US2904647A - Sliding contact electric switches - Google Patents

Sliding contact electric switches Download PDF

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Publication number
US2904647A
US2904647A US530738A US53073855A US2904647A US 2904647 A US2904647 A US 2904647A US 530738 A US530738 A US 530738A US 53073855 A US53073855 A US 53073855A US 2904647 A US2904647 A US 2904647A
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US
United States
Prior art keywords
contact
studs
track
contact studs
selector
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Expired - Lifetime
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US530738A
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English (en)
Inventor
Clavel Jean
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Individual
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Individual
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Publication date
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Publication of US2904647A publication Critical patent/US2904647A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • H01H19/56—Angularly-movable actuating part carrying contacts, e.g. drum switch
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding

Definitions

  • the moving contact device is rigid and-canmove in adirection at: approximately right angles to the plane of the fixed contact surfiaces, the moving contact being pressed against said fixed con tacts by a flexible member to which itisconnected' imam orientabl'e' manner.
  • the flexible member preferably acts on a-point of the moving contact-located on the axis perpendicular to the contact area and passing through the center thereof.
  • the construction :of the change over switch is relatively simple, and much simpler than the construction of laminated brushes wherein each lamination must beformedand dimensioned in a particular manner.
  • its construction does not necessitate precision work since evenlarge tolerances are allowed;
  • the moving contactarea is permanently and completely applied on the fixed contactareast
  • the contact pressure is -not limited by the risk of a permanent deformation ofthe flexible parts since they are independent and can be dimensioned in consequence, and the heating of the contacts has practically noinfllr ence on that pressure.
  • the moving contact may bemade, entirely or in part, of a particularly suitable material such as silver or a sintered alloy,- a
  • the resilient member may, for instance be made of a flat sprin'g strip parallel to the plane of; the contact areas, the ends thereof being fixed to a rigid support. Such a strip can be deformed by the action of the force of Contact, which is perpendicular to said plane, but not by that ofthe force' applied to the control membenl'or securing the connection or the disconnection, which is parallel to thatgplane.
  • said' moving contact may comprise a member having a cylindrical cavity in which is located a spherical member secured to the resilient member and touching the bottom of said cavity.
  • the bridging selector member may comprise two mow ing' contact member's disposed as referred to ab'ovcand connected together, for instance, by a flexible conductor
  • the fixed contact studs of the elementary track mutually imbricated but electrically insulated from one another.
  • the elementary track on the one hand and the directing trackon the-other hand man! be disposed in two difierent planes between which the movable contact devices are moved.
  • the elementary track and the directing trackare set preferably, in this case, opposite one another in two parallel planes between which the bridging selectormemher is move'd b-y means'of a control member.
  • Each moving contact may, for instance, be carried by a flexible bar, the two bars being connected together by connecting devices passing through the moving control member, preferably with a certain play.
  • the embodiments referred to in the preceding three paragraphs offer the additional advantage over the embodiments previously referredto that, for each bridging selector member, the contact pressure is equally distributed to both contact sections on the elementary track on the one hand-,- and on the directing track onthe other hand, and also that that pressure does not depend on any of the other members composing the apparatus (for instance members ofother bridging selector members ifi there are several of them and members composing con trol devices; driving devices, positioning, assemblin-grand fixing means) ,and does notact upon them.
  • Fig. 1 represents a perspective view of a portion of a selector switch according to the invention
  • Figs 2 asectional view of adetail of same.-
  • Fig. 3 a side elevation corresponding to Fig, l.
  • Fig. 4 a front elevation of same.
  • Fig. 5 a plan view of a variant of fixed studs
  • Figs 6 is a sectional view along VI- VI of Fig. 8 showing a further embodiment and Fig. 7 a half section along VH-VII of Fig. 6.
  • Fig 8 a section along VI II-VIII of Fig. 6.
  • the selector switch comprises an elementary track comprisinga-plurality of fixedstuds :11), which can be connected by a bridgiing selector member to a fixed directing track, and are distributed in an arcuate path on arigid plate 2'.
  • the drawing represents a part only of the elementary track comprising a series of studs, and only the part of the bridging selector member cooperating with that series of studs.
  • the directing part is not shown,- but is conventional and forms no part per se of the present invention.
  • the bridging selector member comprises two cylindrical moving contacts 3, each one of which is connected to a fiat spring blade 4 which is parallel to the plane 'of the contact areas of the studs 1b, and has its endsfixed, thropgh supporting legs 5, to a control member or yoke This latter is fixed on a control road 7 which passes through plate 2 concentrically to the studs 15 and can revolve around its axis but not move longitmiinnlly.
  • each contact body 3 is fitted a clip 11, and
  • the two clips are connected by a flexible electrical conductor 12.
  • the movement communicated to the moving yoke 6 by the control member is transmitted to the moving contacts 3 through the intermediary of the blades 4 and of the balls 8, the equatorial line of which touches the wall of the corresponding cylindrical cavity.
  • the surfaces of contact of the moving elements 3, therefore, are caused to move in the plane of the contact areas of the studs 1b and slidingly to cover those contact areas.
  • the contact pressure results from the deformation of the blades 4, and it is transmitted to the contacts 3 through the balls 8 touching a point at the bottom of the cavities 9.
  • the moving contacts 3 can swivel around the balls and take any position imposed upon them, the areas of the moving contacts are strongly applied, under the action of the contact pressure, on the contact areas of the tracks, even if the latter are not exactly level with the fixed plane of contact.
  • the studs 1b of the elementary track may have, instead of a circular section as in Figs. 1 to 4, such a section that they are imbricated or overlapped as shown in Fig. 5; in which case the moving contacts 3 have a diameter not exceeding the width of the central part of the stud, as shown in dotted lines in Figure 5. Due
  • the displacement needed for the switching allows the effective area of contact between the fixed and moving contacts to remain practically constant, and the moving contacts have no tendency to rock when passing from one stud to another.
  • the selector switch comprises two supports 2a and 2b united by cross members 28 and on which the directing track In and the elementary track comprising studs 1b are disposed in an arcuate path.
  • the moving support 6 is fixed to a shaft 7 pivot-ally mounted in bearings 29a and 29b fixed in the supports 2a and 2b, at the centre of the arcuate paths of the tracks 1a and 1b.
  • the bridging selector member comprises two moving cylindrical contacts 3, of which each one is carried by a flat spring bar 4 which is parallel to the plane of the contact areas of the tracks 1a and 1b.
  • the two blades 4 are connected together by members 30 which are set on the ends of the blades and which pass with a play through sleeves 31 fixed to the moving support 6.
  • each contact 3 and the corresponding blade 4 is insured by a ball 8 housed in a cylindrical cavity 9 of the contact, slightly larger in diameter than the ball and Which carries a collar 10 riveted to the blade 4.
  • a clip 11 On each contact 3 is engaged a clip 11, and the two clips. are connected by a flexible electric conductor 12.
  • the contact pressure is equally distributed over the two sections of contact on the elementary stud 1b and the corresponding directing track la.
  • the assembly formed by the two contacts 3, thebblades 4 and the members sets itself in its Working position and is disengaged from any rigid connection with the other pieces of the switch.
  • the fixed elementary studs are made of the actual conductor of a winding, as for instance the turns of winding of an 'adjustable potentiometer or those of a variable ratio transformer, the contact areas being rectified or not.
  • An electrical selector switch comprising a continuous track, a discontinuous track consisting of a plurality of discrete fixed contacts, a selector member mounted for selective movement to connect said continuous track selectively to a discrete fixed contact of said discontinuous track, contact studs on said selector member, said contact studs being mechanically separate from each other, flexible mechanical connection means between said contact studs, flexible electrical connection means between said contact studs to effect only electrical connection therebetween and said contact studs each being mounted on a flexible leaf spring located parallel to the plane of the track, for applying said contact studs under sliding pressure on said tracks.
  • An electrical selector switch comprising a continuous track, a discontinuous track consisting of a plurality of discrete fixed contacts, a selector member mounted for selective movement to connect said continuous track selectively to a discrete fixed contact of said discontinuous track, contact studs on said selector member, said contact studs being mechanically separate from each other, flexible mechanical connection means between said contact studs, flexible electrical connection means between said contact studs to efiect only electrical connection therebetween, said contact studs each being mounted on a flexible leaf spring located parallel to the plane of the track, for applying said contact studs under sliding pressure on said tracks, each of said contact studs being rigid and having a plane surface defined by a sharp edge and each of said contact studs comprising a cylindrical cavity whose axis is at right angles to said plane surface of said contact stud.
  • An electrical selector switch comprising a continuous track, a discontinuous track consisting of a plurality of discrete fixed contacts, a selector member mounted for selective movement to connect said continuous track selectively to a discrete fixed contact of said discontinuous track, contact studs on said selector member, said contact studs being mechanically separate from each other, flexible mechanical connection means between said contact studs, flexible electrical connection means between said contact studs to eflect only electrical connection therebetween, said contact studs each being mounted on a flexible leaf spring located parallel to the plane of the track, for applying said contact studs under sliding pressure on said tracks and said tracks being located parallel to each other on opposite sides of said selector member.
  • An electrical selector switch comprising a continuous track, a discontinuous track consisting of a plurality of discrete fixed contacts, a selector member mounted for selective movement to connect said continuous track selectively toga discrete fixed contact of said discontinuous track, contact studs on said s'elecfor' member, said Contact studs being mechanically separatefrom each other, flexible mechanical connection means between said contact studs, flexible electrical connection means between said contact studs to eifect only electrical connection therebetween, said contact studs each being mounted on a flexi- :ble leaf spring located parallel to the plane of the track, for applying said contact studs under sliding pressure on said tracks and said tracks being located in the same plane on one side of said selector member.
  • An electrical selector switch comprising a continuous track, a discontinuous track consisting of a plurality of discrete fixed contacts, a selector member mounted for selective movement to connect said continuous track selectively to a discrete fixed contact of said discontinuous track, contact studs on said selector member, said contact studs being mechanically separate from each other, flexible mechanical connection means between said contact studs, flexible electrical connection means between said contact studs to eflect only electrical connection therebetween and a spring blade connected to each of said contact studs, and a strut at the end of each of said spring blades and connecting said blades together.
  • An electrical selector switch comprising a continuous track, a discontinuous track consisting of a plurality of discrete fixed contacts, a selector member mounted for selective movement to connect said continuous track selectively to a discrete fixed contact of said discontinuous track, contact studs on said selector member, said contact studs being mechanically separate from each other, flexible mechanical connection means between said contact studs, flexible electrical connection means between said contact studs to eflEect only electrical connection therebetween, a spring blade connected to each of said contact studs, a strut at the end of each of said spring blades and connecting said blades together and a driving arm between said contact studs, said struts passing freely through said driving arm, and insulation means between said struts and said driving arm.
  • An electrical selector switch comprising a continuous track, a discontinuous track consisting of a plurality of discrete fixed contacts, a selector member mounted for selective movement to connect said continuous track selectively .to a discrete fixed contact of said discontinuous track, contact studs on said selector member, said contact studs being mechanically separate from each other, flexible mechanical connection means between said contact stud-s, flexible electrical, connection means between said contact studs to effect only electrical connection therebetween, and insulated driving arm interconnecting said contact studs, a spring blade connected to each of said contact studs, and rigid plate-like connector members between the ends of said spring blades and said driving arm.
  • An electrical selector switch comprising a continuous track, a dis-continuous track consisting of a plurality of discrete fixed contacts, a selector member mounted for selective movement to connect said continuous track selectively to a discrete fixed contact of said discontinuous track, contact studs on said selector member, said contact studs being mechanically separate from each other, flexible mechanical connection means between said contact studs, flexible electrical connection means between said contact studs to effect only electrical connection therebetween, said contact studs each being mounted on a flexible leaf spring located parallel to the plane of the track, for applying said contact studs under sliding pressure on said tracks and said discontinuous track comprising a plurality of mutually imbricated studs.
  • An electrical selector switch comprising a continuous track, a discontinuous track consisting of a plurality of discrete fixed contacts, a selector member mounted for selective movement to connect said continuous track selectively to a discrete fixed contact of said discontinuous track, contact studs on said selector member, said contact studs being mechanically separate from each other, flexible mechanical connection means between said contact studs, flexible electrical connection means between said contact studs to effect only electrical connection therebetween, each of said contact studs comprising a cylindrical cavity whose axis is at right angles to said plane surface of said contact stud, a spring blade connected to each of said contact studs, a strut at the end of each of said spring blades and connecting said blades together, a ball member located freely in said cavity in each of said contact studs, and a stem secured to said ball member and to the associated one of said spring blades and said discontinuous track comprising a plurality of mutually im-bricated studs.
  • An electrical selector switch comprising a continuous track, a discontinuous track consisting of a plurality of discrete fixed contacts, a selector member mounted for selective movement to connect said continuous track selectively to a discrete fixed contact of said discontinuous track, contact studs on said selector member, said contact studs being mechanically separate from each other, flexible mechanical connection means between said contact studs, flexible electrical connection means between said contact studs to eifect only electrical connection therebetween, each of said contact studs being rigid and having a plane surface defined by a sharp edge, each of said contact studs comprising a cylindrical cavity whose axis is at right angles to said plane surface of said contact stud, said tracks being located parallel to each other on opposite sides of said selector member, a spring blade connected to each of said contact studs, a strut at the end of each of said spring blades and connecting said blades together, a driving arm between said contact studs, said struts passing freely through said driving arm, in-

Landscapes

  • Slide Switches (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Gas-Insulated Switchgears (AREA)
  • Mechanisms For Operating Contacts (AREA)
  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
US530738A 1954-08-31 1955-08-26 Sliding contact electric switches Expired - Lifetime US2904647A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1043459X 1954-08-31

Publications (1)

Publication Number Publication Date
US2904647A true US2904647A (en) 1959-09-15

Family

ID=9590558

Family Applications (2)

Application Number Title Priority Date Filing Date
US530738A Expired - Lifetime US2904647A (en) 1954-08-31 1955-08-26 Sliding contact electric switches
US799231A Expired - Lifetime US3053956A (en) 1954-08-31 1959-03-13 Rotary electric switches

Family Applications After (1)

Application Number Title Priority Date Filing Date
US799231A Expired - Lifetime US3053956A (en) 1954-08-31 1959-03-13 Rotary electric switches

Country Status (6)

Country Link
US (2) US2904647A (enrdf_load_stackoverflow)
CH (1) CH331964A (enrdf_load_stackoverflow)
DE (1) DE1043459B (enrdf_load_stackoverflow)
FR (2) FR1111214A (enrdf_load_stackoverflow)
GB (2) GB815150A (enrdf_load_stackoverflow)
NL (1) NL199943A (enrdf_load_stackoverflow)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3117491A (en) * 1962-06-29 1964-01-14 Stern Joshua Information retrieval apparatus
US3170049A (en) * 1959-02-13 1965-02-16 Electro Commutation L Electric sliding-contact switch with non-tilt operation of sliding contact
CN110957168A (zh) * 2018-09-26 2020-04-03 Abb瑞士股份有限公司 具有球面轴承型机械连接的中压或高压开关

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2994750A (en) * 1958-05-02 1961-08-01 Littelfuse Inc Snap acting switch
DE1158148B (de) * 1961-10-12 1963-11-28 Eduard Winkler Appbau G M B H U-foermige Kontaktbruecke fuer Drehschalter, insbesondere Stufenschalter
US3254190A (en) * 1962-12-12 1966-05-31 Westinghouse Electric Corp Conducting structure and electric switch with resilient conducting means
US3501600A (en) * 1968-02-19 1970-03-17 James E Saulmon Ignition distributor
NL160973C (nl) * 1976-07-23 1979-12-17 Coq Bv Meerfasen scheidingsschakelaar.
DE2635255C3 (de) * 1976-08-05 1981-02-26 Dieter 7031 Gaertringen Reichert Schlüsselschalter, insbesondere für Kfz-Türen
AT347273B (de) * 1976-08-09 1978-12-27 Dieter Reichert Schalter fuer tuerschloesser
US5128661A (en) * 1982-10-12 1992-07-07 Robertshaw Controls Company Solid state rotary entry control system
US4777483A (en) * 1982-10-12 1988-10-11 Robertshaw Controls Company Solid state rotary entry control system
GB2312096B (en) * 1996-03-28 2000-08-30 Niles Parts Co Ltd Inhibitor switch device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE289554C (enrdf_load_stackoverflow) *
US452359A (en) * 1891-05-19 Electric switching apparatus
US801285A (en) * 1904-12-19 1905-10-10 Westinghouse Electric & Mfg Co Electric controller.
US844630A (en) * 1906-04-24 1907-02-19 Robert Temple Speed-controller for electric motors.
US905588A (en) * 1906-02-08 1908-12-01 Ralph R Root Electric controller.
US2200995A (en) * 1937-02-05 1940-05-14 Westinghouse Electric & Mfg Co Circuit controller

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1919949A (en) * 1931-09-10 1933-07-25 Gen Electric Electric heating system
US2549998A (en) * 1945-12-06 1951-04-24 Grigsby Allison Co Inc Electric switch construction
US2722645A (en) * 1952-02-07 1955-11-01 Brown Brockmeyer Company Voltage changer switch for a. c. motor
US2681393A (en) * 1952-06-16 1954-06-15 Us Army Switch

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE289554C (enrdf_load_stackoverflow) *
US452359A (en) * 1891-05-19 Electric switching apparatus
US801285A (en) * 1904-12-19 1905-10-10 Westinghouse Electric & Mfg Co Electric controller.
US905588A (en) * 1906-02-08 1908-12-01 Ralph R Root Electric controller.
US844630A (en) * 1906-04-24 1907-02-19 Robert Temple Speed-controller for electric motors.
US2200995A (en) * 1937-02-05 1940-05-14 Westinghouse Electric & Mfg Co Circuit controller

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3170049A (en) * 1959-02-13 1965-02-16 Electro Commutation L Electric sliding-contact switch with non-tilt operation of sliding contact
US3117491A (en) * 1962-06-29 1964-01-14 Stern Joshua Information retrieval apparatus
CN110957168A (zh) * 2018-09-26 2020-04-03 Abb瑞士股份有限公司 具有球面轴承型机械连接的中压或高压开关
CN110957168B (zh) * 2018-09-26 2024-02-09 日立能源有限公司 具有球面轴承型机械连接的中压或高压开关

Also Published As

Publication number Publication date
CH331964A (fr) 1958-08-15
GB815150A (en) 1959-06-17
FR66248E (fr) 1956-06-05
FR1111214A (fr) 1956-02-23
NL199943A (enrdf_load_stackoverflow)
US3053956A (en) 1962-09-11
DE1043459B (de) 1958-11-13
GB814528A (en) 1959-06-10

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