US3794795A - Ignition distributor housing and resiliently attached distributor base plate - Google Patents

Ignition distributor housing and resiliently attached distributor base plate Download PDF

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Publication number
US3794795A
US3794795A US00323383A US3794795DA US3794795A US 3794795 A US3794795 A US 3794795A US 00323383 A US00323383 A US 00323383A US 3794795D A US3794795D A US 3794795DA US 3794795 A US3794795 A US 3794795A
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US
United States
Prior art keywords
mounting plate
groove
casing
limb
ignition distributor
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
US00323383A
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English (en)
Inventor
K Tromans
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 US3794795A publication Critical patent/US3794795A/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

  • An ignition distributor for use in an internal combustion engine spark ignition system including a hollow casing formed internally with a support surface and a groove.
  • the groove extends radially into the wall of the casing from the support surface.
  • the distributor further includes a contact breaker assembly mounting plate which is supported on the support surface, and which includes a peripheral region capable of being engaged in a region of the groove in the casing wall.
  • a spring member is provided which urges the mounting plate both downwardly onto the support surface and transversely so that the region of the plate engages in the corresponding region of the groove.
  • An ignition distributor includes, a hollow casing formed internally with a support surface and a groove, the groove extending radially into the wall of the casing from the support surface, a contact breaker assembly mounting plate supported on the support surface and having a peripheral region engageable in the groove, and a resilient member engaging the casing and the mounting plate and urging the mounting plate both downwardly onto the support surfaceand transversely so as to engage said peripheral region in the groove.
  • peripheral region of the mounting plate is chamfered so as to wedgingly engage the walls of the groove.
  • the resilient member is a spring steel strip of generally L shaped configuration, one limb of the strip engaging the casing and the other limb engaging the mounting plate.
  • the free end of the one limb engages a shoulder on the inner surface of the casing.
  • the other limb is secured to the mounting plate by a screw fastening device.
  • the other limb of the resilient member includes a portion extending into an aperture in the mounting plate the portion abutting the wall of the aperture.
  • the mounting plate is provided, opposite the peripheral region, with a slot extending from the periphery of the mounting plate along a chord of the mounting plate so as to define a resilient ear integral with the mounting plate, clamping means being provided for urging the resilient ear in a direction away from the remainder of the base plate so as to engage the resilient ear in the groove and so aid the action of the resilient member in clamping the mounting plate in position in the casing.
  • the periphery of the resilient car which engages in the groove is chamfered so as to wedgingly engage the walls of the groove.
  • the clamping means for urging the resilient ear in a direction away from the remainder of the mounting plate comprises a tapered screw which extends through the slot, the tapered screw serving also to secure the resilient member to the mounting plate.
  • FIG. 1 is a diagrammaticrepresentation of part of an ignition distributor
  • FIG. 2 is a plan view of an alternative form of contact breaker assembly mounting plate for the distributor to that shown in FIG. 1, and
  • FIG. 3 is a side view enlarged of a modification of the spring strip shown in FIG. 1.
  • the distributor includes a hollow metal casing 1 1 formed internally with a radially inwardly directed shoulder 12.
  • the shoulder 12 extends into the wall thickness of the casing 11, and together with an inclined surface 14 defines a peripheral groove 13.
  • Seated on the shoulder 12 is a contact breaker assembly mounting plate 15, which, in use,
  • the mounting plate 15 is annular, and the cam shaft of the distributor extends through the central hole of the plate 15 in the usual manner.
  • a region 16 of the periphery of the plate 15 is chamfered, and positioned generally diametrically opposite the region 16 is a resilient member 17 in the form of a generally L-shaped strip of spring steel.
  • the free end of the upright limb 17a of the member 17 is engaged with a step 18 formed in the wall of the casing 11, and the other limb 17b of the member 17 is secured to the plate 15 by means of a screw 19.
  • the arrangement of the member 17, the plate 15 and the casing 11 is such that when secured in position the resilient member 17 urges the plate 15 both downwardly onto the shoulder 12, and transversely so that the chamfered region 16 of the periphery of the plate 15 wedgingly engages the V shaped groove 13.
  • the resilient member 17 is secured in position in the following manner.
  • the free end of the limb 17a is engaged beneath the step 18, and the free end of the limb 17b touches the plate 15.
  • the aperture in the limb 17b for the screw 19 is at this stage to the right of the corresponding aperture in the plate 15, and moreover, the limb 17b is not parallel to the plate.
  • the member 17 In order to insert the screw 19 through the limb 17b and into the plate 15 the member 17 must be flexed to move the limb 1712 both downwardly, and to the left. Thus when the screw 19 is inserted through the aperture in the limb 17b, and into the corresponding hole in the plate 15 to secure the member 17 in position, then the member will urge the plate 15 both downwardly and transversely as required.
  • the modified resilient member 17 shown in FIG. 3 is again formed from spring strip and is of generally L- shaped configuration having a pair of limbs 27a, 27 b.
  • the free end of the upright limb 27a is bent out of the plane of the remainder of the limb 27a and is engaged under the step 18 in use.
  • the limb 27b is formed with a hole through which the fixing screw extends in use to secure the member 27 in position.
  • the limb 27a is formed with a V-shaped region intermediate its ends the V-shaped region enhancing the resilient action of the member 27 in urging the plate 15 downwardly and transversely.
  • the member 27 is secured in position by firstly fixing the limb 27b to the plate 15 by means of a screw.
  • the limb 27a is flexed to engage its free end with the step 18 of the casing. It will be appreciated that the member 17 could be secured in position in this manner and that the member 27 could, if desired, be secured in position by the method described with reference to member 17.
  • the dimensions of the plate 15, the shoulder 12, and the groove 13 are so chosen that the plate 15 can be inserted into the casing to rest on the shoulder 12, and can still be moved sufficiently far to wedgingly engage the region 16 of the periphery of the plate with the groove 13 without the opposite edge of the plate 15 leaving the shoulder 12.
  • the mounting plate 15 is formed with a slot 21 which extends from the periphery of the plate 15 along a chord thereof to define a resilient ear 22 integral with the plate 15.
  • the chamfered region 16 is diametrically opposite the ear 2 2, and moreover the chamfered region 16 projects radially outwardly from the periphery edge of the plate 15.
  • arcuate edge of the car 22 is chamfered, and with the exception of the ear 22 the periphery of the plate over the plate.
  • the plate is then dropped into the distributor casing and is supported on the shoulder 12.
  • a tapered screw is then inserted into the slot 21 and is rotated.
  • the action of the tapered screw in the slot 21 flexes the ear 22 outwardly away from the remainder of the plate, so that the chamfered edge of the ear22 engages in the groove 13 at one side of the casing and the chamfered region 16 of the plate engages in the groove 13 at the opposite side of the casing.
  • the tapered screw which is inserted through the slot 21 also serves to hold in position the resilient member 17, or 27 the combined action of the resilient member and the ear 22 serving to secure the mounting plate in position within the casing.
  • a conventional contact breaker assembly is mounted on the mounting plate 15 either directly, or through the intermediary of an angularly movable plate to facilitate adjustment in the ignition timing of the distributor.
  • the cam shaft of the distributor extends through the central hole of the mounting plate 15 in the usual manner, and co-acts in the conventional manner with an insulating heel member of the contact breaker assembly.
  • the casing of the distributor is closed in use by an insulating cap carrying high tension output terminals disposed around its periphery, and a centrally disposed high tension input terminal.
  • An ignition distributor including a hollow casing formed internally with a support surface and a groove, said groove extending radially into the wall of said casing from said support surface, a contact breaker assembly mounting plate supported on said support surface, and having a peripheral region which is engageable in said groove, a single resilient member engaged both with said casing and said mounting plate, and resiliently biasing said mounting plate both downwardly onto said support surface, and transversely so as to engage said peripheral region of said mounting plate in said groove, and, said peripheral region of said mounting plate and said groove being so shaped in relation to one another that said peripheral region engages in said groove with awedging actionv 2.
  • said resilient member is a spring steel strip of generally L-shaped configuration, one limb of said strip engaging said casing and said other limb engaging said mounting plate. 7 V
  • An ignition distributor as claimed in claim 1 wherein said mounting plate is provided opposite'said peripheral region with a slot extending from the periphery of said mounting plate along a chord of said mounting plate so as to define a resilient ear integral with said mounting plate, clamping means being provided for urging said resilient ear ina direction away from the remainder of said mounting plate so as to' engage said resilient ear in said groove and so aid the action of said- 7 resilient member in clamping saidmounting plate in position in said casing.

Landscapes

  • 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)
US00323383A 1972-01-15 1973-01-15 Ignition distributor housing and resiliently attached distributor base plate Expired - Lifetime US3794795A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB202672*[A GB1407231A (en) 1972-01-15 1972-01-15 Ignition distributors

Publications (1)

Publication Number Publication Date
US3794795A true US3794795A (en) 1974-02-26

Family

ID=9732311

Family Applications (1)

Application Number Title Priority Date Filing Date
US00323383A Expired - Lifetime US3794795A (en) 1972-01-15 1973-01-15 Ignition distributor housing and resiliently attached distributor base plate

Country Status (13)

Country Link
US (1) US3794795A (de)
JP (1) JPS4880924A (de)
AR (1) AR199194A1 (de)
AU (1) AU465608B2 (de)
DE (1) DE2301675A1 (de)
ES (1) ES187635Y (de)
FR (1) FR2168777A5 (de)
GB (1) GB1407231A (de)
HU (1) HU166119B (de)
IT (1) IT976847B (de)
SU (1) SU555865A3 (de)
YU (1) YU33592B (de)
ZA (1) ZA73245B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4088853A (en) * 1975-12-09 1978-05-09 Robert Bosch Gmbh Ignition distributor-breaker structure for internal combustion engines

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2645597B1 (fr) * 1989-04-06 1991-07-19 Marchal Equip Auto Distributeur d'allumage a blocage provisoire du rotor pour moteur a combustion interne

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2125368A (en) * 1936-12-30 1938-08-02 Gen Motors Corp Ball bearing timer distributor
US2444149A (en) * 1946-01-18 1948-06-29 Seth E Aldridge Ignition timer
US3479472A (en) * 1966-09-09 1969-11-18 Lucas Industries Ltd Ignition distributors utilizing a spring clip means
US3715531A (en) * 1970-07-23 1973-02-06 Lucas Industries Ltd Distributor housing and plate assembly with rotatable clamping means
US3723691A (en) * 1970-07-28 1973-03-27 Lucas Industries Ltd An ignition distributor base plate having integral resilient securing means

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2125368A (en) * 1936-12-30 1938-08-02 Gen Motors Corp Ball bearing timer distributor
US2444149A (en) * 1946-01-18 1948-06-29 Seth E Aldridge Ignition timer
US3479472A (en) * 1966-09-09 1969-11-18 Lucas Industries Ltd Ignition distributors utilizing a spring clip means
US3715531A (en) * 1970-07-23 1973-02-06 Lucas Industries Ltd Distributor housing and plate assembly with rotatable clamping means
US3723691A (en) * 1970-07-28 1973-03-27 Lucas Industries Ltd An ignition distributor base plate having integral resilient securing means

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4088853A (en) * 1975-12-09 1978-05-09 Robert Bosch Gmbh Ignition distributor-breaker structure for internal combustion engines

Also Published As

Publication number Publication date
ES187635Y (es) 1974-08-16
SU555865A3 (ru) 1977-04-25
HU166119B (de) 1975-01-28
YU33592B (en) 1977-08-31
ES187635U (es) 1974-01-01
JPS4880924A (de) 1973-10-30
FR2168777A5 (de) 1973-08-31
AR199194A1 (es) 1974-08-14
DE2301675A1 (de) 1973-07-19
ZA73245B (en) 1973-10-31
YU9673A (en) 1977-02-28
GB1407231A (en) 1975-09-24
AU5078273A (en) 1974-07-11
IT976847B (it) 1974-09-10
AU465608B2 (en) 1975-10-02

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