US3746803A - Electrical switch having two movable contacts operable by a rotor and having fixed contact posts - Google Patents

Electrical switch having two movable contacts operable by a rotor and having fixed contact posts Download PDF

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Publication number
US3746803A
US3746803A US00187272A US3746803DA US3746803A US 3746803 A US3746803 A US 3746803A US 00187272 A US00187272 A US 00187272A US 3746803D A US3746803D A US 3746803DA US 3746803 A US3746803 A US 3746803A
Authority
US
United States
Prior art keywords
rotor
contact
angular position
posts
limbs
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
US00187272A
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English (en)
Inventor
E Cryer
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 US3746803A publication Critical patent/US3746803A/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
    • H01H23/00—Tumbler or rocker switches, i.e. switches characterised by being operated by rocking an operating member in the form of a rocker button
    • H01H23/02—Details

Definitions

  • An electrical switch has a base and a cover between which is mounted a rotor carrying a movable contact. On the base there are first and second contact posts,
  • An electrical switch comprises a base, a cover supported in spaced relationship with the base, a rotor mounted between the base and the cover for angular movement relative thereto, a movable contact carried by the rotor, first and second contact posts supported by the base, said contact posts being angularly spaced from one another and being bridged by said movable contact when said rotor is moved into a second angular position from a first angular position, and a conductive bridgingmember movable to bridge said first and second contact posts in response to movement of the rotor into said second angular position from said first angular position, said bridging member including a pair of limbs arranged so as to engage said first contact post in'said first angular position of the rotor, movement of the rotor from said first angular position into said secondangular position moving one of said limbs into engagement with said second contact post, the arrangementfurther being such that if said rotor is moved from said first angular
  • the switch further includes a third contact post-positioned on the side of said first contact post remote from said second contact post and angularly spacedfrom said first contact post, said first and third contact posts being bridged by the movable contact in said firstangular position of the rotor, and said bridging member being movable in response to movement of the rotor to a further predetermined angular position to bridge said first and third contact posts.
  • said limbs are formed of a resilient material and are arranged so as to be urged by theirown resilience into engagement with said first contact post in said first angular position ofthe rotor.
  • the movable contact is a conductive spring-operated roller, said spring-operated roller providing detent means for retaining said rotor in said predetermined angularpositions thereof.
  • FIG. 1 is a sectional view of an electrical switch
  • FIG. 2 is a plan view of the switch shown in FIG. 1 with the cover removed.
  • the switch includes a base 11 and a cover 12 supported in spaced relationship above the bascll. Mounted between the base 11 and the cover 12 is a moulded synthetic resin. rotor 13, the
  • the rotor 13 being formed adjacent one end 14 thereof with an integral post 15 which extends through apertures in the base I l and the cover 12 respectively tojournal the rotor 13 for angular movement relative to the base and the cover.
  • the rotor 13 includes a downwardly projecting peg 16 which extends into an arcuate slot in the conductive po'sts18, 19, 21 and 22.
  • the rotor 21 and 22 are positioned along an arc of a circle having its center on the rotational axis of the rotor 13 and each of the posts extends through the cover 12 to define a terminal of the switch.
  • the rotor At itsend remote from the end 14, the rotor carries a conductive roller 23, the roller 23being urged by a spring 24 supported in a bore 25 in the rotor 13 into bridging engagement with adjacent pairsof conductive posts 18, 19, 21 and 22.
  • a conductive wire spring 26 Mounted around the post 15 between the rotor 13 and the cover 12 is a conductive wire spring 26, the
  • spring 26 being shaped to define a pair of limbs 27,28'
  • the conductive posts 18,19, 21 and 22 together with the spring urged roller 23 define three stable positions of the rotor 13 during angular movement of the rotor; In a first position of the rotor the roller 23 is engaged with the posts 18, 19 to complete a circuit therebetween and in second and third positions of the rotor 13 the roller 23 completes circuits between the posts 19, 21 and the posts 21,22 respectively.
  • the spring 26 is stationary, and in these positions, since the limbs 27, 28 of the spring are engaged only with the contact post 21, the springdoes not complete any circuits within the switch.
  • the switch described above is particularly designed for use in controlling operation of a self-parking, twospeed, permanent magnet windscreen wiper motor.
  • the contact post 21 defines the feed terminal of the switch, whereas the posts 19, 22 are connected in the slow speed and fast speed circuits respectively on the wiper.
  • the roller 23 bridges the posts 19, 21 to complete the slow speed circuit of the motor and in the third position the roller 23 bridges the posts 21,22 to complete the fast speed circuit of the motor.
  • the contact post 18 is connected to the parking switch of the wiper motor to earth so that in the first positionof the rotor 13, when the windscreen wipers have completed a stroke, then the armature of the windscreen wiper motor is shortcircuited to achieve dynamic braking of the motor.
  • An electrical switch comprising a base, a cover supported in spaced relationship with the base, a rotor, means mounting the rotor between the base and the cover for angular movement relative thereto between a first angular position and a second angular position a movable contact carried by the rotor, first and second contact posts supported by'the base, said contact posts being angularly spaced from one another and being bridged by said movable contact when the rotor is moved into said Second angular position from said first angular position, a conductive bridging member movable to bridge said first and second contact posts in response to movement of the rotor into said second angular position from said first angular position, said bridging member including a pair of limbs which engage said first contact post in said first angular position of the rotor, movement of the rotor from said first angular position into said second angular position movin'g one of said limbs into engagement with said second contact post, and abutment means carried by
  • a switch as claimed in claim 1 further including a third contact post positioned on the side of said first contact post remote from said second contact post and angularly spaced from said first contact post, said first and third contact posts being bridged by the movable contact in said first angular position of the rotor, and said bridging member being movable in response to movement of the rotor to a further predetermined angular position to bridge said first and third contact posts.
  • a switch as claimed in claim 1 in which said limbs are formed of a resilient material and are arranged so as to be urged by their own resilience-into engagement with said first contact post in said first angularposition of the rotor.

Landscapes

  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Tumbler Switches (AREA)
  • Motor Or Generator Frames (AREA)
  • Motor And Converter Starters (AREA)
US00187272A 1970-10-24 1971-10-07 Electrical switch having two movable contacts operable by a rotor and having fixed contact posts Expired - Lifetime US3746803A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5063570 1970-10-24

Publications (1)

Publication Number Publication Date
US3746803A true US3746803A (en) 1973-07-17

Family

ID=10456712

Family Applications (1)

Application Number Title Priority Date Filing Date
US00187272A Expired - Lifetime US3746803A (en) 1970-10-24 1971-10-07 Electrical switch having two movable contacts operable by a rotor and having fixed contact posts

Country Status (8)

Country Link
US (1) US3746803A (pm)
JP (1) JPS5232068B1 (pm)
AU (1) AU458154B2 (pm)
CS (1) CS162766B2 (pm)
DE (1) DE2145312C3 (pm)
ES (1) ES172393Y (pm)
FR (1) FR2111527A5 (pm)
GB (1) GB1346577A (pm)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4179593A (en) * 1979-03-13 1979-12-18 Olympus Optical Company, Ltd. Change-over switch for printed circuit board

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1559531A (en) * 1976-01-20 1980-01-23 Nordic Finance & Trade Ltd Inc Electrical switches

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3629524A (en) * 1969-03-17 1971-12-21 Lucas Industries Ltd Pivotal switch with rotor carrying two movable contacts and having three stable and one unstable operating positions

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3629524A (en) * 1969-03-17 1971-12-21 Lucas Industries Ltd Pivotal switch with rotor carrying two movable contacts and having three stable and one unstable operating positions

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4179593A (en) * 1979-03-13 1979-12-18 Olympus Optical Company, Ltd. Change-over switch for printed circuit board

Also Published As

Publication number Publication date
JPS5232068B1 (pm) 1977-08-19
DE2145312B2 (de) 1978-03-09
AU3295171A (en) 1973-03-08
DE2145312C3 (de) 1978-10-26
ES172393Y (es) 1972-08-16
GB1346577A (en) 1974-02-13
ES172393U (es) 1972-02-01
DE2145312A1 (de) 1972-04-27
JPS478827A (pm) 1972-05-09
AU458154B2 (en) 1975-02-20
CS162766B2 (pm) 1975-07-15
FR2111527A5 (pm) 1972-06-02

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