending at right angles to the inner surface of the casing.
  • the casing 11 is also formed internally with a peripheral groove 13 extending radially into the casing 11 from the upper surface of the shoulder 12 and including an inclined surface 14 presented to the shoulder 12.
  • the plate In order to mount the base plate 15 in the casing 11 the plate is first tilted so that the chamfered portion 18 is presented to the casing. The plate 15 is then inserted into the casing until the chamfered portion 18, which extends from the periphery of the plate, is engaged in the groove, 13. The plate 15 is now allowed to drop into the casing whereby the plate seats on the support surface 12 and adopts the required horizontal position in the casing, the chamfered portion 18 remaining in engagement with the groove 13. A tapered self-tapping screw (not shown) is then engaged in the slot 19 and is screwed into the slot 19 so as to urge the resilient ear 21 away from the remainder of the base plate 15.
  • FIG. 4 which illustrates a modification of the base plate shown in FIG. 3 parts of the base plate common to the base plate shown in FIG. 3 are indicated by the same reference numeral.
  • the plate 15a differs from the plate 15 in that over a l are between the points XX in FIG. 4, the periphery of the plate is relieved, with the exception of that portion of the periphery defining the chamfered portion .17.
  • the radius of the chamfered portion 17 is then arranged to be equal to the radius of the plate 15a adjacent the chamfered portion 18, but
  • the ear 21 is preferably initially bent inwards in a direction to close the slot 19.
  • the plate can then be dropped into the casing without having to be tilted and will come to rest on the shoulder 12.
  • the screw is inserted into the portion 22 of the slot 19 whereby the ear 21 is flexed outwardly so that the radius of the chamfered portion 17 becomes greater than the radius of the plate 15a and the portions 17, 18 engage in the groove in the casing to clamp the plate in position.
  • FIG. illustrates the assembled distributor, in which the loose plate is mounted in the casing 11 and the self-tapping screw is engaged in the slot 19 so as to urge the resilient ear 21 into clamping engagement with the groove 13.
  • the cam shaft of the distributor, indicated at 31, then extends through the centrally disposed hole in the plate 15, which in turn supports the contact breaker assembly includes an angularly movable timing plate 32 which is coupled in conventional manner to the operating rod of a vacuum advance unit 33 and which carries the electrical contacts 34 of the contact breaker assembly.
  • the arrangement of the contact breaker assembly is entirely conventional so that, in use, during rotation of the cam shaft 31 the contacts are alternately opened and closed so as to provide sparks at the sparking plugs of the engine utilizing the distributor in turn.
  • the base plate described in the above examples could be provided with more than one chamfered region 18 (FIG. 7), in which case preferably the regions 18 and the ear 21 would be spaced around the periphery of the base plate, with the regions 18 all on the same side of a diameter of the plate, opposite the ear 21.
  • more than one ear 21 could be provided (FIG. 6),- and in the event that two ears 21 were provided they would desirably be diametrically opposite one another.
  • a distributor as claimed in claim 1 wherein said base plate is provided with a pair of peripherally extending chamfered portions formed respectively on the part of the base plate defining said resilient ear and a portion of the base plate diametrically opposite said resilient ear, said groove extending peripherally around the casing and being formed complementarily with said chamfered portions so that said clamping means urges said chamfered portions into engagement with said groove so as to c amp the base plate against axial and lateral movement relative to the casing.
  • a distributor as claimed in claim 3 wherein the regions of the periphery of the base plate on either side of the other of said chamfered portions are relieved so that said other chamfered portion projects beyond said relieved regions, said other chamfered portion having a radius equal to that of the periphery of the base plate adjacent said one chamfered portion and less than the radius of said one chamfered portion.
  • a distributor as claimed in claim 1 wherein said base plate is provided with a first peripherally extending chamfered portion formed on the part of the base plate defining said resilient ear, 'and a plurality of further peripherally extending chamfered portions formed on portion of the base plate diametrically opposite said resilient ear, said further chamfered portions being all on one side of a diameter of the base plate.
  • a distributor as claimed in claim 1 wherein said clamping means comprises a tapered screw extending through said slot and engaged therein.
  • a distributor as claimed in claim 7 wherein said slot is provided with a part-circular portion intermediate the ends of the slot and said tapered screw is engaged in said part-circular portion.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
US00165183A 1970-07-28 1971-07-22 An ignition distributor base plate having integral resilient securing means Expired - Lifetime US3723691A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3641570 1970-07-28

Publications (1)

Publication Number Publication Date
US3723691A true US3723691A (en) 1973-03-27

Family

ID=10387932

Family Applications (1)

Application Number Title Priority Date Filing Date
US00165183A Expired - Lifetime US3723691A (en) 1970-07-28 1971-07-22 An ignition distributor base plate having integral resilient securing means

Country Status (7)

Country Link
US (1) US3723691A (es)
JP (1) JPS5037815B1 (es)
AU (1) AU457408B2 (es)
DE (1) DE2136231A1 (es)
ES (1) ES171467Y (es)
FR (1) FR2103325A5 (es)
GB (1) GB1337987A (es)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3794795A (en) * 1972-01-15 1974-02-26 Lucas Industries Ltd Ignition distributor housing and resiliently attached distributor base plate

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2744966C2 (de) * 1977-10-06 1982-11-04 Robert Bosch Gmbh, 7000 Stuttgart Zündverteiler für Brennkraftmaschinen

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3444339A (en) * 1966-08-23 1969-05-13 Lucas Industries Ltd Ignition distributors

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3444339A (en) * 1966-08-23 1969-05-13 Lucas Industries Ltd Ignition distributors

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3794795A (en) * 1972-01-15 1974-02-26 Lucas Industries Ltd Ignition distributor housing and resiliently attached distributor base plate

Also Published As

Publication number Publication date
ES171467Y (es) 1972-07-16
AU457408B2 (en) 1975-01-30
AU3125071A (en) 1973-01-18
JPS5037815B1 (es) 1975-12-05
DE2136231A1 (de) 1972-02-03
FR2103325A5 (es) 1972-04-07
GB1337987A (en) 1973-11-21
ES171467U (es) 1971-12-16

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