US3621159A - Ignition switch with blocking means - Google Patents

Ignition switch with blocking means Download PDF

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Publication number
US3621159A
US3621159A US9930A US3621159DA US3621159A US 3621159 A US3621159 A US 3621159A US 9930 A US9930 A US 9930A US 3621159D A US3621159D A US 3621159DA US 3621159 A US3621159 A US 3621159A
Authority
US
United States
Prior art keywords
rotor
pawl
casing
cam form
switch
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
US9930A
Other languages
English (en)
Inventor
Alec John Heap
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 US3621159A publication Critical patent/US3621159A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/02—Arrangements of circuit components or wiring on supporting structure
    • H05K7/10—Plug-in assemblages of components, e.g. IC sockets
    • H05K7/1007—Plug-in assemblages of components, e.g. IC sockets with means for increasing contact pressure at the end of engagement of coupling parts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
    • H01H19/54—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand the operating part having at least five or an unspecified number of operative positions
    • H01H19/60—Angularly-movable actuating part carrying no contacts
    • H01H19/62—Contacts actuated by radial cams
    • 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 electrical switch for use in road vehicles includes a casing carrying fixed contacts, and a rotor mounted for rotation in the casing of the rotor carrying a movable contact engageable with the fixed contacts to complete the circuits of the switch.
  • the rotor has first and second stable positions with respect to the casing, and also has an unstable third position. the rotor being urged angularly from its third position back to its second position by a torsion spring.
  • a cam form is provided on the casing, and a pawl is mounted on the rotor and is engageable with the cam form.
  • the pawl is spring urged to either a first or second position relative to the rotor, and the arrangement of the pawl and the cam form on the casing is such that the pawl prevents movement of the rotor from its second position to its third position unless the previous movement of the rotor has been from its first position to its second position.
  • PATENTEDNUV 16 I971. 3, 1,159
  • An electrical switch includes a casing carrying fixed contacts, a rotor carrying movable contacts engageable with said fixed contact to complete circuits through the switch, the rotor being mounted for rotation in the casing from a stable first position to a stable second position and for rotation from said stable second position to an unstable third position, resilient means urging said rotor from said third position to said second position, and means preventing rotation of the rotor to said third position from said second position unless the previous movement of the rotor has been from said first position to said second position, characterized in that, said means comprises a cam form on the casing, a pawl engageable with the cam form and mounted on the rotor for angular movement relative thereto between a first position in which the pawl and the cam form cooperate to prevent movement of the rotor from its second position to its third position and a second position in which the pawl and the cam form do not prevent movement of the rotor from its second position to its third position, and further resilient means urging the pawl to either of
  • FIG. 1 is a sectional view of an ignition switch in a first position
  • FIGS. 2, 3 and 4 are views similar to FIG. 1 showing the switch in three other positions, and
  • FIG. 5 is a sectional view of the switch in a plane at right angles to the plane of the section in FIG. I.
  • the ignition switch includes a casing 11 housing a rotor II.
  • the rotor 12 is mounted for rotation within the casing, and carries movable contacts 12a which cooperate with a plurality of angularly spaced fixed contacts 21 carried by a base 20 closing one end of the casing 11.
  • the rotor includes an integral spigot 13 which extends into a sleeve integral with the casing 11, and the barrel of a cylinder lock is coupled to the spigot I3 so that rotation of the barrel of the cylinder lock by means of an operating key causes corresponding rotation 7 of the rotor 13 relative to the casing 11 and the fixed contacts 21.
  • the rotor 12 has three operating positions with respect to the casing 11, a first position which is an off position wherein none of the circuits of the ignition switch are completed, a second position which is an ignition position, wherein the ignition circuit, of the vehicle in which the ignition switch is utilized, is completed through the ignition switch, and a third position which is a start position wherein both the ignition circuit and the starter motor circuit of the vehicle are completed through the ignition switch.
  • Detent means (not shown) are provided for locating the rotor in either of its first or second positions with respect to the casing, and a torsion spring 23 is provided for urging the rotor from its third position back to its second position.
  • a post 14 Integral with the rotor 13, and upstanding therefrom parallel with the axis of rotation of the rotor 13 is a post 14 upon which is pivotally mounted a pawl 15.
  • the pawl 15 is generally triangular, with its apex generally presented towards the axis of rotation of the rotor, and its base presented towards the inner wall of the casing 11.
  • Adjacent the pawl 15 the inner wall of the casing 11 is provided with a cam form including a radially inwardly directed projection 16 and a radial outwardly extending depression 17.
  • a resilient leaf spring 18 Secured to the rotor 12 is a resilient leaf spring 18 which is engaged, intermediate its ends,
  • the central region of the spring I8 is bent to define a portion which extends towards the pawl I5, and the arrangement is such that when the apex of the pawl I5 engages the projection of the spring 18, then the spring I8 is stressed.
  • the spring 18 urges the pawl 15 to either of a pair of positions, wherein the projection of the spring 18 engages one or other of the sides of the pawl.
  • One extremity of the pawl 15 adjacent the inner surface of the casing 11 is provided with an integral lug 15a which extends from the base of the pawl I5 towards the inner wall of the casing I I.
  • the pawl 15 is moved by virtue of engagement of the base of the pawl with the projection I6, about the post 14, against the action of the spring I8.
  • the spring 18 no longer resists the movement of the pawl 15, but urges the pawl 15 to rotate about the post 14 in the same direction.
  • the pawl 15 is urged by the spring 18 to an intermediate position wherein the lug 15a engages the inner surface of the casing lll.
  • the rotor 12 is urged by the torsion spring 23 from its third position to its second position, and so upon releasing the operating key of the ignition switch when the rotor is in the third position, the rotor is moved back to its second position.
  • the lug 15a is aligned with the depression 17, and so under the influence of the spring 18 the pawl 15 is moved angularly about the post 14 to the first position of the pawl, wherein the lug 15a enters the depression 17.
  • the rotor must first be moved from its second position back to its first position. Clockwise rotation of the rotor 12 from its second position back to its first position engages the lug 15a with the projection 16, so that the pawl 15 is moved angularly about the post 14 from its first position back to its second position.
  • the parts of the switch will, be in the positions shown in FIG. I, so that the above sequence of operations is repeated upon actuation of the switch.
  • An electrical switch for a road vehicle including a casing carrying fixed contacts, a rotor carrying movable contacts engageable with said fixed contact to complete circuits through the switch, the rotor being mounted for rotation in the casing from a stable first position to a stable second position and for rotation from said stable second position to an unstable third position, resilient means urging said rotor from said third position to said second position, and means preventing rotation of the rotor to said third position from said second position unless the previous movement of the rotor has been from said first position to said second position, characterized in that, said means comprises a cam form on the casing, a pawl engageable with the cam form and mounted on the rotor for angular movement relative thereto between a first position in which the pawl and the cam form cooperate to prevent movemerit of the rotor from its second position to its third position and a second position in which the pawl and the cam form do not prevent movement of the rotor from its second position to its third position, and further resilient means urging the

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Mechanisms For Operating Contacts (AREA)
  • Lock And Its Accessories (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
US9930A 1969-02-18 1970-02-10 Ignition switch with blocking means Expired - Lifetime US3621159A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB861469 1969-02-18
US4203270A 1970-06-01 1970-06-01

Publications (1)

Publication Number Publication Date
US3621159A true US3621159A (en) 1971-11-16

Family

ID=26242294

Family Applications (2)

Application Number Title Priority Date Filing Date
US9930A Expired - Lifetime US3621159A (en) 1969-02-18 1970-02-10 Ignition switch with blocking means
US42032A Expired - Lifetime US3621157A (en) 1969-02-18 1970-06-01 Miniature switch with multiple cam-operated switch contacts

Family Applications After (1)

Application Number Title Priority Date Filing Date
US42032A Expired - Lifetime US3621157A (en) 1969-02-18 1970-06-01 Miniature switch with multiple cam-operated switch contacts

Country Status (4)

Country Link
US (2) US3621159A (xx)
DE (1) DE2007257A1 (xx)
FR (1) FR2035620A5 (xx)
GB (1) GB1290148A (xx)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4298776A (en) * 1978-06-03 1981-11-03 Siegfried Sondermann Motor vehicle ignition-starter switch
US4350852A (en) * 1979-12-07 1982-09-21 Sodex-Magister, Societe D'exploitation Des Brevets Neiman Bi-stable mechanism and anti-theft device for a motor vehicle comprising such mechanism
US4659883A (en) * 1984-09-01 1987-04-21 Schaltbau Gmbh Repeat lock and inhibitor for starters of combustion engines

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1363652A (en) * 1970-09-30 1974-08-14 Erg Ind Corp Ltd Electric switches
US3786208A (en) * 1972-08-09 1974-01-15 Scott & Fetzer Co Plug-in timer assembly
US3792206A (en) * 1972-11-13 1974-02-12 Amp Inc Binary codable, cam operated, pivoted contact switch assembly
US3831272A (en) * 1972-11-13 1974-08-27 Amp Inc Method of making selective switch contacts
IT1001629B (it) * 1972-11-13 1976-04-30 Amp Inc Telaio di conduttori per disposi tivo commutatore
US3883705A (en) * 1974-01-11 1975-05-13 Molex Inc Cam operated, pivoted contact switch assembly having split housing and safety cover
US3860775A (en) * 1973-11-16 1975-01-14 Illinois Tool Works Electrical switch having movable spring contacts which provide wiping action with associated stationary contacts
USRE28555E (en) * 1973-11-16 1975-09-16 Electrical switch having movable spring contacts which provide wiping action with associated stationary contacts
US3900709A (en) * 1974-03-25 1975-08-19 Amp Inc Multiple switch assembly having independent operators rotatably cumming discrete leaf spring type contact assemblies
US3945808A (en) * 1974-04-15 1976-03-23 Amp Incorporated Lead frame adapted for electrical switch package
DE2451034C3 (de) * 1974-10-26 1980-08-14 J. & J. Marquardt, 7201 Rietheim Elektrischer Schalter
US4059738A (en) * 1976-05-24 1977-11-22 Tower Manufacturing Corporation Multi-position switch assembly having plural operator with primary and secondary detented cams
US4182939A (en) * 1977-03-04 1980-01-08 Sonitronics, Inc. Miniature switches
US4478472A (en) * 1981-10-26 1984-10-23 Rca Corporation Electrical connector
GB8421549D0 (en) * 1984-08-24 1984-09-26 Jones G P Connector device
DE8701554U1 (de) * 1987-02-02 1988-06-01 Bär Elektrowerke GmbH & Co KG, 5885 Schalksmühle Drehschalter für elektrische Geräte, insbesondere Haushaltsgeräte
US6345464B1 (en) * 1999-01-13 2002-02-12 Surefire, Llc Firearms with target illuminators, electric switching devices and battery power sources

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
GB1018357A (en) * 1963-11-16 1966-01-26 Rau Swf Autozubehoer Improvements in switches for direction indicators of mechanically propelled vehicles

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1069235B (xx) * 1955-09-28 1959-11-19
US3251956A (en) * 1963-04-09 1966-05-17 Gemco Electric Co Electric switch
GB1079642A (en) * 1964-05-28 1967-08-16 Carr Fastener Co Ltd Rotary switch
GB1089887A (en) * 1965-03-31 1967-11-08 Carr Fastener Co Ltd Rotary switch
US3335240A (en) * 1966-03-28 1967-08-08 Guardian Electric Mfg Co Snap action switch device with improved circuit breaker mechanism
DE1990412U (de) * 1966-09-16 1968-08-01 SEL Kontakt Bauelemente Gesellschaft mit beschrank (er Haftung 8500 Nürnberg Drehoder Schiebeschalter m Paketbauweise

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
GB1018357A (en) * 1963-11-16 1966-01-26 Rau Swf Autozubehoer Improvements in switches for direction indicators of mechanically propelled vehicles

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4298776A (en) * 1978-06-03 1981-11-03 Siegfried Sondermann Motor vehicle ignition-starter switch
US4350852A (en) * 1979-12-07 1982-09-21 Sodex-Magister, Societe D'exploitation Des Brevets Neiman Bi-stable mechanism and anti-theft device for a motor vehicle comprising such mechanism
US4659883A (en) * 1984-09-01 1987-04-21 Schaltbau Gmbh Repeat lock and inhibitor for starters of combustion engines

Also Published As

Publication number Publication date
FR2035620A5 (xx) 1970-12-18
GB1290148A (xx) 1972-09-20
US3621157A (en) 1971-11-16
DE2007257A1 (de) 1970-09-10

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