US3723678A - Ignition switches - Google Patents

Ignition switches Download PDF

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Publication number
US3723678A
US3723678A US00199874A US3723678DA US3723678A US 3723678 A US3723678 A US 3723678A US 00199874 A US00199874 A US 00199874A US 3723678D A US3723678D A US 3723678DA US 3723678 A US3723678 A US 3723678A
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US
United States
Prior art keywords
rotor
casing
switch
bridging member
stable
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
US00199874A
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English (en)
Inventor
A Heap
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Individual
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Individual
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Publication date
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Publication of US3723678A publication Critical patent/US3723678A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H27/00—Switches operated by a removable member, e.g. key, plug or plate; Switches operated by setting members according to a single predetermined combination out of several possible settings
    • H01H27/06—Key inserted and then turned to effect operation of the switch
    • H01H27/063—Key inserted and then turned to effect operation of the switch wherein the switch cannot be moved to a third position, e.g. start position, unless the preceding movement was from a first position to a second position, e.g. ignition position

Definitions

  • An ignition switch comprises a casing and a rotor mounted in the casing for rotation within the casing from a stable first position to a stable second position and from the stable second position to an unstable third position, from which the rotor is resiliently urged back to said second position.
  • First and second fixed contacts are supported in the casing and a first bridging member is rotatable with the rotor and operable to complete an electrical circuit between the first and second fixed contacts in the third position of the rotor.
  • An arcuate cam track is provided on the inner surface of the casing and said first bridging member is resiliently urged into engagement with the cam track. The arrangement of the cam track is such that during movement of the rotor from the second position to the third position unless the preceding movement of the rotor was from the first position to the second position, the first bridging member is moved by the cam track in a direction such that in the third position the circuit between the first and second fixed contacts is not completed.
  • This invention relates to ignition switches for road vehicles.
  • An ignition switch comprises a casing, a rotor mounted in the casing for rotation within the casing from a stable first position to a stable second position and from the stable second position to an unstable third position from which the rotor is resiliently urged back to said second position, first and second fixed contacts supported in the casing, a first bridging member rotatable with the rotor and operable to complete an electrical circuit between said first and second fixed contacts in said third position of the rotor, and an arcuate cam track on the inner surface of the casing, said first bridging member being resiliently urged into engagement with said cam track, and the arrangement of said cam track being such that during movement of the rotor from said second position to said third position unless the preceding movement of the rotor was from the first position to the second position said first bridging member is moved by said cam track in a direction such that in said third position said circuit between the first and second fixed contacts is not completed.
  • the switch further includes a third fixed contact and a second bridging member movable with the rotor, the second bridging member serving to bridge the first and third fixed contacts in the second and third positions of the rotor, and the first fixed contact defining the feed terminal of the switch.
  • the first bridging member in the third position of the rotor is engaged with the second fixed contact and is engageable with said second bridging member so that when the first bridging member engages the second bridging member the circuit between the first and second fixed contacts is completed through the first and second bridging members.
  • the first bridging member in the third position of the rotor the first bridging member is engaged with the second bridging member and is engageable with the second fixed contact so that when the first bridging member engages the second fixed contact the circuit between the first and second fixed contacts is completed through the first and second bridging members.
  • FIG. 1 is a sectional view of part of an ignition switch according to one example of the invention
  • FIG. 2 is a plan view of the switch shown in FIG. 1 with the rotor removed for clarity
  • FIG. 3 is an exploded, fragmentary perspective view of the casing of the switch shown in FIG. 1,
  • FIG. 4 is a sectional view of an ignition switch according to a second example of the invention.
  • FIG. 5 is a sectional viewalong the line A-A in FIG. 4.
  • the switch includes a cylindrical casing 11 closed at one end thereof by a base 12.
  • a rotor 13 Housed within the casing 11 is a rotor 13, the rotor 13 being rotatable in the casing and including at its end remote from the base 12 an integral, axially extending spigot 14.
  • the spigot 14 is provided with a non-circular bore 15 which in use receives a non-circular shaft (not shown) coupled to the rotatable core of a key operated cylinder lock, the rotor 13 t being driven in use by the core of the lock and the cylinder of the lock being defined by the switch casing 11.
  • a contact plate 16 Mounted on the rotor 13 for rotation therewith is a contact plate 16, the contact plate 16 including a pair of slots 17 on opposite sides respectively of the plate 16 and the rotor 13 being formed integrally with a pair of lugs 18 which located in the slots 17 respectively to mount the contact plate 16 for rotation with the rotor 13.
  • a contact member 19 Engaged between the contact plate 16 and the rotor 13 is a contact member 19, the contact member 19 being rotatable with the rotor and defining with the contact plate 16 the movable contacts of the switch.
  • Mounted on the base 12 soas to extend into the casing 11 are a plurality of fixed contacts 21,22 (FIG. 2), 23 and 24, the contact plate 16 and the contact member 19 being resiliently urged by springs 25 towards the base 12 so as to complete electrical circuits between the fixed contacts during rotational movement of the rotor 13.
  • the switch is intended for use as the ignition switch of a road vehicle, the fixed contact 21 being connected to one terminal of the vehicle battery to define the feed terminal of the switch and the fixed contacts 22,23 and 24 being connected in an accessories circuit, the ignition circuit and the starter motor circuit of the vehicle respectively.
  • the feed contact 21 is positioned on the axis of rotation of the rotor 13 and hence is engaged by the contact plate 16 in all angular positions of the rotor.
  • the rotor l3. is movable in one angular direction from an off position, in which no electrical circuits are made, to a stable, first operative position in which the contact plate 16 bridges the accessories circuit of the vehicle.
  • the rotor 13 is movable in said one angular direction to a stable, second operative position in which the contact plate 16 remains in engagement with the accessories contact 22 and also bridges the ignition contact 23 and the terminal 21 so as to complete the ignition circuit, as well as the accessories circuit of the vehicle. From said second position, the rotor 13 is movable in said one angular direction to an unstable, third operative position in which the contact member 19 engages the starter motor contact 24 whereby the starter motor circuit of the vehicle is normally completed by way of the feed terminal 21, the contact plate 16, the contact member 19 and the contact 24. The ignition circuit is also completed by the contact plate 16 in the operative third position of the switch.
  • the rotor 13 In the third position, the rotor 13 is resiliently urged towards the second operative position by a spring 26 which is mounted around the spigot l4 for rotational movement with the rotor 13, the spring 26 engaging a fixed stop on the casing 11 during movement of the rotor 13 from the second position to the third position so as to be flexed in said third operative position.
  • the base 12 is provided with an upstanding cylindrical portion 12a which is formed on its inside surface remote from the fixed contact 24 with an arcuate cam track 27.
  • the cam track 27 extends intermediate the ends of a substantially flat, radially inwardly extending surface 28 and includes a raised plateau 29 defining at its summit a substantially flat, radially inwardly extending cam surface 31.
  • the surface 28 extends further into the casing 11 than the cam surface 31 and so defines with the plateau 29 and arcuately extending shoulder 32.
  • the plateau 29 is stepped to define a wide portion 29a and a narrow portion 29b so that the shoulder 32 is formed as two arcuately extending, radially spaced parts 32a, 32b defined between the surface 28 and the portions 29a, 29b respectively. Further the height of the shoulder part 32a decreases towards its end adjacent the part 29b to define an inclined surface 33 extending between the surface 28 and the cam surface 31. Also the plateau 29 adjacent its end remote from the portion 32b tapers towards the base portion 12a so that the distance the cam surface 31 extends into the casing 11 decreases to a zero value at said one end of the plateau 29.
  • the arrangement of the switch is such that the contact member 19 is resiliently urged towards the surface 28 by the springs 25 and during angular movement of the rotor 13 a cam follower 34 formed at one end of the contact member 19 is engageable with the cam track 27.
  • the contact member 19 is capable of radial movement relative to the casing 11 and the base portion 12a, a helical compression spring 35 urging the cam follower portion 34 radially towards the cam track 27.
  • the helical compression spring 35 is mounted in a recess 36 in the rotor 13 and acts between one end of the recess 36 and an upstanding finger 37 on the con-I tact member 19.
  • one of the springs 25 extends through an aperture 38 in the contact member 19 to urge the contact plate 16 towards the base 12, the dimensions of the aperture 38 are such as to allow radial movement on the contact member 19 relative to the spring 25.
  • the cam follower 34 moves parallel to but is spaced above the surface 28.
  • the accessories circuit of the vehicle incorporating the switch is made and during further movement of the rotor 13 from the first operative position towards the second operative position the cam follower 34, as it moves over the surface 28, engages the shoulder 32 at the tapered end of the plateau 29.
  • the contact member 19 is then urged by the spring 35 in a direction to move the cam follower 34 radially outwardly towards the base portion 12a although a fixed stop (not shown) prevents the portion 34 from actually engaging the base portion 120. If the rotor is now immediately moved back into the third operative position, without initially going to the first operative position, then the cam follower portion 34 will be constrained to move over the region of the cam surface 31 defined above the narrow portion 290 of the plateau 29.
  • the height of the cam surface 31 above the cam surface 28 is arranged to be such that, when the cam follower 34 is in engagement with the cam surface 31, the contact member 19 is pivoted about its end remote from the cam follower 34 so that the member 19 is spaced from the contact plate 16 wherebythe circuit between the terminal 21 and the contact 24 is not completed.
  • the switch includes a cylindrical, twopart casing 41 in which is housed a rotor 42 so that the rotor 42 is rotatable in the casing.
  • the rotor 42 carries at one end a metal plate 43 for rotation with the rotor and receives at its other end a non-circular shaft coupled to the rotatable core of a key operated cylinder lock, the rotor 42 being driven in use by the core of the lock and the cylinder of the lock being defined by the switch casing 41.
  • the ignition switch of this second example of the invention also provides a lock for the gear box of the road vehicle using the switch, whereby movement of the gear selector shaft 44 of the road vehicle is prevented when the switch is in the locking position.
  • the gear box lock feature of the switch is provided by a ball 45 engaged with the plate 43 and urged into a recess 46 in the shaft 44 when the switch is in the locking position by a cam surface (not shown) formed on the surface of the plate 43 remote from the rotor 42.
  • a contact plate 47 and a contact member 48 Carried by the rotor 42 for rotation with the rotor are a contact plate 47 and a contact member 48, the contact member 48 being urged by a spring 49 into engagement with the contact plate 47.
  • the contact plate 47 and the contact member 48 define the movable contacts of the switch and supported by the casing 41 are a plurality of angularly spaced fixed contacts 51,52,53 and 54.
  • the spring 49 urges the contact member 48 and the contact plate 47 towards the fixed contacts so that the plate 47 and the member 48 complete electrical circuits between the fixed contacts during rotational movement of the rotor 42.
  • the fixed contact 51 When the switch is in use on a road vehicle, the fixed contact 51 is connected to one terminal of the vehicle battery to define the feed terminal of the switch and the fixed contacts 52,53 and 54 are connected in an accessories circuit, the ignition circuit and the starter motor circuit of the vehicle respectively.
  • the fixed contact 51 is positioned adjacent the axis of rotation of the rotor 42 and is arranged so that the contact plate 47 engages the fixed contact 51 in each of three operative positions of the rotor, but is spaced from the contact 51 in an inoperative position of the rotor. Thus, in the inoperative position no electrical circuits are made, the rotor then being movable in a clockwise direction as shown in FIG.
  • the rotor 42 is movable in a clockwise direction to a stable, second operative position in which the contact plate 47 engages the feed terminal 51, the accessories contact 52 and the ignition contact 53 so as to complete both the ignition circuit and the accessories circuit of the vehicle.
  • the rotor 42 is movable in a clockwise direction to an unstable, third operative position in which the contact plate bridges the ignition contact 53 and the feed terminal 51 to complete the ignition circuit and the contact member 48 normally engages the starter motor contact 54 whereby the starter motor circuit is normally completed by way of the contact 54, the member 48, the plate 47 and the feed terminal 51.
  • a spring 55 is flexed during movement of the rotor from the second operative position to the third operative position so that the rotor 42 is resiliently urged from the third operative position towards the second operative position.
  • the rotor 42 also carries a spring urged ball 56 which engages and moves over a detent surface 57 during rotational movement of the rotor 42, whereby-the rotor is releasably retained in the inoperative position and each of the first and second operative positions.
  • the casing 11 of the switch is formed on its inside surface with an arcuate cam track 58 and the contact member 48 is formed with a cam follower 59 which is resiliently urged into engagement with the cam track 58 by the spring 49 and a further spring 61, the contact member 48 being movable radially in the casing 11 against the resilient action of the spring 61.
  • the cam track 58 is substantially the same as the cam track 47 described in the first example of the invention and shown in FIG.
  • the arrangement of the switch according to the second example being such that if the rotor 42 is moved from the second operative position to the third operative position without previously being moved from the first operative position to the second operative position the contact member 48 is moved in a direction away from the fixed contact 54, whereby in the third operative position the contact member 48 is spaced from the fixed contact 54 and the starter motor circuit of the vehicle is not completed.
  • the contact member 48 engages the fixed contact 54 in the third operative position and the starter motor circuit of the vehicle is completed.
  • An ignition switch comprising a casing, a rotor in the casing, means mounting the rotor for rotation within the casing from a stable first position to a stable second position and from the stable second position to an unstable third position from which the rotor is resiliently urged back to said second position, first and second fixed contacts supported in the casing, a first bridging member rotatable with the rotor and operable to complete an electrical circuit between said first and second fixed contacts in said first position of the rotor, an arcuate cam track on the inner surface of the casing, resilient means urging said first bridging member into engagement with said cam track, and a cam surface forming part of said cam track and being engageable by said first bridging member during movement of the rotor from said second position to said first position unless the preceding movement of the rotor was from the first position to the second position, said cam surface being arranged so as to move said first bridging member, when engaged by the bridging member, in a direction such that in said third position said circuit between

Landscapes

  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Portable Nailing Machines And Staplers (AREA)
US00199874A 1970-11-21 1971-11-18 Ignition switches Expired - Lifetime US3723678A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5549970A GB1362176A (en) 1970-11-21 1970-11-21 Ignition switches

Publications (1)

Publication Number Publication Date
US3723678A true US3723678A (en) 1973-03-27

Family

ID=10474110

Family Applications (1)

Application Number Title Priority Date Filing Date
US00199874A Expired - Lifetime US3723678A (en) 1970-11-21 1971-11-18 Ignition switches

Country Status (9)

Country Link
US (1) US3723678A (de)
JP (1) JPS5538773B1 (de)
AR (1) AR201727A1 (de)
AU (1) AU453970B2 (de)
DE (1) DE2157462C3 (de)
ES (1) ES174677Y (de)
FR (1) FR2115879A5 (de)
GB (1) GB1362176A (de)
IT (1) IT945024B (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3858055A (en) * 1972-07-25 1974-12-31 Lucas Electrical Co Ltd Combined electrical switch and lock assembly
US4112267A (en) * 1976-08-18 1978-09-05 The United States Of America As Represented By The Secretary Of The Army Coded switching device
US4286126A (en) * 1978-06-22 1981-08-25 Firma Leopold Kostal Ignition switch
US4298776A (en) * 1978-06-03 1981-11-03 Siegfried Sondermann Motor vehicle ignition-starter switch
CN104838461A (zh) * 2012-10-05 2015-08-12 法国有信公司 用于致动机动车辆的功能或元件的防复位***

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0346446Y2 (de) * 1986-02-13 1991-10-01
DE8711243U1 (de) * 1987-08-18 1987-10-08 Nixdorf Computer Ag, 4790 Paderborn Zylinderschloß mit elektrischer Schalteranordnung
DE4242646C2 (de) * 1992-12-17 1995-01-19 Merit Werk Merten & Co Kg Schalter, insbesondere Zündanlasserschalter, mit Wiedereinschaltsperre
FR2948489B1 (fr) * 2009-07-27 2011-11-11 Valeo Securite Habitacle Interrupteur de demarrage adaptable
FR2965230B1 (fr) * 2010-09-28 2020-02-28 U-Shin France Sas Antivol de direction pour vehicule automobile

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2121671A (en) * 1938-06-21 Ignition starter control
DE1131465B (de) * 1960-07-09 1962-06-14 Leopold Kostal Elektrotechn Sp Vereinigter Zuend- und Anlassschalter
US3172968A (en) * 1959-06-18 1965-03-09 Bosch Gmbh Robert Multi-position electric switch lock assembly
FR1525502A (fr) * 1966-06-09 1968-05-17 Lucas Industries Ltd Interrupteur d'allumage
GB1160140A (en) * 1966-12-14 1969-07-30 D H Bonnella & Son Ltd Improvements relating to Rotary Switches
US3539737A (en) * 1967-11-14 1970-11-10 Bosch Gmbh Robert Electric switch
US3622716A (en) * 1969-03-17 1971-11-23 Lucas Industries Ltd Ignition switch with plate-latching means preventing movement from on to start once started
US3632916A (en) * 1970-05-25 1972-01-04 Indak Mfg Corp Electrical switch with selective blocking action

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2121671A (en) * 1938-06-21 Ignition starter control
US3172968A (en) * 1959-06-18 1965-03-09 Bosch Gmbh Robert Multi-position electric switch lock assembly
DE1131465B (de) * 1960-07-09 1962-06-14 Leopold Kostal Elektrotechn Sp Vereinigter Zuend- und Anlassschalter
FR1525502A (fr) * 1966-06-09 1968-05-17 Lucas Industries Ltd Interrupteur d'allumage
GB1160140A (en) * 1966-12-14 1969-07-30 D H Bonnella & Son Ltd Improvements relating to Rotary Switches
US3539737A (en) * 1967-11-14 1970-11-10 Bosch Gmbh Robert Electric switch
US3622716A (en) * 1969-03-17 1971-11-23 Lucas Industries Ltd Ignition switch with plate-latching means preventing movement from on to start once started
US3632916A (en) * 1970-05-25 1972-01-04 Indak Mfg Corp Electrical switch with selective blocking action

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3858055A (en) * 1972-07-25 1974-12-31 Lucas Electrical Co Ltd Combined electrical switch and lock assembly
US4112267A (en) * 1976-08-18 1978-09-05 The United States Of America As Represented By The Secretary Of The Army Coded switching device
US4298776A (en) * 1978-06-03 1981-11-03 Siegfried Sondermann Motor vehicle ignition-starter switch
US4286126A (en) * 1978-06-22 1981-08-25 Firma Leopold Kostal Ignition switch
CN104838461A (zh) * 2012-10-05 2015-08-12 法国有信公司 用于致动机动车辆的功能或元件的防复位***
CN104838461B (zh) * 2012-10-05 2017-09-22 法国有信公司 用于致动机动车辆的功能或元件的防复位***

Also Published As

Publication number Publication date
ES174677Y (es) 1972-11-16
GB1362176A (en) 1974-07-30
FR2115879A5 (de) 1972-07-07
DE2157462A1 (de) 1972-05-31
JPS5538773B1 (de) 1980-10-06
IT945024B (it) 1973-05-10
ES174677U (es) 1972-05-01
DE2157462C3 (de) 1980-09-18
AR201727A1 (es) 1975-04-15
JPS4711156A (de) 1972-06-03
AU453970B2 (en) 1974-10-17
DE2157462B2 (de) 1980-01-17
AU3579971A (en) 1973-05-24

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